
From Adam.Montville@cisecurity.org  Wed Jul  3 10:02:23 2013
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From: Adam Montville <Adam.Montville@cisecurity.org>
To: "sacm@ietf.org" <sacm@ietf.org>
Thread-Topic: Berlin Meeting
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All:

While we are not yet an official WG, I'd like to try to get our ducks in a=
 row and progress as though we are a WG.  I see some important dates have =
passed, and that some are upcoming (http://www.ietf.org/meeting/cutoff-dat=
es-2013.html#IETF87).

Notably:

* 2013-07-05 (this Friday): Final agenda published
* 2013-07-15: Internet Draft submission cut-off (for all drafts, including=
 -00)
* 2013-07-17: Draft WG agendas due by UTC 24:00

Given the milestones listed in our charter, it seems that our agenda shoul=
d contain a healthy dose of use case an discussion and possibly some requi=
rements discussion.

Proposed (loose) Agenda:

* Note well + agenda bashing
* Charter and Milestone Review
* Use Case Discussion
    * Review of list
    * Presentation on latest draft (if update submitted)
* Requirements discussion (time permitting)
* Administravia (new-WG-related stuff)

Are there relevant drafts that we want to discuss in Berlin and can be sub=
mitted before the 15 July deadline?  At present, the following "related do=
cuments" show up on our Documents page (http://datatracker.ietf.org/wg/sac=
m/):

* draft-booth-sacm-vuln-model-02
* draft-waltermire-sacm-architecture-00
* draft-waltermire-sacm-use-cases-04

I'm looking forward to seeing you in Berlin!

Regards,

Adam


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<html dir=3D"ltr">
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859=
-1">
<style type=3D"text/css" id=3D"owaParaStyle"></style><style type=3D"text/c=
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<body fpstyle=3D"1" ocsi=3D"0">
<div style=3D"direction: ltr;font-family: Tahoma;color: #000000;font-size:=
 10pt;">All:
<div><br>
</div>
<div>While we are not yet an official WG, I'd like to try to get our ducks=
 in a row and progress as though we are a WG. &nbsp;I see some important d=
ates have passed, and that some are upcoming (<a href=3D"http://www.ietf.o=
rg/meeting/cutoff-dates-2013.html#IETF87" target=3D"_blank">http://www.iet=
f.org/meeting/cutoff-dates-2013.html#IETF87</a>).</div>
<div><br>
</div>
<div>Notably:</div>
<div><br>
</div>
<div>* 2013-07-05 (this Friday): Final agenda published</div>
<div>* 2013-07-15: Internet Draft submission cut-off (for all drafts, incl=
uding -00)</div>
<div>* 2013-07-17: Draft WG agendas due by UTC 24:00</div>
<div><br>
</div>
<div>Given the milestones listed in our charter, it seems that our agenda =
should contain a healthy dose of use case an discussion and possibly some =
requirements discussion.</div>
<div><br>
</div>
<div>Proposed (loose) Agenda:</div>
<div><br>
</div>
<div>* Note well &#43; agenda bashing</div>
<div>* Charter and Milestone Review</div>
<div>* Use Case Discussion</div>
<div>&nbsp; &nbsp; * Review of list</div>
<div>&nbsp; &nbsp; * Presentation on latest draft (if update submitted)</d=
iv>
<div>* Requirements discussion (time permitting)</div>
<div>* Administravia (new-WG-related stuff)</div>
<div><br>
</div>
<div>Are there relevant drafts that we want to discuss in Berlin and can b=
e submitted before the 15 July deadline? &nbsp;At present, the following &=
quot;related documents&quot; show up on our Documents page (http://datatra=
cker.ietf.org/wg/sacm/):</div>
<div><br>
</div>
<div>* draft-booth-sacm-vuln-model-02</div>
<div>* draft-waltermire-sacm-architecture-00</div>
<div>* draft-waltermire-sacm-use-cases-04</div>
<div><br>
</div>
<div>I'm looking forward to=20seeing you in Berlin!</div>
<div><br>
</div>
<div>Regards,</div>
<div><br>
</div>
<div>Adam</div>
<div><br>
</div>
</div>
<br clear=3D"both">
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From turners@ieca.com  Wed Jul  3 20:54:01 2013
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On 7/3/13 12:51 PM, Adam Montville wrote:
> All:
>
> While we are not yet an official WG, I'd like to try to get our ducks in
> a row and progress as though we are a WG.  I see some important dates
> have passed, and that some are upcoming
> (http://www.ietf.org/meeting/cutoff-dates-2013.html#IETF87).
>
> Notably:
>
> * 2013-07-05 (this Friday): Final agenda published
> * 2013-07-15: Internet Draft submission cut-off (for all drafts,
> including -00)
> * 2013-07-17: Draft WG agendas due by UTC 24:00
>
> Given the milestones listed in our charter, it seems that our agenda
> should contain a healthy dose of use case an discussion and possibly
> some requirements discussion.
>
> Proposed (loose) Agenda:
>
> * Note well + agenda bashing
> * Charter and Milestone Review

If it's chartered, then we can skip the charter review - it won't be up 
for discussion because it'll be approved ;)

Normally, I'd suggest that sessions avoid summaries of the existing 
drafts.  Participants (used this word on purpose) should read the drafts 
*before* they come to the session.  I'd actually like presenters to ask 
before they start who has read their draft ;)

But, being that this would be the first ever session it's probably okay 
to present what's in them.  In the future, though we can push the work 
forward and get to the point by only talking about open issues.

> * Use Case Discussion
>      * Review of list
>      * Presentation on latest draft (if update submitted)
> * Requirements discussion (time permitting)
> * Administravia (new-WG-related stuff)
>
> Are there relevant drafts that we want to discuss in Berlin and can be
> submitted before the 15 July deadline?  At present, the following
> "related documents" show up on our Documents page
> (http://datatracker.ietf.org/wg/sacm/):
>
> * draft-booth-sacm-vuln-model-02
> * draft-waltermire-sacm-architecture-00
> * draft-waltermire-sacm-use-cases-04

Ideally, all of these drafts would be updated before the meeting (hint) ;)

> I'm looking forward to seeing you in Berlin!
>
> Regards,
>
> Adam
>
>
> This message and attachments may contain confidential information. If it
> appears that this message was sent to you by mistake, any retention,
> dissemination, distribution or copying of this message and attachments
> is strictly prohibited. Please notify the sender immediately and
> permanently delete the message and any attachments.
>
>
> _______________________________________________
> sacm mailing list
> sacm@ietf.org
> https://www.ietf.org/mailman/listinfo/sacm
>

From Adam.Montville@cisecurity.org  Fri Jul  5 12:44:25 2013
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From: Adam Montville <Adam.Montville@cisecurity.org>
To: Sean Turner <turners@ieca.com>
Thread-Topic: [sacm] Berlin Meeting
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NOTE: Please ignore the confidentiality notice at the bottom of this e-mai=
l (and others) - it is added after I hit "send" and will be removed for IE=
TF correspondence sometime in the next week or two.


> -----Original Message-----
> From: Sean Turner [mailto:turners@ieca.com]
> Sent: Wednesday, July 03, 2013 8:53 PM
> To: Adam Montville
> Cc: sacm@ietf.org
> Subject: Re: [sacm] Berlin Meeting
>=20
> On 7/3/13 12:51 PM, Adam Montville wrote:
> > All:
> >
> > While we are not yet an official WG, I'd like to try to get our ducks
> > in a row and progress as though we are a WG.  I see some important
> > dates have passed, and that some are upcoming
> > (http://www.ietf.org/meeting/cutoff-dates-2013.html#IETF87).
> >
> > Notably:
> >
> > * 2013-07-05 (this Friday): Final agenda published
> > * 2013-07-15: Internet Draft submission cut-off (for all drafts,
> > including -00)
> > * 2013-07-17: Draft WG agendas due by UTC 24:00
> >
> > Given the milestones listed in our charter, it seems that our agenda
> > should contain a healthy dose of use case an discussion and possibly
> > some requirements discussion.
> >
> > Proposed (loose) Agenda:
> >
> > * Note well + agenda bashing
> > * Charter and Milestone Review
>=20
> If it's chartered, then we can skip the charter review - it won't be up =
for
> discussion because it'll be approved ;)

Fair enough.  Consider the two stricken from the proposed agenda.

>=20
> Normally, I'd suggest that sessions avoid summaries of the existing draf=
ts.
> Participants (used this word on purpose) should read the drafts
> *before* they come to the session.  I'd actually like presenters to ask =
before
> they start who has read their draft ;)
>=20
> But, being that this would be the first ever session it's probably okay =
to
> present what's in them.  In the future, though we can push the work forw=
ard
> and get to the point by only talking about open issues.

I would encourage everyone to read ahead even for this first session and w=
ould anticipate review of these to be minimal and only for those who may n=
ot otherwise have heard about SACM work before Berlin.

>=20
> > * Use Case Discussion
> >      * Review of list
> >      * Presentation on latest draft (if update submitted)
> > * Requirements discussion (time permitting)
> > * Administravia (new-WG-related stuff)
> >
> > Are there relevant drafts that we want to discuss in Berlin and can be=

> > submitted before the 15 July deadline?  At present, the following
> > "related documents" show up on our Documents page
> > (http://datatracker.ietf.org/wg/sacm/):
> >
> > * draft-booth-sacm-vuln-model-02
> > * draft-waltermire-sacm-architecture-00
> > * draft-waltermire-sacm-use-cases-04
>=20
> Ideally, all of these drafts would be updated before the meeting (hint) =
;)

I am unsure as to the state of the vulnerability model and the architectur=
e document.  I know that David Harrington has been working on trimming up =
the use case document.

On that note, he has asked on several occasions for some more concrete use=
 case examples, but I haven't really seen many provided.  It would be good=
 for this community to throw a few out there.  Remember that use cases don=
't need to be comprehensive with respect to the requirements.  They should=
 exemplify.

If there are use cases treated elsewhere, but to which access is limited (=
i.e. other organizations have published similar use cases but the document=
s aren't free), then I suggest that we summarize them here without simply =
referencing that work.


>=20
> > I'm looking forward to seeing you in Berlin!
> >
> > Regards,
> >
> > Adam
> >
> >
> > This message and attachments may contain confidential information. If
> > it appears that this message was sent to you by mistake, any
> > retention, dissemination, distribution or copying of this message and
> > attachments is strictly prohibited. Please notify the sender
> > immediately and permanently delete the message and any attachments.
> >
> >
> > _______________________________________________
> > sacm mailing list
> > sacm@ietf.org
> > https://www.ietf.org/mailman/listinfo/sacm
> >
>=20
> ...

This message and attachments may contain confidential information.  If it =
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From shanna@juniper.net  Fri Jul  5 13:40:21 2013
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From: Stephen Hanna <shanna@juniper.net>
To: "sacm@ietf.org" <sacm@ietf.org>
Thread-Topic: SACM Use Cases
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Date: Fri, 5 Jul 2013 20:39:53 +0000
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Subject: [sacm] SACM Use Cases
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I have a few comments and questions on the SACM Use Cases
document. Since Adam has encouraged us to discuss it and
offer our thoughts, I'll do so now.

First, I recall that we previously agreed to focus our
work on UC1 only for now. Our current draft charter
seems to reflect that agreement, which is good! So I
suggest that UC2 and UC3 be removed from the use case
document before it becomes a Working Group document.

Second, I often find it's helpful to have specific
examples in use cases to make them concrete. After all,
people want to solve specific problems with our systems.
And this can keep us grounded.

For example, we could add an example for UC1 that
says:

In order to meet compliance requirements and ensure that
corporate finance information is not revealed improperly,
all computers in the finance department of Example
Corporation are required to run only software contained
on an approved list and to be configured to download and
install software patches every night. Each computer is
checked to make sure it complies with this policy whenever
it connects to the network and at least once a day
thereafter. As part of this daily compliance check,
the SACM protocols are used to assess the posture of
each computer and report on its compliance with policy.
Handling of non-compliant endpoints is not part of
the SACM architecture.

What do people think? Do you like having such examples?
If so, I can write a few more such as one where
suspicious endpoint behavior (like contacting a known
command and control server) triggers a compliance check.
Or one dealing with user-owned (BYOD) devices. These
examples may translate into sub-cases of UC1 or we
may decide to break out UC1 into several use cases.
Other examples could include pulling up a report to
see which endpoints have a particular version of
software that has just been discovered to have a
particular vulnerability. Or which endpoints have
*ever* had that software, since the vulnerability
might have been exploited before we learned of it.

I'm glad we're getting a bit more specific here.
That seems appropriate for a use case document!

BTW, I see that the charter calls for the use cases
to go into the Architecture document. OK by me! But
let's start with use cases before we spend too much
time talking about architecture. Best to fully
understand the problem before we design the solution!

And yes, I know that may of us probably think we have
a clear idea of the problem already. The issue is
that until we've written down the problem description
in excruciating detail with examples and agreed upon
it, we probably all have different understandings of
exactly what the problem is. That's normal.

Thanks,

Steve




From ietfdbh@comcast.net  Fri Jul  5 16:17:02 2013
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From: "ietfdbh" <ietfdbh@comcast.net>
To: "'Adam Montville'" <Adam.Montville@cisecurity.org>, "'Sean Turner'" <turners@ieca.com>
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>  I know that David Harrington has been working on trimming up
> the use case document.
> 
> On that note, he has asked on several occasions for some more concrete use
> case examples, but I haven't really seen many provided.  It would be good
> for this community to throw a few out there.  Remember that use cases
> don't need to be comprehensive with respect to the requirements.  They
> should exemplify.

Remember that the IETF mantra is "rough consensus and running code" - the
IETF focuses on a bottom-up approach; we like to look at what has been
implemented in products or open source, etc. and try to reach consensus on
the good common functionality across multiple  examples of existing "running
code".
What we have so far seems be a lot of 50,000 foot abstractions and promises
of what the industry will be able to do with what we produce.
It reminds me of vaporware marketing ...

It would be really good to get some examples of "running code" as use cases.
For example, "we ship an application that controls user access to the
network, and we use the IETF NEA protocol to gather data, using this
information model, and this method of assessment. Implementer feedback has
shown these aspects of the specification to be problematic in certain
environments for these reasons;  customer feedback on deployment of this
approach has been successful in these environments, but less successful in
these other environments because ...."

Or "we have running code for an IPS implementation, in shipping product, and
here is text that describes the information model and method of assessing
abnormal user behavior,  and this method for establishing policy about
acceptable variation from normal, and have found that it works well." (UC3)

Or, "we have running code in an open source library for continuously
monitoring router security configuration. We find that the standards are
inadequate in expressing information for this aspect of router
configuration, and we had to supplement the standards with our own
proprietary data model to add this functionality to our monitoring."

We have gotten a number of pointers to work done elsewhere, but it is
usually to other standards organizations' specifications. 
Well, if other SDOs have already written specifications in this space, then
why do we need to do anything in the IETF? The IETF doesn't do
rubber-stamping of other organizations' specifications.
It would be good to get internet-drafts that describes the specifications of
other fora that have addressed these issues, and - most importantly - the
field experience of implementations/deployments of those other approaches.
So if you think we should consider a DMTF information model, or 3GPP
information model, or NIST/MITRE information model, then it really should be
submitted to the IETF, in an Internet-draft, under IETF IPR rules, and
giving change control to the IETF, so we can consider the proposal as input
to an IETF design.
If you think we should consider such specifications because you have
implemented or deployed them and think they work well, then write an ID that
discusses your implementation/deployment experience with those other
specifications.

> 
> If there are use cases treated elsewhere, but to which access is limited
(i.e.
> other organizations have published similar use cases but the documents
> aren't free), then I suggest that we summarize them here without simply
> referencing that work.
> 

And, as always, we welcome text that you propose we add to the use-cases
document (or other documents).

David Harrington
ietfdbh@comcast.net
+1-603-828-1401


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From: Stephen Hanna <shanna@juniper.net>
To: ietfdbh <ietfdbh@comcast.net>, 'Adam Montville' <Adam.Montville@cisecurity.org>, 'Sean Turner' <turners@ieca.com>
Thread-Topic: [sacm] Berlin Meeting
Thread-Index: Ac54C8T0vI3rw79uRzyAYc89//zKvgAXlUkAAFN27IAAB24iAAABmZIw
Date: Sat, 6 Jul 2013 00:29:42 +0000
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Dave Harrington wrote:
> It would be really good to get some examples of "running
> code" as use cases.

OK, Dave. I'll bite and send some info on running code that
uses open standards for endpoint assessment. I expect that
others will also, after they return from their holiday weekend.

Dozens of products (open source and commercial) and
thousands of customers (millions of users) have done
endpoint assessment using the TNC/NEA standards.
Customers typically use these standards to solve
problems like the ones described in RFC 5209 (the
NEA Requirements spec). Those problems are very
similar to the ones described for SACM but we seem
to be adding a bit more by wanting to have a
standard compliance language and some reporting.
Maybe also the ability to assess devices that don't
have NEA support built in, which TNC can sort of
support via the IF-MAP and CESP specs (although
some aspects of that are underspecified right now).

SCAP has standards for a standard compliance language
and some reporting but they don't seem to have any
actual protocols for endpoint assessment.

Now you probably want more hard facts. Which products
support the TNC standards? Which customers are using
them? What are they doing with them?

TCG has a certification program for products that
have implemented the TNC/NEA specs. The list of
certified products is here:

https://www.trustedcomputinggroup.org/certification/tnc_certified_products_=
list

And this page has links to case studies that document
actual customers who have happily implemented this:

https://www.trustedcomputinggroup.org/solutions/network_access_and_identity

The SCAP Validation Program is here:

http://scap.nist.gov/validation/

For a list of validated products, go here:

http://nvd.nist.gov/scapproducts.cfm

I don't have links to case studies from customers
who are using the SCAP standards. I'm sure that
some of the SCAP experts on this list can provide
links.

I don't want to toot my own horn but since you asked
for first-hand experience, I will say that Juniper
has been shipping products that conform to the TNC
standards for the last eight years and those standards
work pretty darn well! Not perfect and more is needed
but they are a good starting point. For my ideas on
how the TNC/NEA standards can be used for SACM and
what more is needed, see this draft:

http://datatracker.ietf.org/doc/draft-hanna-sacm-assessment-protocols

I guess I'd better update that draft to wake it
from its dormancy and bring it up to date. Will do.

You asked why IETF needs to be involved if there are
already standards in this area. As described in my
I-D linked to above, the TNC/NEA standards don't
provide a rich enough language for policy checks.
SCAP can provide that and fits nicely with the TNC
protocols. For one idea on how to fit those specs
together, see this Public Review draft (not final):

http://www.trustedcomputinggroup.org/resources/tnc_scap_messages_for_ifm

Obviously, that document would need more work to
be ready. And many of the SCAP documents aren't
really open standards, at least in my view. And
we need a way to handle endpoints that don't support
the TNC/NEA protocols. TCG has some solutions in
that area (IF-MAP and CESP) but I would never claim
that TCG has the answer to everything. IETF brings
together an unparalleled group of experts who will
make the SACM specs much better than what went in.

Like you, I'm allergic to "meta-architectural
frameworks", as Radia Perlman calls them. Let's
get specific!

Please respond to the other email I sent today on
use cases. Let's get that document nailed down to
some specific problems that real customers have.
Then we can move on to creating standards that
solve those problems, preferably by starting with
standards that have been used for years in the
real world so that we know what their flaws are
and we can fix them!

Thanks,

Steve

> -----Original Message-----
> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf Of
> ietfdbh
> Sent: Friday, July 05, 2013 7:17 PM
> To: 'Adam Montville'; 'Sean Turner'
> Cc: sacm@ietf.org
> Subject: Re: [sacm] Berlin Meeting
>=20
> >  I know that David Harrington has been working on trimming up
> > the use case document.
> >
> > On that note, he has asked on several occasions for some more
> concrete use
> > case examples, but I haven't really seen many provided.  It would be
> good
> > for this community to throw a few out there.  Remember that use cases
> > don't need to be comprehensive with respect to the requirements.
> They
> > should exemplify.
>=20
> Remember that the IETF mantra is "rough consensus and running code" -
> the
> IETF focuses on a bottom-up approach; we like to look at what has been
> implemented in products or open source, etc. and try to reach consensus
> on
> the good common functionality across multiple  examples of existing
> "running
> code".
> What we have so far seems be a lot of 50,000 foot abstractions and
> promises
> of what the industry will be able to do with what we produce.
> It reminds me of vaporware marketing ...
>=20
> It would be really good to get some examples of "running code" as use
> cases.
> For example, "we ship an application that controls user access to the
> network, and we use the IETF NEA protocol to gather data, using this
> information model, and this method of assessment. Implementer feedback
> has
> shown these aspects of the specification to be problematic in certain
> environments for these reasons;  customer feedback on deployment of
> this
> approach has been successful in these environments, but less successful
> in
> these other environments because ...."
>=20
> Or "we have running code for an IPS implementation, in shipping
> product, and
> here is text that describes the information model and method of
> assessing
> abnormal user behavior,  and this method for establishing policy about
> acceptable variation from normal, and have found that it works well."
> (UC3)
>=20
> Or, "we have running code in an open source library for continuously
> monitoring router security configuration. We find that the standards
> are
> inadequate in expressing information for this aspect of router
> configuration, and we had to supplement the standards with our own
> proprietary data model to add this functionality to our monitoring."
>=20
> We have gotten a number of pointers to work done elsewhere, but it is
> usually to other standards organizations' specifications.
> Well, if other SDOs have already written specifications in this space,
> then
> why do we need to do anything in the IETF? The IETF doesn't do
> rubber-stamping of other organizations' specifications.
> It would be good to get internet-drafts that describes the
> specifications of
> other fora that have addressed these issues, and - most importantly -
> the
> field experience of implementations/deployments of those other
> approaches.
> So if you think we should consider a DMTF information model, or 3GPP
> information model, or NIST/MITRE information model, then it really
> should be
> submitted to the IETF, in an Internet-draft, under IETF IPR rules, and
> giving change control to the IETF, so we can consider the proposal as
> input
> to an IETF design.
> If you think we should consider such specifications because you have
> implemented or deployed them and think they work well, then write an ID
> that
> discusses your implementation/deployment experience with those other
> specifications.
>=20
> >
> > If there are use cases treated elsewhere, but to which access is
> limited
> (i.e.
> > other organizations have published similar use cases but the
> documents
> > aren't free), then I suggest that we summarize them here without
> simply
> > referencing that work.
> >
>=20
> And, as always, we welcome text that you propose we add to the use-
> cases
> document (or other documents).
>=20
> David Harrington
> ietfdbh@comcast.net
> +1-603-828-1401
>=20
> _______________________________________________
> sacm mailing list
> sacm@ietf.org
> https://www.ietf.org/mailman/listinfo/sacm
>=20




From ietfdbh@comcast.net  Sat Jul  6 05:58:36 2013
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Subject: Re: [sacm] SACM Use Cases
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Thank you Steve.
Specific examples seem very helpful in understanding the scope of the
problem, so we can better focus on the scope of the possible solution(s).
Comments inline ...


> -----Original Message-----
> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf Of
> Stephen Hanna
> Sent: Friday, July 05, 2013 4:40 PM
> To: sacm@ietf.org
> Subject: [sacm] SACM Use Cases
> 
> I have a few comments and questions on the SACM Use Cases document.
> Since Adam has encouraged us to discuss it and offer our thoughts, I'll do
so
> now.
> 
> First, I recall that we previously agreed to focus our work on UC1 only
for
> now. Our current draft charter seems to reflect that agreement, which is
> good! So I suggest that UC2 and UC3 be removed from the use case
> document before it becomes a Working Group document.

I can do that if there is consensus.
Anybody disagree strongly with removing these sections, and focusing solely
on UC1 in this document?

We can re-title this document "Using Security Posture Assessment to Grant
Access to Network Resources"
Comments?
Anybody want to develop documents for use cases for UC2 and UC3?
(everything can be merged/broken out differently later if desired.)

> 
> Second, I often find it's helpful to have specific examples in use cases
to
> make them concrete. After all, people want to solve specific problems with
> our systems.
> And this can keep us grounded.

I definitely agree with this.

> 
> For example, we could add an example for UC1 that
> says:
> 
> In order to meet compliance requirements and ensure that corporate
> finance information is not revealed improperly, all computers in the
finance
> department of Example Corporation are required to run only software
> contained on an approved list and to be configured to download and install
> software patches every night. Each computer is checked to make sure it
> complies with this policy whenever it connects to the network and at least
> once a day thereafter. As part of this daily compliance check, the SACM
> protocols are used to assess the posture of each computer and report on
its
> compliance with policy.

Added the example to the UC draft.

> Handling of non-compliant endpoints is not part of the SACM architecture.

I left this part out; it didn't seem appropriate for the UC document.
Maybe it belongs in the charter or the arch doc?

> 
> What do people think? Do you like having such examples?
> If so, I can write a few more such as one where suspicious endpoint
behavior
> (like contacting a known command and control server) triggers a compliance
> check.
> Or one dealing with user-owned (BYOD) devices. These examples may
> translate into sub-cases of UC1 or we may decide to break out UC1 into
> several use cases.
> Other examples could include pulling up a report to see which endpoints
> have a particular version of software that has just been discovered to
have a
> particular vulnerability. Or which endpoints have
> *ever* had that software, since the vulnerability might have been
exploited
> before we learned of it.

I would gladly add such examples to the UC doc.
Can you please write them up for inclusion?

> 
> I'm glad we're getting a bit more specific here.
> That seems appropriate for a use case document!

+1

> 
> BTW, I see that the charter calls for the use cases to go into the
Architecture
> document. OK by me! But let's start with use cases before we spend too
> much time talking about architecture. Best to fully understand the problem
> before we design the solution!

+1

> 
> And yes, I know that may of us probably think we have a clear idea of the
> problem already. The issue is that until we've written down the problem
> description in excruciating detail with examples and agreed upon it, we
> probably all have different understandings of exactly what the problem is.
> That's normal.

Agreed. I don't know about the excruciating detail, but at least some
concrete examples of the problem(s) we're trying to solve seems called for,
to help us all get on the same page.
In addition, having some concrete examples of use cases will help others,
such as the IESG, to better understand the nature of the problems we want to
work on, and to narrow down what types of functionality and information
models might benefit from standardization. 

David Harrington
ietfdbh@comcast.net
+1-603-828-1401



From Adam.Montville@cisecurity.org  Tue Jul  9 04:27:46 2013
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> -----Original Message-----
> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf Of
> ietfdbh
> Sent: Saturday, July 06, 2013 5:58 AM
> To: 'Stephen Hanna'; sacm@ietf.org
> Subject: Re: [sacm] SACM Use Cases
>=20
> Thank you Steve.
> Specific examples seem very helpful in understanding the scope of the
> problem, so we can better focus on the scope of the possible solution(s)=
.
> Comments inline ...
>=20
>=20
> > -----Original Message-----
> > From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf
> > Of Stephen Hanna
> > Sent: Friday, July 05, 2013 4:40 PM
> > To: sacm@ietf.org
> > Subject: [sacm] SACM Use Cases
> >
> > I have a few comments and questions on the SACM Use Cases document.
> > Since Adam has encouraged us to discuss it and offer our thoughts,
> > I'll do
> so
> > now.
> >
> > First, I recall that we previously agreed to focus our work on UC1
> > only
> for
> > now. Our current draft charter seems to reflect that agreement, which
> > is good! So I suggest that UC2 and UC3 be removed from the use case
> > document before it becomes a Working Group document.
>=20
> I can do that if there is consensus.
> Anybody disagree strongly with removing these sections, and focusing sol=
ely
> on UC1 in this document?

I would not have any objection to removing these use cases from the docume=
nt, but do have a concern about "forgetting" them over time.  While we hav=
e agreed to be focused on the first use case, I do not see why we cannot i=
nclude a brief "epic" or "scenario" level description of the other use cas=
es and simply explicitly state that we are focused on the first use case, =
which would subsequently be discussed in detail.=20


>=20
> We can re-title this document "Using Security Posture Assessment to Gran=
t
> Access to Network Resources"
> Comments?



> Anybody want to develop documents for use cases for UC2 and UC3?
> (everything can be merged/broken out differently later if desired.)
>=20
> >
> > Second, I often find it's helpful to have specific examples in use
> > cases
> to
> > make them concrete. After all, people want to solve specific problems
> > with our systems.
> > And this can keep us grounded.
>=20
> I definitely agree with this.
>=20
> >
> > For example, we could add an example for UC1 that
> > says:
> >
> > In order to meet compliance requirements and ensure that corporate
> > finance information is not revealed improperly, all computers in the
> finance
> > department of Example Corporation are required to run only software
> > contained on an approved list and to be configured to download and
> > install software patches every night. Each computer is checked to make=

> > sure it complies with this policy whenever it connects to the network
> > and at least once a day thereafter. As part of this daily compliance
> > check, the SACM protocols are used to assess the posture of each
> > computer and report on
> its
> > compliance with policy.
>=20
> Added the example to the UC draft.
>=20
> > Handling of non-compliant endpoints is not part of the SACM architectu=
re.
>=20
> I left this part out; it didn't seem appropriate for the UC document.
> Maybe it belongs in the charter or the arch doc?
>=20
> >
> > What do people think? Do you like having such examples?

I would not be surprised if many in this community have these or similar e=
xamples in mind when reading these documents.  That said, I'd like to be a=
s helpful as possible for newcomers to our problem domain, so I have no ob=
jection to including such examples.  My concern is that we end up building=
 something that is too constrained for other valid examples, so we may hav=
e to watch for that.


> > If so, I can write a few more such as one where suspicious endpoint
> behavior
> > (like contacting a known command and control server) triggers a
> > compliance check.
> > Or one dealing with user-owned (BYOD) devices. These examples may
> > translate into sub-cases of UC1 or we may decide to break out UC1 into=

> > several use cases.
> > Other examples could include pulling up a report to see which
> > endpoints have a particular version of software that has just been
> > discovered to
> have a
> > particular vulnerability. Or which endpoints have
> > *ever* had that software, since the vulnerability might have been
> exploited
> > before we learned of it.
>=20
> I would gladly add such examples to the UC doc.
> Can you please write them up for inclusion?

Steve, if you need help with some of these (for the sake of time, I know y=
ou don't need "help" considering the examples), let me know and I'll write=
 a couple (just be specific about which ones you'd like me to write).

For that matter, I would encourage others on the list to look at the detai=
led examples that have been provided and to submit, perhaps as a reply to =
this thread, your own examples.  The more examples we have, the better abs=
tractions we'll be able to see, and thus a better architecture should be a=
chievable.

>=20
> >
> > I'm glad we're getting a bit more specific here.
> > That seems appropriate for a use case document!
>=20
> +1

+1, but let's not go overboard either :-)  We should have enough example t=
o enable careful readers to build an abstract model in their minds, so as =
to yield an effective overall architecture...

>=20
> >
> > BTW, I see that the charter calls for the use cases to go into the
> Architecture
> > document. OK by me! But let's start with use cases before we spend too=

> > much time talking about architecture. Best to fully understand the
> > problem before we design the solution!
>=20
> +1

+1

>=20
> >
> > And yes, I know that may of us probably think we have a clear idea of
> > the problem already. The issue is that until we've written down the
> > problem description in excruciating detail with examples and agreed
> > upon it, we probably all have different understandings of exactly what=
 the
> problem is.
> > That's normal.
>=20
> Agreed. I don't know about the excruciating detail, but at least some
> concrete examples of the problem(s) we're trying to solve seems called f=
or,
> to help us all get on the same page.
> In addition, having some concrete examples of use cases will=20help othe=
rs,
> such as the IESG, to better understand the nature of the problems we wan=
t
> to work on, and to narrow down what types of functionality and informati=
on
> models might benefit from standardization.
>=20
> David Harrington
> ietfdbh@comcast.net
> +1-603-828-1401
>=20
>=20
> _______________________________________________
> sacm mailing list
> sacm@ietf.org
> https://www.ietf.org/mailman/listinfo/sacm
>=20
> ...

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Subject: [sacm] charter status
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The charter was approved on today's call.  You'll see the official 
announcement early next week.

spt

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Subject: [sacm] Fwd: I-D Action: draft-handt-sacm-alternate-architecture-00.txt
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Food for thought.

spt
-------- Original Message --------
Subject: I-D Action: draft-handt-sacm-alternate-architecture-00.txt
Date: Thu, 11 Jul 2013 09:26:58 -0700
From: internet-drafts@ietf.org
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To: i-d-announce@ietf.org


A New Internet-Draft is available from the on-line Internet-Drafts 
directories.


	Title           : sacm: Alternate Architecture
	Author(s)       : Russ Housley
                           Sean Turner
	Filename        : draft-handt-sacm-alternate-architecture-00.txt
	Pages           : 5
	Date            : 2013-07-11

Abstract:
    This document proposes and alternate architecture for sacm (a
    proposed working group at the time this draft was submitted).


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-handt-sacm-alternate-architecture

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Subject: [sacm] Fwd: I-D Action: draft-handt-sacm-asset-identifiers-00.txt
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More food for thought.

spt

-------- Original Message --------
Subject: I-D Action: draft-handt-sacm-asset-identifiers-00.txt
Date: Thu, 11 Jul 2013 09:50:15 -0700
From: internet-drafts@ietf.org
Reply-To: internet-drafts@ietf.org
To: i-d-announce@ietf.org


A New Internet-Draft is available from the on-line Internet-Drafts 
directories.


	Title           : sacm: Asset Identifier
	Author(s)       : Russ Housley
                           Sean Turner
	Filename        : draft-handt-sacm-asset-identifiers-00.txt
	Pages           : 7
	Date            : 2013-07-11

Abstract:
    This document examines the asset identifiers available for sacm and
    it proposes that OIDs (Object Identifiers) be selected as the asset
    identifier format.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-handt-sacm-asset-identifiers

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From dbharrington@comcast.net  Fri Jul 12 07:07:46 2013
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From: "David Harrington" <dbharrington@comcast.net>
To: "'Sean Turner'" <turners@ieca.com>, <sacm@ietf.org>
References: <20130711162658.7093.66495.idtracker@ietfa.amsl.com> <51DEDDE5.2070101@ieca.com>
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Subject: Re: [sacm] Fwd: I-D Action:	draft-handt-sacm-alternate-architecture-00.txt
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Hi,

While I don't fully agree with the original architecture, I find it easier
to understand the intended functionality than in the alternate architecture.

I understand the goal here of showing where the on-the-wire protocols
operate between entities.
The data flows in the Waltermire architecture do not clearly capture the
on-the-wire-ness of the flows, and what sits where in the network.
It might be helpful to use both diagrams, combined, to show the network
entities and on-the-wire data flows, and then show within the entity boxes,
the expected functionality provided by each.

The new architecture seems focused on a combination firewall/IDS box; that
seems like a particular use case.
As you all know already, I think the scope of the sacm work needs to be
narrowed, but this might narrow it too much.

(Sean, can you write up a firewall/IDS use case that I can put into the
use-cases document for this usage?)

David Harrington
dbharrington@comcast.net
+1-603-828-1401

> -----Original Message-----
> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf Of
> Sean Turner
> Sent: Thursday, July 11, 2013 12:32 PM
> To: sacm@ietf.org
> Subject: [sacm] Fwd: I-D Action: draft-handt-sacm-alternate-architecture-
> 00.txt
> 
> Food for thought.
> 
> spt
> -------- Original Message --------
> Subject: I-D Action: draft-handt-sacm-alternate-architecture-00.txt
> Date: Thu, 11 Jul 2013 09:26:58 -0700
> From: internet-drafts@ietf.org
> Reply-To: internet-drafts@ietf.org
> To: i-d-announce@ietf.org
> 
> 
> A New Internet-Draft is available from the on-line Internet-Drafts
directories.
> 
> 
> 	Title           : sacm: Alternate Architecture
> 	Author(s)       : Russ Housley
>                            Sean Turner
> 	Filename        : draft-handt-sacm-alternate-architecture-00.txt
> 	Pages           : 5
> 	Date            : 2013-07-11
> 
> Abstract:
>     This document proposes and alternate architecture for sacm (a
>     proposed working group at the time this draft was submitted).
> 
> 
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-handt-sacm-alternate-architecture
> 
> There's also a htmlized version available at:
> http://tools.ietf.org/html/draft-handt-sacm-alternate-architecture-00
> 
> 
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
> 
> _______________________________________________
> I-D-Announce mailing list
> I-D-Announce@ietf.org
> https://www.ietf.org/mailman/listinfo/i-d-announce
> Internet-Draft directories: http://www.ietf.org/shadow.html
> or ftp://ftp.ietf.org/ietf/1shadow-sites.txt
> 
> 
> 
> _______________________________________________
> sacm mailing list
> sacm@ietf.org
> https://www.ietf.org/mailman/listinfo/sacm


From gunnar.engelbach@threatguard.com  Fri Jul 12 08:11:16 2013
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Cc: 'Sean Turner' <turners@ieca.com>, sacm@ietf.org
Subject: Re: [sacm] Fwd: I-D Action: draft-handt-sacm-alternate-architecture-00.txt
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I like the original.  It's only concerned with the logical components 
that make up SACM -- the flexibility in how they are mixed and match to 
solve real problems is one of its big strengths.

But it's also apparent that this is not being effectively communicated.

I sent some (lousy) drawings to the mailing list a while back trying to 
capture that flexibility -- attached here again for your 
amusement/befuddlement.


Do very specific use cases help people understand how these standards 
can be applied?


--gun



On 7/12/2013 10:06 AM, David Harrington wrote:
> Hi,
>
> While I don't fully agree with the original architecture, I find it easier
> to understand the intended functionality than in the alternate architecture.
>
> I understand the goal here of showing where the on-the-wire protocols
> operate between entities.
> The data flows in the Waltermire architecture do not clearly capture the
> on-the-wire-ness of the flows, and what sits where in the network.
> It might be helpful to use both diagrams, combined, to show the network
> entities and on-the-wire data flows, and then show within the entity boxes,
> the expected functionality provided by each.
>
> The new architecture seems focused on a combination firewall/IDS box; that
> seems like a particular use case.
> As you all know already, I think the scope of the sacm work needs to be
> narrowed, but this might narrow it too much.
>
> (Sean, can you write up a firewall/IDS use case that I can put into the
> use-cases document for this usage?)
>
> David Harrington
> dbharrington@comcast.net
> +1-603-828-1401
>
>> -----Original Message-----
>> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf Of
>> Sean Turner
>> Sent: Thursday, July 11, 2013 12:32 PM
>> To: sacm@ietf.org
>> Subject: [sacm] Fwd: I-D Action: draft-handt-sacm-alternate-architecture-
>> 00.txt
>>
>> Food for thought.
>>
>> spt
>> -------- Original Message --------
>> Subject: I-D Action: draft-handt-sacm-alternate-architecture-00.txt
>> Date: Thu, 11 Jul 2013 09:26:58 -0700
>> From: internet-drafts@ietf.org
>> Reply-To: internet-drafts@ietf.org
>> To: i-d-announce@ietf.org
>>
>>
>> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
>>
>>
>> 	Title           : sacm: Alternate Architecture
>> 	Author(s)       : Russ Housley
>>                             Sean Turner
>> 	Filename        : draft-handt-sacm-alternate-architecture-00.txt
>> 	Pages           : 5
>> 	Date            : 2013-07-11
>>
>> Abstract:
>>      This document proposes and alternate architecture for sacm (a
>>      proposed working group at the time this draft was submitted).
>>
>>
>> The IETF datatracker status page for this draft is:
>> https://datatracker.ietf.org/doc/draft-handt-sacm-alternate-architecture
>>
>> There's also a htmlized version available at:
>> http://tools.ietf.org/html/draft-handt-sacm-alternate-architecture-00
>>
>>
>> Internet-Drafts are also available by anonymous FTP at:
>> ftp://ftp.ietf.org/internet-drafts/
>>
>> _______________________________________________
>> I-D-Announce mailing list
>> I-D-Announce@ietf.org
>> https://www.ietf.org/mailman/listinfo/i-d-announce
>> Internet-Draft directories: http://www.ietf.org/shadow.html
>> or ftp://ftp.ietf.org/ietf/1shadow-sites.txt
>>
>>
>>
>> _______________________________________________
>> sacm mailing list
>> sacm@ietf.org
>> https://www.ietf.org/mailman/listinfo/sacm
>
> _______________________________________________
> sacm mailing list
> sacm@ietf.org
> https://www.ietf.org/mailman/listinfo/sacm
>

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From ietfdbh@comcast.net  Fri Jul 12 09:03:15 2013
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From: "ietfdbh" <ietfdbh@comcast.net>
To: "'Gunnar Engelbach'" <Gunnar.Engelbach@ThreatGuard.com>, "'David Harrington'" <dbharrington@comcast.net>
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Cc: 'Sean Turner' <turners@ieca.com>, sacm@ietf.org
Subject: Re: [sacm] Fwd: I-D Action:	draft-handt-sacm-alternate-architecture-00.txt
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I can't read your svg files.

David Harrington
ietfdbh@comcast.net
+1-603-828-1401

> -----Original Message-----
> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf Of
> Gunnar Engelbach
> Sent: Friday, July 12, 2013 11:11 AM
> To: David Harrington
> Cc: 'Sean Turner'; sacm@ietf.org
> Subject: Re: [sacm] Fwd: I-D Action: draft-handt-sacm-alternate-
> architecture-00.txt
> 
> 
> I like the original.  It's only concerned with the logical components that
make
> up SACM -- the flexibility in how they are mixed and match to solve real
> problems is one of its big strengths.
> 
> But it's also apparent that this is not being effectively communicated.
> 
> I sent some (lousy) drawings to the mailing list a while back trying to
capture
> that flexibility -- attached here again for your amusement/befuddlement.
> 
> 
> Do very specific use cases help people understand how these standards can
> be applied?
> 
> 
> --gun
> 
> 
> 
> On 7/12/2013 10:06 AM, David Harrington wrote:
> > Hi,
> >
> > While I don't fully agree with the original architecture, I find it
easier
> > to understand the intended functionality than in the alternate
architecture.
> >
> > I understand the goal here of showing where the on-the-wire protocols
> > operate between entities.
> > The data flows in the Waltermire architecture do not clearly capture the
> > on-the-wire-ness of the flows, and what sits where in the network.
> > It might be helpful to use both diagrams, combined, to show the network
> > entities and on-the-wire data flows, and then show within the entity
> boxes,
> > the expected functionality provided by each.
> >
> > The new architecture seems focused on a combination firewall/IDS box;
> that
> > seems like a particular use case.
> > As you all know already, I think the scope of the sacm work needs to be
> > narrowed, but this might narrow it too much.
> >
> > (Sean, can you write up a firewall/IDS use case that I can put into the
> > use-cases document for this usage?)
> >
> > David Harrington
> > dbharrington@comcast.net
> > +1-603-828-1401
> >
> >> -----Original Message-----
> >> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf
> Of
> >> Sean Turner
> >> Sent: Thursday, July 11, 2013 12:32 PM
> >> To: sacm@ietf.org
> >> Subject: [sacm] Fwd: I-D Action:
draft-handt-sacm-alternate-architecture-
> >> 00.txt
> >>
> >> Food for thought.
> >>
> >> spt
> >> -------- Original Message --------
> >> Subject: I-D Action: draft-handt-sacm-alternate-architecture-00.txt
> >> Date: Thu, 11 Jul 2013 09:26:58 -0700
> >> From: internet-drafts@ietf.org
> >> Reply-To: internet-drafts@ietf.org
> >> To: i-d-announce@ietf.org
> >>
> >>
> >> A New Internet-Draft is available from the on-line Internet-Drafts
> > directories.
> >>
> >>
> >> 	Title           : sacm: Alternate Architecture
> >> 	Author(s)       : Russ Housley
> >>                             Sean Turner
> >> 	Filename        : draft-handt-sacm-alternate-architecture-00.txt
> >> 	Pages           : 5
> >> 	Date            : 2013-07-11
> >>
> >> Abstract:
> >>      This document proposes and alternate architecture for sacm (a
> >>      proposed working group at the time this draft was submitted).
> >>
> >>
> >> The IETF datatracker status page for this draft is:
> >>
https://datatracker.ietf.org/doc/draft-handt-sacm-alternate-architecture
> >>
> >> There's also a htmlized version available at:
> >> http://tools.ietf.org/html/draft-handt-sacm-alternate-architecture-00
> >>
> >>
> >> Internet-Drafts are also available by anonymous FTP at:
> >> ftp://ftp.ietf.org/internet-drafts/
> >>
> >> _______________________________________________
> >> I-D-Announce mailing list
> >> I-D-Announce@ietf.org
> >> https://www.ietf.org/mailman/listinfo/i-d-announce
> >> Internet-Draft directories: http://www.ietf.org/shadow.html
> >> or ftp://ftp.ietf.org/ietf/1shadow-sites.txt
> >>
> >>
> >>
> >> _______________________________________________
> >> sacm mailing list
> >> sacm@ietf.org
> >> https://www.ietf.org/mailman/listinfo/sacm
> >
> > _______________________________________________
> > sacm mailing list
> > sacm@ietf.org
> > https://www.ietf.org/mailman/listinfo/sacm
> >


From iesg-secretary@ietf.org  Fri Jul 12 10:05:37 2013
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Date: Fri, 12 Jul 2013 10:05:35 -0700
Cc: sacm WG <sacm@ietf.org>
Subject: [sacm] WG Action: Formed Security Automation and Continuous Monitoring (sacm)
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A new IETF working group has been formed in the Security Area. For
additional information please contact the Area Directors or the WG
Chairs.

Security Automation and Continuous Monitoring (sacm)
------------------------------------------------
Current Status: Proposed WG

Chairs:
  Dan Romascanu <dromasca@avaya.com>
  Adam Montville <adam.montville@cisecurity.org>

Assigned Area Director:
  Sean Turner <turners@ieca.com>

Mailing list
  Address: sacm@ietf.org
  To Subscribe: https://www.ietf.org/mailman/listinfo/sacm
  Archive: http://www.ietf.org/mail-archive/web/sacm/

Charter:

Securing information and the systems that store, process, and transmit
that information is a challenging task for organizations of all sizes,
and many security practitioners spend much of their time on manual
processes. Standardized protocols to collect, verify, and update system
security configurations would allow this process to be automated, which
would free security practitioners to focus on high priority tasks and
should improve their ability to prioritize risk based on timely
information about threats and vulnerabilities.  Because this is a broad
area of work, this working group will first address enterprise use cases
pertaining to the assessment of endpoint posture (using the definitions
of Endpoint and Posture from RFC 5209).

The working group will, whenever reasonable and possible, reuse existing
protocols, mechanisms, information and data models. Of particular
interest to this working group are existing industry standards,
preferably IETF standards, that could support automation of asset,
change, configuration, and vulnerability management.

The working group will define:

1. A set of standards to enable assessment of endpoint posture. This area
of focus provides for necessary language and data format specifications.

  An example of such an endpoint posture assessment could include,
  but is not limited to, the following general steps:

  1. Identify endpoints

  2. Determine specific endpoint elements to assess

  3. Collect actual value of elements

  4. Compare actual element values to expected element values

  5. Report results

  This approach to endpoint posture collection enables multiple policies
  to be evaluated based on a single data collection activity. Policies 
  will be evaluated by comparing available endpoint posture data 
  according to rules expressed in the policy. Typically, these rules 
  will compare the actual value against an expected value or range for 
  specific posture elements. In some cases, the posture element may 
  pertain to software installation state, in which case the actual and 
  expected values may be "installed" or "not installed." Evaluation of 
  multiple posture elements may be combined using Boolean logic.

2. A set of standards for interacting with repositories of content
related to assessment of endpoint posture.

  Repository protocols are needed to store, update, and retrieve
  configuration checks and other types of content required for posture
  assessment (see step 2 above). A content repository is expected to
  house specific versions of checklists (i.e. benchmarks), may be
  required to satisfy different use cases (i.e. asset inventory,
  configuration settings, or vulnerabilities). In addition, content 
  repositories are expected to store up-to-date dictionary of specific 
  enumerations, such as those used for configuration element 
  identifiers, asset classifications, vulnerability identifiers, and so 
  on.

This working group will produce the following deliverables:

- A document or documents describing the SACM Architecture. This will
include protocol requirements and their associated use cases as well as a
description of how SACM protocols fit together into a system. This may be
a single standards-track document, or may be split up as the WG sees fit.
- A standards-track document specifying the informational model for
endpoints data posture.
- A standards-track document specifying a protocol and data format for
retrieving configuration and policy information for driving data
collection and analysis
- A standards-track document specifying a protocol and data format for
collecting actual endpoint posture

The working group will create an Internet-Draft documenting the existing
work in the IETF and in other organizations that might be used as-is or
as a starting point for developing solutions to the SACM requirements. 
The working group may decide to make of this document an Informational
RFC, but this is not a mandatory deliverable.

The working group will work in close coordination with other WGs in the
IETF (including, but not limited to MILE and NEA) in order to create
solutions that do not overlap and can be used or re-used to meet the
goals of more than one working group.

The working group will communicate with non-IETF organizations working on
related specifications and will encourage industry participation in the
development of the WG's documents.  Other organizations involved in the
sacm space include ISO/IEC and TCG, as well as government agencies such
as NIST.

SACM-related efforts are largely aligned, and may overlap, with other
IETF (and non-IETF) standardization efforts. There are common "problems"
found in SACM, that may be addressed by the work done in SNMP, IPFIX,
NETCONF, SYSLOG, NEA, MILE, and potentially others. Of particular
interest to SACM is understanding and respecting the distinctions between
itself and NEA and MILE.

One way the NEA protocols can be used is as the transport for data
collected on the endpoint to an external service or data repository for
further analysis and action. NEA may also serve the purpose of carrying
data-collection instructions.

The MILE data formats provide a format to describe incident,
threat-related incident, and indicator information. SACM data formats
provide ways to understand what endpoints are in your environment,
whether they meet policy requirements, and their current configuration
state. The data exchanged in MILE, supplementing the SACM data, creates
enhanced situational awareness, thus enabling increased understanding of
current threats and mitigations. The combined SACM and MILE data sets
become a powerful tool to automate security with descriptions of
endpoints, known vulnerabilities to those endpoints, and their
configurations along with an understanding of layered defenses.
Transports from MILE may be used by SACM.

This charter will expire in July 2016. If the charter is not updated
before that time, the WG will be closed and any remaining documents
revert back to individual Internet-Drafts.

Milestones:
  Oct 2013 - Initial submission of SACM Architecture Internet-Draft
  Nov 2013 - Initial submission of SACM Information Model Internet-Draft
  Jan 2014 - Initial submission of protocol and data format for
retrieving configuration and policy information for driving data
collection and analysis Internet-Draft
  Jan 2014 - Initial submission of protocol and data format for
collecting endpoint posture Internet-Draft
  May 2014 - Submit SACM Architecture Internet-Draft to the IESG for
consideration as Informational RFC
  Sep 2014 - Submit protocol and data format for retrieving configuration
and policy information for driving data collection and analysis
Internet-Draft to the IESG for consideration as Proposed Standard
  Sep 2014 - Submit protocol and data format for collecting endpoint
posture Internet-Draft to the IESG for consideration as Proposed Standard




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Cc: 'David Harrington' <dbharrington@comcast.net>, 'Sean Turner' <turners@ieca.com>, sacm@ietf.org
Subject: Re: [sacm] Fwd: I-D Action: draft-handt-sacm-alternate-architecture-00.txt
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Try these.  They're just not scalable.



On 7/12/2013 12:02 PM, ietfdbh wrote:
> I can't read your svg files.
>
> David Harrington
> ietfdbh@comcast.net
> +1-603-828-1401
>
>> -----Original Message-----
>> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf Of
>> Gunnar Engelbach
>> Sent: Friday, July 12, 2013 11:11 AM
>> To: David Harrington
>> Cc: 'Sean Turner'; sacm@ietf.org
>> Subject: Re: [sacm] Fwd: I-D Action: draft-handt-sacm-alternate-
>> architecture-00.txt
>>
>>
>> I like the original.  It's only concerned with the logical components that
> make
>> up SACM -- the flexibility in how they are mixed and match to solve real
>> problems is one of its big strengths.
>>
>> But it's also apparent that this is not being effectively communicated.
>>
>> I sent some (lousy) drawings to the mailing list a while back trying to
> capture
>> that flexibility -- attached here again for your amusement/befuddlement.
>>
>>
>> Do very specific use cases help people understand how these standards can
>> be applied?
>>
>>
>> --gun
>>
>>
>>
>> On 7/12/2013 10:06 AM, David Harrington wrote:
>>> Hi,
>>>
>>> While I don't fully agree with the original architecture, I find it
> easier
>>> to understand the intended functionality than in the alternate
> architecture.
>>>
>>> I understand the goal here of showing where the on-the-wire protocols
>>> operate between entities.
>>> The data flows in the Waltermire architecture do not clearly capture the
>>> on-the-wire-ness of the flows, and what sits where in the network.
>>> It might be helpful to use both diagrams, combined, to show the network
>>> entities and on-the-wire data flows, and then show within the entity
>> boxes,
>>> the expected functionality provided by each.
>>>
>>> The new architecture seems focused on a combination firewall/IDS box;
>> that
>>> seems like a particular use case.
>>> As you all know already, I think the scope of the sacm work needs to be
>>> narrowed, but this might narrow it too much.
>>>
>>> (Sean, can you write up a firewall/IDS use case that I can put into the
>>> use-cases document for this usage?)
>>>
>>> David Harrington
>>> dbharrington@comcast.net
>>> +1-603-828-1401
>>>
>>>> -----Original Message-----
>>>> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf
>> Of
>>>> Sean Turner
>>>> Sent: Thursday, July 11, 2013 12:32 PM
>>>> To: sacm@ietf.org
>>>> Subject: [sacm] Fwd: I-D Action:
> draft-handt-sacm-alternate-architecture-
>>>> 00.txt
>>>>
>>>> Food for thought.
>>>>
>>>> spt
>>>> -------- Original Message --------
>>>> Subject: I-D Action: draft-handt-sacm-alternate-architecture-00.txt
>>>> Date: Thu, 11 Jul 2013 09:26:58 -0700
>>>> From: internet-drafts@ietf.org
>>>> Reply-To: internet-drafts@ietf.org
>>>> To: i-d-announce@ietf.org
>>>>
>>>>
>>>> A New Internet-Draft is available from the on-line Internet-Drafts
>>> directories.
>>>>
>>>>
>>>> 	Title           : sacm: Alternate Architecture
>>>> 	Author(s)       : Russ Housley
>>>>                              Sean Turner
>>>> 	Filename        : draft-handt-sacm-alternate-architecture-00.txt
>>>> 	Pages           : 5
>>>> 	Date            : 2013-07-11
>>>>
>>>> Abstract:
>>>>       This document proposes and alternate architecture for sacm (a
>>>>       proposed working group at the time this draft was submitted).
>>>>
>>>>
>>>> The IETF datatracker status page for this draft is:
>>>>
> https://datatracker.ietf.org/doc/draft-handt-sacm-alternate-architecture
>>>>
>>>> There's also a htmlized version available at:
>>>> http://tools.ietf.org/html/draft-handt-sacm-alternate-architecture-00
>>>>
>>>>
>>>> Internet-Drafts are also available by anonymous FTP at:
>>>> ftp://ftp.ietf.org/internet-drafts/
>>>>
>>>> _______________________________________________
>>>> I-D-Announce mailing list
>>>> I-D-Announce@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/i-d-announce
>>>> Internet-Draft directories: http://www.ietf.org/shadow.html
>>>> or ftp://ftp.ietf.org/ietf/1shadow-sites.txt
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> sacm mailing list
>>>> sacm@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/sacm
>>>
>>> _______________________________________________
>>> sacm mailing list
>>> sacm@ietf.org
>>> https://www.ietf.org/mailman/listinfo/sacm
>>>
>

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From ietfdbh@comcast.net  Sat Jul 13 08:17:29 2013
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From: "ietfdbh" <ietfdbh@comcast.net>
To: "'Gunnar Engelbach'" <Gunnar.Engelbach@ThreatGuard.com>
References: <20130711162658.7093.66495.idtracker@ietfa.amsl.com> <51DEDDE5.2070101@ieca.com>	<012d01ce7f09$0fc8bc90$2f5a35b0$@comcast.net> <51E01C90.1040403@ThreatGuard.com> <013a01ce7f19$38d55ca0$aa8015e0$@comcast.net> <51E03F4D.1060302@ThreatGuard.com>
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Date: Sat, 13 Jul 2013 11:16:35 -0400
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Cc: 'David Harrington' <dbharrington@comcast.net>, 'Sean Turner' <turners@ieca.com>, sacm@ietf.org
Subject: Re: [sacm] Fwd: I-D Action: draft-handt-sacm-alternate-architecture-00.txt
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Hi Gunnar,

Thanks; that's much better.

I think many people will have many different approaches to their
architecture, but there will be quite a bit of commonality we can try to
extract from them.
Would you be willing to write some text quickly describing your collection,
assessment, and management system, so we can add this to the use-cases
document?
The more we understand how people plan to gather and assess data, and turn
the collected data into information that can then be used by humans, the
better we can design a solution to meet the needs of multiple approaches.


I have some questions, so I can better understand your architecture, and to
make sure I don't make any unwarranted assumptions.
Working from EntitiesInUse,
1) Do these diagrams represent a system you have already implemented?
2) Has it been deployed in real-world environments?
3) Has it been deployed in enterprise environments? Service provider
environment?
4) What are you using for protocols between the assessment server and the
computer with agent?
5) What are you using for protocols between the assessment server and the
computers without agents?
6) When the valuator gathers data from agent-less computers, does it convert
the data into the same format that is used to gather data from a computer
with agent?
7) It appears the controller always talks to the evaluator, never directly
to the data collector. I realize this is an architectural drawing, and in
actual coding a direct-connect might be used to performance improvements. Is
the intent that the controller always goes through the evaluator function? 
8) when you have a subdomain, which entities in the super-domain communicate
directly with entities in the subdomain? 
8a) Is this a server-to-server sharing of information?
8b) Can server A directly access the evaluator function in the subdomain B?
or does it proxy requests for evaluations via subdomain server B controller?
8c) Can server A directly query the data collector in subdomain B? does it
us
9) Is it fair to assume that the Independent Workstation is equivalent to a
subdomain, which just happens to support only the one workstation it is
running on?

More later ...

Thanks,
David Harrington
ietfdbh@comcast.net
+1-603-828-1401

> -----Original Message-----
> From: Gunnar Engelbach [mailto:Gunnar.Engelbach@ThreatGuard.com]
> Sent: Friday, July 12, 2013 1:39 PM
> To: ietfdbh
> Cc: 'David Harrington'; 'Sean Turner'; sacm@ietf.org
> Subject: Re: [sacm] Fwd: I-D Action: draft-handt-sacm-alternate-
> architecture-00.txt
> 
> 
> Try these.  They're just not scalable.
> 
> 
> 
> On 7/12/2013 12:02 PM, ietfdbh wrote:
> > I can't read your svg files.
> >
> > David Harrington
> > ietfdbh@comcast.net
> > +1-603-828-1401
> >
> >> -----Original Message-----
> >> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf
> >> Of Gunnar Engelbach
> >> Sent: Friday, July 12, 2013 11:11 AM
> >> To: David Harrington
> >> Cc: 'Sean Turner'; sacm@ietf.org
> >> Subject: Re: [sacm] Fwd: I-D Action: draft-handt-sacm-alternate-
> >> architecture-00.txt
> >>
> >>
> >> I like the original.  It's only concerned with the logical components
> >> that
> > make
> >> up SACM -- the flexibility in how they are mixed and match to solve
> >> real problems is one of its big strengths.
> >>
> >> But it's also apparent that this is not being effectively communicated.
> >>
> >> I sent some (lousy) drawings to the mailing list a while back trying
> >> to
> > capture
> >> that flexibility -- attached here again for your
amusement/befuddlement.
> >>
> >>
> >> Do very specific use cases help people understand how these standards
> >> can be applied?
> >>
> >>
> >> --gun
> >>
> >>
> >>
> >> On 7/12/2013 10:06 AM, David Harrington wrote:
> >>> Hi,
> >>>
> >>> While I don't fully agree with the original architecture, I find it
> > easier
> >>> to understand the intended functionality than in the alternate
> > architecture.
> >>>
> >>> I understand the goal here of showing where the on-the-wire
> >>> protocols operate between entities.
> >>> The data flows in the Waltermire architecture do not clearly capture
> >>> the on-the-wire-ness of the flows, and what sits where in the network.
> >>> It might be helpful to use both diagrams, combined, to show the
> >>> network entities and on-the-wire data flows, and then show within
> >>> the entity
> >> boxes,
> >>> the expected functionality provided by each.
> >>>
> >>> The new architecture seems focused on a combination firewall/IDS
> >>> box;
> >> that
> >>> seems like a particular use case.
> >>> As you all know already, I think the scope of the sacm work needs to
> >>> be narrowed, but this might narrow it too much.
> >>>
> >>> (Sean, can you write up a firewall/IDS use case that I can put into
> >>> the use-cases document for this usage?)
> >>>
> >>> David Harrington
> >>> dbharrington@comcast.net
> >>> +1-603-828-1401
> >>>
> >>>> -----Original Message-----
> >>>> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On
> >>>> Behalf
> >> Of
> >>>> Sean Turner
> >>>> Sent: Thursday, July 11, 2013 12:32 PM
> >>>> To: sacm@ietf.org
> >>>> Subject: [sacm] Fwd: I-D Action:
> > draft-handt-sacm-alternate-architecture-
> >>>> 00.txt
> >>>>
> >>>> Food for thought.
> >>>>
> >>>> spt
> >>>> -------- Original Message --------
> >>>> Subject: I-D Action: draft-handt-sacm-alternate-architecture-00.txt
> >>>> Date: Thu, 11 Jul 2013 09:26:58 -0700
> >>>> From: internet-drafts@ietf.org
> >>>> Reply-To: internet-drafts@ietf.org
> >>>> To: i-d-announce@ietf.org
> >>>>
> >>>>
> >>>> A New Internet-Draft is available from the on-line Internet-Drafts
> >>> directories.
> >>>>
> >>>>
> >>>> 	Title           : sacm: Alternate Architecture
> >>>> 	Author(s)       : Russ Housley
> >>>>                              Sean Turner
> >>>> 	Filename        : draft-handt-sacm-alternate-architecture-00.txt
> >>>> 	Pages           : 5
> >>>> 	Date            : 2013-07-11
> >>>>
> >>>> Abstract:
> >>>>       This document proposes and alternate architecture for sacm (a
> >>>>       proposed working group at the time this draft was submitted).
> >>>>
> >>>>
> >>>> The IETF datatracker status page for this draft is:
> >>>>
> > https://datatracker.ietf.org/doc/draft-handt-sacm-alternate-architectu
> > re
> >>>>
> >>>> There's also a htmlized version available at:
> >>>> http://tools.ietf.org/html/draft-handt-sacm-alternate-architecture-
> >>>> 00
> >>>>
> >>>>
> >>>> Internet-Drafts are also available by anonymous FTP at:
> >>>> ftp://ftp.ietf.org/internet-drafts/
> >>>>
> >>>> _______________________________________________
> >>>> I-D-Announce mailing list
> >>>> I-D-Announce@ietf.org
> >>>> https://www.ietf.org/mailman/listinfo/i-d-announce
> >>>> Internet-Draft directories: http://www.ietf.org/shadow.html or
> >>>> ftp://ftp.ietf.org/ietf/1shadow-sites.txt
> >>>>
> >>>>
> >>>>
> >>>> _______________________________________________
> >>>> sacm mailing list
> >>>> sacm@ietf.org
> >>>> https://www.ietf.org/mailman/listinfo/sacm
> >>>
> >>> _______________________________________________
> >>> sacm mailing list
> >>> sacm@ietf.org
> >>> https://www.ietf.org/mailman/listinfo/sacm
> >>>
> >


From gunnar.engelbach@threatguard.com  Sat Jul 13 12:11:27 2013
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Cc: 'David Harrington' <dbharrington@comcast.net>, 'Sean Turner' <turners@ieca.com>, sacm@ietf.org
Subject: Re: [sacm] Fwd: I-D Action: draft-handt-sacm-alternate-architecture-00.txt
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Sure.  I won't be able to get to it right away, though.




On 7/13/2013 11:16 AM, ietfdbh wrote:
> Hi Gunnar,
>
> Thanks; that's much better.
>
> I think many people will have many different approaches to their
> architecture, but there will be quite a bit of commonality we can try to
> extract from them.
> Would you be willing to write some text quickly describing your collection,
> assessment, and management system, so we can add this to the use-cases
> document?
> The more we understand how people plan to gather and assess data, and turn
> the collected data into information that can then be used by humans, the
> better we can design a solution to meet the needs of multiple approaches.
>
>
> I have some questions, so I can better understand your architecture, and to
> make sure I don't make any unwarranted assumptions.
> Working from EntitiesInUse,
> 1) Do these diagrams represent a system you have already implemented?
> 2) Has it been deployed in real-world environments?
> 3) Has it been deployed in enterprise environments? Service provider
> environment?
> 4) What are you using for protocols between the assessment server and the
> computer with agent?
> 5) What are you using for protocols between the assessment server and the
> computers without agents?
> 6) When the valuator gathers data from agent-less computers, does it convert
> the data into the same format that is used to gather data from a computer
> with agent?
> 7) It appears the controller always talks to the evaluator, never directly
> to the data collector. I realize this is an architectural drawing, and in
> actual coding a direct-connect might be used to performance improvements. Is
> the intent that the controller always goes through the evaluator function?
> 8) when you have a subdomain, which entities in the super-domain communicate
> directly with entities in the subdomain?
> 8a) Is this a server-to-server sharing of information?
> 8b) Can server A directly access the evaluator function in the subdomain B?
> or does it proxy requests for evaluations via subdomain server B controller?
> 8c) Can server A directly query the data collector in subdomain B? does it
> us
> 9) Is it fair to assume that the Independent Workstation is equivalent to a
> subdomain, which just happens to support only the one workstation it is
> running on?
>
> More later ...
>
> Thanks,
> David Harrington
> ietfdbh@comcast.net
> +1-603-828-1401
>
>> -----Original Message-----
>> From: Gunnar Engelbach [mailto:Gunnar.Engelbach@ThreatGuard.com]
>> Sent: Friday, July 12, 2013 1:39 PM
>> To: ietfdbh
>> Cc: 'David Harrington'; 'Sean Turner'; sacm@ietf.org
>> Subject: Re: [sacm] Fwd: I-D Action: draft-handt-sacm-alternate-
>> architecture-00.txt
>>
>>
>> Try these.  They're just not scalable.
>>
>>
>>
>> On 7/12/2013 12:02 PM, ietfdbh wrote:
>>> I can't read your svg files.
>>>
>>> David Harrington
>>> ietfdbh@comcast.net
>>> +1-603-828-1401
>>>
>>>> -----Original Message-----
>>>> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf
>>>> Of Gunnar Engelbach
>>>> Sent: Friday, July 12, 2013 11:11 AM
>>>> To: David Harrington
>>>> Cc: 'Sean Turner'; sacm@ietf.org
>>>> Subject: Re: [sacm] Fwd: I-D Action: draft-handt-sacm-alternate-
>>>> architecture-00.txt
>>>>
>>>>
>>>> I like the original.  It's only concerned with the logical components
>>>> that
>>> make
>>>> up SACM -- the flexibility in how they are mixed and match to solve
>>>> real problems is one of its big strengths.
>>>>
>>>> But it's also apparent that this is not being effectively communicated.
>>>>
>>>> I sent some (lousy) drawings to the mailing list a while back trying
>>>> to
>>> capture
>>>> that flexibility -- attached here again for your
> amusement/befuddlement.
>>>>
>>>>
>>>> Do very specific use cases help people understand how these standards
>>>> can be applied?
>>>>
>>>>
>>>> --gun
>>>>
>>>>
>>>>
>>>> On 7/12/2013 10:06 AM, David Harrington wrote:
>>>>> Hi,
>>>>>
>>>>> While I don't fully agree with the original architecture, I find it
>>> easier
>>>>> to understand the intended functionality than in the alternate
>>> architecture.
>>>>>
>>>>> I understand the goal here of showing where the on-the-wire
>>>>> protocols operate between entities.
>>>>> The data flows in the Waltermire architecture do not clearly capture
>>>>> the on-the-wire-ness of the flows, and what sits where in the network.
>>>>> It might be helpful to use both diagrams, combined, to show the
>>>>> network entities and on-the-wire data flows, and then show within
>>>>> the entity
>>>> boxes,
>>>>> the expected functionality provided by each.
>>>>>
>>>>> The new architecture seems focused on a combination firewall/IDS
>>>>> box;
>>>> that
>>>>> seems like a particular use case.
>>>>> As you all know already, I think the scope of the sacm work needs to
>>>>> be narrowed, but this might narrow it too much.
>>>>>
>>>>> (Sean, can you write up a firewall/IDS use case that I can put into
>>>>> the use-cases document for this usage?)
>>>>>
>>>>> David Harrington
>>>>> dbharrington@comcast.net
>>>>> +1-603-828-1401
>>>>>
>>>>>> -----Original Message-----
>>>>>> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On
>>>>>> Behalf
>>>> Of
>>>>>> Sean Turner
>>>>>> Sent: Thursday, July 11, 2013 12:32 PM
>>>>>> To: sacm@ietf.org
>>>>>> Subject: [sacm] Fwd: I-D Action:
>>> draft-handt-sacm-alternate-architecture-
>>>>>> 00.txt
>>>>>>
>>>>>> Food for thought.
>>>>>>
>>>>>> spt
>>>>>> -------- Original Message --------
>>>>>> Subject: I-D Action: draft-handt-sacm-alternate-architecture-00.txt
>>>>>> Date: Thu, 11 Jul 2013 09:26:58 -0700
>>>>>> From: internet-drafts@ietf.org
>>>>>> Reply-To: internet-drafts@ietf.org
>>>>>> To: i-d-announce@ietf.org
>>>>>>
>>>>>>
>>>>>> A New Internet-Draft is available from the on-line Internet-Drafts
>>>>> directories.
>>>>>>
>>>>>>
>>>>>> 	Title           : sacm: Alternate Architecture
>>>>>> 	Author(s)       : Russ Housley
>>>>>>                               Sean Turner
>>>>>> 	Filename        : draft-handt-sacm-alternate-architecture-00.txt
>>>>>> 	Pages           : 5
>>>>>> 	Date            : 2013-07-11
>>>>>>
>>>>>> Abstract:
>>>>>>        This document proposes and alternate architecture for sacm (a
>>>>>>        proposed working group at the time this draft was submitted).
>>>>>>
>>>>>>
>>>>>> The IETF datatracker status page for this draft is:
>>>>>>
>>> https://datatracker.ietf.org/doc/draft-handt-sacm-alternate-architectu
>>> re
>>>>>>
>>>>>> There's also a htmlized version available at:
>>>>>> http://tools.ietf.org/html/draft-handt-sacm-alternate-architecture-
>>>>>> 00
>>>>>>
>>>>>>
>>>>>> Internet-Drafts are also available by anonymous FTP at:
>>>>>> ftp://ftp.ietf.org/internet-drafts/
>>>>>>
>>>>>> _______________________________________________
>>>>>> I-D-Announce mailing list
>>>>>> I-D-Announce@ietf.org
>>>>>> https://www.ietf.org/mailman/listinfo/i-d-announce
>>>>>> Internet-Draft directories: http://www.ietf.org/shadow.html or
>>>>>> ftp://ftp.ietf.org/ietf/1shadow-sites.txt
>>>>>>
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> sacm mailing list
>>>>>> sacm@ietf.org
>>>>>> https://www.ietf.org/mailman/listinfo/sacm
>>>>>
>>>>> _______________________________________________
>>>>> sacm mailing list
>>>>> sacm@ietf.org
>>>>> https://www.ietf.org/mailman/listinfo/sacm
>>>>>
>>>
>

From michael.hammer@yaanatech.com  Mon Jul 15 09:03:14 2013
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Re: alternate architecture.

If you don't understand why using logical functional elements is better than
somebody's restrictive physical implementation, you will before long.
Having been through a couple SDO's where weeks were wasted while one vendor
tried to force others to adopt their implementation, I have no wish to
repeat that.

The big take-away I got from this alternate diagram was that you wanted the
evaluator to directly access the sensor (asset) and prohibit other means of
accessing the repository.
I have to wonder is that is as scalable as the original architecture.
Your simplified architecture would simply be:  Sensor-Evaluator-Repository
Adding in the firewalls seems an unnecessary distraction.  Or, are those
evaluators also?
Also, I can guess what C is for, but that should be explained.

Lastly, I don't see the need to insult the reader in section 2.

Mike

-----Original Message-----
From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf Of
Gunnar Engelbach
Sent: Saturday, July 13, 2013 3:11 PM
To: ietfdbh
Cc: 'David Harrington'; 'Sean Turner'; sacm@ietf.org
Subject: Re: [sacm] Fwd: I-D Action:
draft-handt-sacm-alternate-architecture-00.txt


Sure.  I won't be able to get to it right away, though.




On 7/13/2013 11:16 AM, ietfdbh wrote:
> Hi Gunnar,
>
> Thanks; that's much better.
>
> I think many people will have many different approaches to their 
> architecture, but there will be quite a bit of commonality we can try 
> to extract from them.
> Would you be willing to write some text quickly describing your 
> collection, assessment, and management system, so we can add this to 
> the use-cases document?
> The more we understand how people plan to gather and assess data, and 
> turn the collected data into information that can then be used by 
> humans, the better we can design a solution to meet the needs of multiple
approaches.
>
>
> I have some questions, so I can better understand your architecture, 
> and to make sure I don't make any unwarranted assumptions.
> Working from EntitiesInUse,
> 1) Do these diagrams represent a system you have already implemented?
> 2) Has it been deployed in real-world environments?
> 3) Has it been deployed in enterprise environments? Service provider 
> environment?
> 4) What are you using for protocols between the assessment server and 
> the computer with agent?
> 5) What are you using for protocols between the assessment server and 
> the computers without agents?
> 6) When the valuator gathers data from agent-less computers, does it 
> convert the data into the same format that is used to gather data from 
> a computer with agent?
> 7) It appears the controller always talks to the evaluator, never 
> directly to the data collector. I realize this is an architectural 
> drawing, and in actual coding a direct-connect might be used to 
> performance improvements. Is the intent that the controller always goes
through the evaluator function?
> 8) when you have a subdomain, which entities in the super-domain 
> communicate directly with entities in the subdomain?
> 8a) Is this a server-to-server sharing of information?
> 8b) Can server A directly access the evaluator function in the subdomain
B?
> or does it proxy requests for evaluations via subdomain server B
controller?
> 8c) Can server A directly query the data collector in subdomain B? 
> does it us
> 9) Is it fair to assume that the Independent Workstation is equivalent 
> to a subdomain, which just happens to support only the one workstation 
> it is running on?
>
> More later ...
>
> Thanks,
> David Harrington
> ietfdbh@comcast.net
> +1-603-828-1401
>
>> -----Original Message-----
>> From: Gunnar Engelbach [mailto:Gunnar.Engelbach@ThreatGuard.com]
>> Sent: Friday, July 12, 2013 1:39 PM
>> To: ietfdbh
>> Cc: 'David Harrington'; 'Sean Turner'; sacm@ietf.org
>> Subject: Re: [sacm] Fwd: I-D Action: draft-handt-sacm-alternate- 
>> architecture-00.txt
>>
>>
>> Try these.  They're just not scalable.
>>
>>
>>
>> On 7/12/2013 12:02 PM, ietfdbh wrote:
>>> I can't read your svg files.
>>>
>>> David Harrington
>>> ietfdbh@comcast.net
>>> +1-603-828-1401
>>>
>>>> -----Original Message-----
>>>> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On 
>>>> Behalf Of Gunnar Engelbach
>>>> Sent: Friday, July 12, 2013 11:11 AM
>>>> To: David Harrington
>>>> Cc: 'Sean Turner'; sacm@ietf.org
>>>> Subject: Re: [sacm] Fwd: I-D Action: draft-handt-sacm-alternate- 
>>>> architecture-00.txt
>>>>
>>>>
>>>> I like the original.  It's only concerned with the logical 
>>>> components that
>>> make
>>>> up SACM -- the flexibility in how they are mixed and match to solve 
>>>> real problems is one of its big strengths.
>>>>
>>>> But it's also apparent that this is not being effectively communicated.
>>>>
>>>> I sent some (lousy) drawings to the mailing list a while back 
>>>> trying to
>>> capture
>>>> that flexibility -- attached here again for your
> amusement/befuddlement.
>>>>
>>>>
>>>> Do very specific use cases help people understand how these 
>>>> standards can be applied?
>>>>
>>>>
>>>> --gun
>>>>
>>>>
>>>>
>>>> On 7/12/2013 10:06 AM, David Harrington wrote:
>>>>> Hi,
>>>>>
>>>>> While I don't fully agree with the original architecture, I find 
>>>>> it
>>> easier
>>>>> to understand the intended functionality than in the alternate
>>> architecture.
>>>>>
>>>>> I understand the goal here of showing where the on-the-wire 
>>>>> protocols operate between entities.
>>>>> The data flows in the Waltermire architecture do not clearly 
>>>>> capture the on-the-wire-ness of the flows, and what sits where in the
network.
>>>>> It might be helpful to use both diagrams, combined, to show the 
>>>>> network entities and on-the-wire data flows, and then show within 
>>>>> the entity
>>>> boxes,
>>>>> the expected functionality provided by each.
>>>>>
>>>>> The new architecture seems focused on a combination firewall/IDS 
>>>>> box;
>>>> that
>>>>> seems like a particular use case.
>>>>> As you all know already, I think the scope of the sacm work needs 
>>>>> to be narrowed, but this might narrow it too much.
>>>>>
>>>>> (Sean, can you write up a firewall/IDS use case that I can put 
>>>>> into the use-cases document for this usage?)
>>>>>
>>>>> David Harrington
>>>>> dbharrington@comcast.net
>>>>> +1-603-828-1401
>>>>>
>>>>>> -----Original Message-----
>>>>>> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On 
>>>>>> Behalf
>>>> Of
>>>>>> Sean Turner
>>>>>> Sent: Thursday, July 11, 2013 12:32 PM
>>>>>> To: sacm@ietf.org
>>>>>> Subject: [sacm] Fwd: I-D Action:
>>> draft-handt-sacm-alternate-architecture-
>>>>>> 00.txt
>>>>>>
>>>>>> Food for thought.
>>>>>>
>>>>>> spt
>>>>>> -------- Original Message --------
>>>>>> Subject: I-D Action: 
>>>>>> draft-handt-sacm-alternate-architecture-00.txt
>>>>>> Date: Thu, 11 Jul 2013 09:26:58 -0700
>>>>>> From: internet-drafts@ietf.org
>>>>>> Reply-To: internet-drafts@ietf.org
>>>>>> To: i-d-announce@ietf.org
>>>>>>
>>>>>>
>>>>>> A New Internet-Draft is available from the on-line 
>>>>>> Internet-Drafts
>>>>> directories.
>>>>>>
>>>>>>
>>>>>> 	Title           : sacm: Alternate Architecture
>>>>>> 	Author(s)       : Russ Housley
>>>>>>                               Sean Turner
>>>>>> 	Filename        : draft-handt-sacm-alternate-architecture-00.txt
>>>>>> 	Pages           : 5
>>>>>> 	Date            : 2013-07-11
>>>>>>
>>>>>> Abstract:
>>>>>>        This document proposes and alternate architecture for sacm (a
>>>>>>        proposed working group at the time this draft was submitted).
>>>>>>
>>>>>>
>>>>>> The IETF datatracker status page for this draft is:
>>>>>>
>>> https://datatracker.ietf.org/doc/draft-handt-sacm-alternate-architec
>>> tu
>>> re
>>>>>>
>>>>>> There's also a htmlized version available at:
>>>>>> http://tools.ietf.org/html/draft-handt-sacm-alternate-architectur
>>>>>> e-
>>>>>> 00
>>>>>>
>>>>>>
>>>>>> Internet-Drafts are also available by anonymous FTP at:
>>>>>> ftp://ftp.ietf.org/internet-drafts/
>>>>>>
>>>>>> _______________________________________________
>>>>>> I-D-Announce mailing list
>>>>>> I-D-Announce@ietf.org
>>>>>> https://www.ietf.org/mailman/listinfo/i-d-announce
>>>>>> Internet-Draft directories: http://www.ietf.org/shadow.html or 
>>>>>> ftp://ftp.ietf.org/ietf/1shadow-sites.txt
>>>>>>
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> sacm mailing list
>>>>>> sacm@ietf.org
>>>>>> https://www.ietf.org/mailman/listinfo/sacm
>>>>>
>>>>> _______________________________________________
>>>>> sacm mailing list
>>>>> sacm@ietf.org
>>>>> https://www.ietf.org/mailman/listinfo/sacm
>>>>>
>>>
>
_______________________________________________
sacm mailing list
sacm@ietf.org
https://www.ietf.org/mailman/listinfo/sacm

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From ietfdbh@comcast.net  Mon Jul 15 11:56:58 2013
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Subject: [sacm] FW: I-D Action: draft-waltermire-sacm-use-cases-05.txt
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Hi,

I have edited the use cases draft and made substantial changes.
The changes are summarized in a Change Log near the end of the document.

The purpose and tenor of the document are now significantly different than
earlier versions.
The WG should look this over to see whether they think this is the direction
we should be going with this document.

My experience in the IETF is that "use cases" are simple English
descriptions of what a technology will be used for (or how a technology will
be used), so that readers of a use cases document can better understand the
goals of doing the work in the first place. 

Because the IETF believes in rough consensus and running code, descriptions
of existing uses of a proposed technology tend to be preferred. Vendors
often solve problems that their customers are experiencing, but each vendor
is likely to solve problems that are similar in different ways. But trends
develop, and the proprietary solutions tend to use some similarity in their
approaches. When customers deploy solutions from multiple vendors, lack of
interoperability becomes the problem.  That's when standardization is
required. So what we should be looking at is, what similar problems have
been getting addressed? And can we agree on a more standardized approach to
solving those problems? First, we need to talk about our experiences ...
I recommend you look at other "use cases" documents in the RFC series.

I think the stage we are at is to talk together and compare what we think
the problem is, and brainstorm a few ideas of what is needed (the
architecture) to solve the problems. The goal at this point is to achieve
consensus on what problems we will focus on solving, and get everybody
working in the same direction. If we all go off to solve different problems
(asset mgmt., vs config mgmt. vs vulnerability mgmt. vs firewalls vs IDS vs
NEA vs incident sharing vs ... ), we'll never get consensus on a solution.
I think the recent discussions about alternative architectures and various
asset identifiers shows clearly we do not yet have agreement on the scope of
the problems we will address.

David Harrington
ietfdbh@comcast.net
+1-603-828-1401

> -----Original Message-----
> From: i-d-announce-bounces@ietf.org [mailto:i-d-announce-
> bounces@ietf.org] On Behalf Of internet-drafts@ietf.org
> Sent: Monday, July 15, 2013 11:37 AM
> To: i-d-announce@ietf.org
> Subject: I-D Action: draft-waltermire-sacm-use-cases-05.txt
> 
> 
> A New Internet-Draft is available from the on-line Internet-Drafts
directories.
> 
> 
> 	Title           : Using Security Posture Assessment to Grant Access
to
> Enterprise Network Resources
> 	Author(s)       : David Waltermire
>                           Adam W. Montville
>                           David Harrington
> 	Filename        : draft-waltermire-sacm-use-cases-05.txt
> 	Pages           : 20
> 	Date            : 2013-07-14
> 
> Abstract:
>    This memo documents a sampling of use cases for securely aggregating
>    configuration and operational data and assessing that data to
>    determine an organization's security posture.  From these operational
>    use cases, we can derive common functional capabilities and
>    requirements to guide development of vendor-neutral, interoperable
>    standards for aggregating and assessing data relevant to security
>    posture.
> 
> 
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-waltermire-sacm-use-cases
> 
> There's also a htmlized version available at:
> http://tools.ietf.org/html/draft-waltermire-sacm-use-cases-05
> 
> A diff from the previous version is available at:
> http://www.ietf.org/rfcdiff?url2=draft-waltermire-sacm-use-cases-05
> 
> 
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
> 
> _______________________________________________
> I-D-Announce mailing list
> I-D-Announce@ietf.org
> https://www.ietf.org/mailman/listinfo/i-d-announce
> Internet-Draft directories: http://www.ietf.org/shadow.html or
> ftp://ftp.ietf.org/ietf/1shadow-sites.txt


From Adam.Montville@cisecurity.org  Mon Jul 15 11:59:02 2013
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From: Adam Montville <Adam.Montville@cisecurity.org>
To: Adam Montville <Adam.Montville@cisecurity.org>, Sean Turner <turners@ieca.com>
Thread-Topic: [sacm] Berlin Meeting
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Stealing unabashedly from Brian Trammel's awesome example over on the MILE=
 list...

If you'd like a slot to talk at the SACM WG meeting in Berlin, please let =
us know at sacm-chairs@tools.ietf.org by end of day tomorrow! =20

Topics for discussion include any document or topic covered by the recentl=
y approved charter (http://datatracker.ietf.org/wg/sacma/charter/). Priori=
ty will be given to working-group drafts and discussion of significant pro=
gress on previously presented documents.

The meeting will take place in Tiergarten 1/2 on Friday, August 7, 11:20-1=
2:20 CEST.

Regards,

Adam

> -----Original Message-----
> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf Of
> Adam Montville
> Sent: Friday, July 05, 2013 12:44 PM
> To: Sean Turner
> Cc: sacm@ietf.org
> Subject: Re: [sacm] Berlin Meeting
>=20
> NOTE: Please ignore the confidentiality notice at the bottom of this e-m=
ail
> (and others) - it is added after I hit "send" and will be removed for IE=
TF
> correspondence sometime in the next week or two.
>=20
>=20
> > -----Original Message-----
> > From: Sean Turner [mailto:turners@ieca.com]
> > Sent: Wednesday, July 03, 2013 8:53 PM
> > To: Adam Montville
> > Cc: sacm@ietf.org
> > Subject: Re: [sacm] Berlin Meeting
> >
> > On 7/3/13 12:51 PM, Adam Montville wrote:
> > > All:
> > >
> > > While we are not yet an official WG, I'd like to try to get our
> > > ducks in a row and progress as though we are a WG.  I see some
> > > important dates have passed, and that some are upcoming
> > > (http://www.ietf.org/meeting/cutoff-dates-2013.html#IETF87).
> > >
> > > Notably:
> > >
> > > * 2013-07-05 (this Friday): Final agenda published
> > > * 2013-07-15: Internet Draft submission cut-off (for all drafts,
> > > including -00)
> > > * 2013-07-17: Draft WG agendas due by UTC 24:00
> > >
> > > Given the milestones listed in our charter, it seems that our agenda=

> > > should contain a healthy dose of use case an discussion and possibly=

> > > some requirements discussion.
> > >
> > > Proposed (loose) Agenda:
> > >
>=20> > * Note well + agenda bashing
> > > * Charter and Milestone Review
> >
> > If it's chartered, then we can skip the charter review - it won't be
> > up for discussion because it'll be approved ;)
>=20
> Fair enough.  Consider the two stricken from the proposed agenda.
>=20
> >
> > Normally, I'd suggest that sessions avoid summaries of the existing dr=
afts.
> > Participants (used this word on purpose) should read the drafts
> > *before* they come to the session.  I'd actually like presenters to
> > ask before they start who has read their draft ;)
> >
> > But, being that this would be the first ever session it's probably
> > okay to present what's in them.  In the future, though we can push the=

> > work forward and get to the point by only talking about open issues.
>=20
> I would encourage everyone to read ahead even for this first session and=

> would anticipate review of these to be minimal and only for those who ma=
y
> not otherwise have heard about SACM work before Berlin.
>=20
> >
> > > * Use Case Discussion
> > >      * Review of list
> > >      * Presentation on latest draft (if update submitted)
> > > * Requirements discussion (time permitting)
> > > * Administravia (new-WG-related stuff)
> > >
> > > Are there relevant drafts that we want to discuss in Berlin and can
> > > be submitted before the 15 July deadline?  At present, the following=

> > > "related documents" show up on our Documents page
> > > (http://datatracker.ietf.org/wg/sacm/):
> > >
> > > * draft-booth-sacm-vuln-model-02
> > > * draft-waltermire-sacm-architecture-00
> > > * draft-waltermire-sacm-use-cases-04
> >
> > Ideally, all of these drafts would be updated before the meeting
> > (hint) ;)
>=20
> I am unsure as to the state of the vulnerability model and the architect=
ure
> document.  I know that David Harrington has been working on trimming up
> the use case document.
>=20
> On that note, he has asked on several occasions for some more concrete u=
se
> case examples, but I haven't really seen many provided.  It would be goo=
d
> for this community to throw a few out there.  Remember that use cases
> don't need to be comprehensive with respect to the requirements.  They
> should exemplify.
>=20
> If there are use cases treated elsewhere, but to which access is limited=
 (i.e.
> other organizations have published similar use cases but the documents
> aren't free), then I suggest that we summarize them here without simply
> referencing that work.
>=20
>=20
> >
> > > I'm looking forward to seeing you in Berlin!
> > >
> > > Regards,
> > >
> > > Adam
> > >
> > >
> > > This message and attachments may contain confidential information.
> > > If it appears that this message was sent to you by mistake, any
> > > retention, dissemination, distribution or copying of this message
> > > and attachments is strictly prohibited. Please notify the sender
> > > immediately and permanently delete the message and any attachments.
> > >
> > >
> > > _______________________________________________
> > > sacm mailing list
> > > sacm@ietf.org
> > > https://www.ietf.org/mailman/listinfo/sacm
> > >
> >
> > ...
>=20
> This message and attachments may contain confidential information.  If i=
t
> appears that this message was sent to you by mistake, any retention,
> dissemination, distribution or copying of this message and attachments i=
s
> strictly prohibited.  Please notify the sender immediately and permanent=
ly
> delete the message and any attachments.
> _______________________________________________
> sacm mailing list
> sacm@ietf.org
> https://www.ietf.org/mailman/listinfo/sacm
>=20
> ...

This message and attachments may contain confidential information.  If it =
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From dromasca@avaya.com  Mon Jul 15 12:05:19 2013
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From: "Romascanu, Dan (Dan)" <dromasca@avaya.com>
To: Adam Montville <Adam.Montville@cisecurity.org>, Sean Turner <turners@ieca.com>
Thread-Topic: [sacm] Berlin Meeting
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> The meeting will take place in Tiergarten 1/2 on Friday, August 7,
> 11:20-12:20 CEST.

Actually we have a second one hour slot scheduled 12:30-13:30. We may decid=
e to go without a break and finish earlier if so it happens, but we can pla=
n for two hours.=20

Regards,

Dan




> -----Original Message-----
> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf Of
> Adam Montville
> Sent: Monday, July 15, 2013 9:59 PM
> To: Adam Montville; Sean Turner
> Cc: sacm@ietf.org
> Subject: Re: [sacm] Berlin Meeting
>=20
> Stealing unabashedly from Brian Trammel's awesome example over on the
> MILE list...
>=20
> If you'd like a slot to talk at the SACM WG meeting in Berlin, please
> let us know at sacm-chairs@tools.ietf.org by end of day tomorrow!
>=20
> Topics for discussion include any document or topic covered by the
> recently approved charter
> (http://datatracker.ietf.org/wg/sacma/charter/). Priority will be given
> to working-group drafts and discussion of significant progress on
> previously presented documents.
>=20
> The meeting will take place in Tiergarten 1/2 on Friday, August 7,
> 11:20-12:20 CEST.
>=20
> Regards,
>=20
> Adam
>=20
> > -----Original Message-----
> > From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf
> > Of Adam Montville
> > Sent: Friday, July 05, 2013 12:44 PM
> > To: Sean Turner
> > Cc: sacm@ietf.org
> > Subject: Re: [sacm] Berlin Meeting
> >
> > NOTE: Please ignore the confidentiality notice at the bottom of this
> > e-mail (and others) - it is added after I hit "send" and will be
> > removed for IETF correspondence sometime in the next week or two.
> >
> >
> > > -----Original Message-----
> > > From: Sean Turner [mailto:turners@ieca.com]
> > > Sent: Wednesday, July 03, 2013 8:53 PM
> > > To: Adam Montville
> > > Cc: sacm@ietf.org
> > > Subject: Re: [sacm] Berlin Meeting
> > >
> > > On 7/3/13 12:51 PM, Adam Montville wrote:
> > > > All:
> > > >
> > > > While we are not yet an official WG, I'd like to try to get our
> > > > ducks in a row and progress as though we are a WG.  I see some
> > > > important dates have passed, and that some are upcoming
> > > > (http://www.ietf.org/meeting/cutoff-dates-2013.html#IETF87).
> > > >
> > > > Notably:
> > > >
> > > > * 2013-07-05 (this Friday): Final agenda published
> > > > * 2013-07-15: Internet Draft submission cut-off (for all drafts,
> > > > including -00)
> > > > * 2013-07-17: Draft WG agendas due by UTC 24:00
> > > >
> > > > Given the milestones listed in our charter, it seems that our
> > > > agenda should contain a healthy dose of use case an discussion and
> > > > possibly some requirements discussion.
> > > >
> > > > Proposed (loose) Agenda:
> > > >
> > > > * Note well + agenda bashing
> > > > * Charter and Milestone Review
> > >
> > > If it's chartered, then we can skip the charter review - it won't be
> > > up for discussion because it'll be approved ;)
> >
> > Fair enough.  Consider the two stricken from the proposed agenda.
> >
> > >
> > > Normally, I'd suggest that sessions avoid summaries of the existing
> drafts.
> > > Participants (used this word on purpose) should read the drafts
> > > *before* they come to the session.  I'd actually like presenters to
> > > ask before they start who has read their draft ;)
> > >
> > > But, being that this would be the first ever session it's probably
> > > okay to present what's in them.  In the future, though we can push
> > > the work forward and get to the point by only talking about open
> issues.
> >
> > I would encourage everyone to read ahead even for this first session
> > and would anticipate review of these to be minimal and only for those
> > who may not otherwise have heard about SACM work before Berlin.
> >
> > >
> > > > * Use Case Discussion
> > > >      * Review of list
> > > >      * Presentation on latest draft (if update submitted)
> > > > * Requirements discussion (time permitting)
> > > > * Administravia (new-WG-related stuff)
> > > >
> > > > Are there relevant drafts that we want to discuss in Berlin and
> > > > can be submitted before the 15 July deadline?  At present, the
> > > > following "related documents" show up on our Documents page
> > > > (http://datatracker.ietf.org/wg/sacm/):
> > > >
> > > > * draft-booth-sacm-vuln-model-02
> > > > * draft-waltermire-sacm-architecture-00
> > > > * draft-waltermire-sacm-use-cases-04
> > >
> > > Ideally, all of these drafts would be updated before the meeting
> > > (hint) ;)
> >
> > I am unsure as to the state of the vulnerability model and the
> > architecture document.  I know that David Harrington has been working
> > on trimming up the use case document.
> >
> > On that note, he has asked on several occasions for some more concrete
> > use case examples, but I haven't really seen many provided.  It would
> > be good for this community to throw a few out there.  Remember that
> > use cases don't need to be comprehensive with respect to the
> > requirements.  They should exemplify.
> >
> > If there are use cases treated elsewhere, but to which access is
> limited (i.e.
> > other organizations have published similar use cases but the documents
> > aren't free), then I suggest that we summarize them here without
> > simply referencing that work.
> >
> >
> > >
> > > > I'm looking forward to seeing you in Berlin!
> > > >
> > > > Regards,
> > > >
> > > > Adam
> > > >
> > > >
> > > > This message and attachments may contain confidential information.
> > > > If it appears that this message was sent to you by mistake, any
> > > > retention, dissemination, distribution or copying of this message
> > > > and attachments is strictly prohibited. Please notify the sender
> > > > immediately and permanently delete the message and any
> attachments.
> > > >
> > > >
> > > > _______________________________________________
> > > > sacm mailing list
> > > > sacm@ietf.org
> > > > https://www.ietf.org/mailman/listinfo/sacm
> > > >
> > >
> > > ...
> >
> > This message and attachments may contain confidential information.  If
> > it appears that this message was sent to you by mistake, any
> > retention, dissemination, distribution or copying of this message and
> > attachments is strictly prohibited.  Please notify the sender
> > immediately and permanently delete the message and any attachments.
> > _______________________________________________
> > sacm mailing list
> > sacm@ietf.org
> > https://www.ietf.org/mailman/listinfo/sacm
> >
> > ...
>=20
> This message and attachments may contain confidential information.  If
> it appears that this message was sent to you by mistake, any retention,
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> https://www.ietf.org/mailman/listinfo/sacm

From Adam.Montville@cisecurity.org  Mon Jul 15 13:57:00 2013
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From: Adam Montville <Adam.Montville@cisecurity.org>
To: "sacm@ietf.org" <sacm@ietf.org>
Thread-Topic: Use Case Discussion: Suspicious Endpoint Behavior
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So, the Use Case discussion has been ongoing.  David Harrington submitted =
a 05 draft (thank you!), so we have a lot to talk about.  Steve Hanna was =
going to craft some additional use cases, and I offered to help.  Here's w=
hat I've come up with after Steve asked for the assist.

It's detailed, and there's another one coming after this one...  But, I th=
ink the detail might be useful.  When I think "use case" and that we want =
to get down to brass tacks, then this is the level of detail I think about=
.  At the very least, if it is found to be too detailed, then we have esta=
blished some boundaries where we have examples of what may not be detailed=
 enough (the pre 05 versions of the use case draft) and this (and followin=
g) example for what may be too detailed.

Nevertheless, I think it's probably easier to summarize from the detail th=
an it is to derive details from the summary...



Use Case Name: Suspicious Endpoint Behavior

Description:=20
This Use Case describes the collaboration between specific participants in=
=20an information security system specific to detecting a connection attem=
pt to a known-bad Internet host by a botnet zombie that has made its way o=
nto an organization's Information Technology systems.  The primary human a=
ctor is the Security Operations Center Analyst, and the primary software a=
ctor is the configuration assessment tool.  Note, however, the dependencie=
s on other tools, such as asset management, intrusion detection, and messa=
ging.


Actors:=20

   * Security Operations Center (SOC) Analyst,=20
   * Information Security Officer,=20
   * System Owner
   * Organizational Unit Leader

Preconditions:


   * Organizational Security Policy Exists
   * Security Policy specifies appropriate asset management capabilities (=
i.e. categorization of endpoints)
   * Security Policy specifies endpoint configuration baseline for asset c=
ategorization
   * The Organization keeps a list of known-bad Internet hosts
   * The Organization associates owners who are individuals with endpoints=

   * The Organization associates organizational units with endpoints

Postconditions:

   * Endpoint configuration has been assessed [1]
   * Results have been conveyed to scan requester

Primary Path:

  1. At 03:46 UTC an organization's Network Intrusion Detection System (NI=
DS) sees an IP packet with a destination IPv6 address existing on a blackl=
ist of known botnet command and control (C2) servers.

  2. The NIDS sends an alert to the SOC Analyst.

  3. The SOC Analyst uses the information captured in the alert (IP packet=
 and reason for the flag) to look up the endpoint in the organization's as=
set inventory system and discovers that the endpoint is a Windows Server 2=
008 R2 Member Server playing the role of a File Server

  4. The SOC Analyst also verifies that the IPv6 address cited by the NIDS=
 is, in fact, on the blacklist for known C2 servers.

  5. At this point, the SOC Analyst switches over to the organization's co=
nfiguration assessment tool

  6. The SOC Analyst locates the offending endpoint in the configuration a=
ssessment tool's endpoint catalog [2]

  7. The SOC Analyst then initiates an immediate and complete endpoint ass=
essment to determine if the endpoint has experienced any configuration dri=
ft [3].

  8. The configuration assessment tool:

  9.=20
    a. Performs a preliminary asset inventory scan on the offending endpoi=
nt, which results in a list of installed software [4][5]
    b. Performs a comparison between the last known asset inventory and th=
e present asset inventory and notes any differences
    c. Searches it's local content repository for appropriate configuratio=
n baselines for the operating system of the offending endpoint and for eac=
h installed piece of software
    d. Upon aggregating the set of applicable configuration baselines, the=
 configuration assessment tool then connects to and queries the organizati=
on's configuration content repository for newer baselines that may exist.
    e. If a new baseline exists, then it is returned by the configuration =
content repository.

  10. The configuration management tool, having the set of updated baselin=
es, initiates a scan against the offending host, which yields a result set=
.

  11. The configuration management tool displays scan results to the SOC A=
nalyst, which show that three new pieces of software have been installed o=
n the offending endpoint where one piece of software is not on the authori=
zed software list, and that several configuration items were out of compli=
ance with the organization's established baselines.

  12. The SOC Analyst reviews the information for accuracy and to plan nex=
t steps before sending the report to the responsible Information Security =
Officer, accountable System Owner, and the Organizational Unit Leader.


A Note On Alternative Paths, Preconditions, and Postconditions:
There are likely to be many points of optimization and optional paths.  Fo=
r example, a configuration assessment tool might provide a "quick glance" =
look at the most recent scan history for the offending endpoint.  A SOC An=
alyst might then elect not to run a new scan (i.e. the offending endpoint =
is known to be out of compliance, so why run a new scan?).  Another point =
might be that the offending endpoint is, at present, not authorized to be =
on the network, in which case it is very likely not to exist in the config=
uration assessment tool's endpoint catalog.


As with alternative paths, pre-/post-conditions can vary widely.  Consider=
 that this description likely represents an organization on the mature sid=
e of managing information security.  Many organizations do not have a Secu=
rity Operations Center, nor do they necessarily monitor their network.  It=
 may be the case that a log management process has detected the blackliste=
d connection attempt  through audit trail monitoring.  Or, it may be the c=
ase that a shared indicator of compromise has been used to detect the offe=
nding endpoint.


-------------------
[1] I am assuming at this point that "configuration assessment" has been d=
efined and will be understood by the reader.  What I consider to be "asses=
sment" is that the baseline has been obtained, send to the scanning implem=
entation, endpoint configuration item values have been harvested, endpoint=
 configuration item values have been compared against baseline, and result=
s stored/forwarded as appropriate for the use case.


[2] An "endpoint catalog" is intended to convey nothing more than the noti=
on that configuration assessment tools are likely to have some method of l=
isting, enumerating, or aggregating endpoints under configuration manageme=
nt.=20


[3] It may not be necessary to specify what we mean by "complete" or the o=
rder in which scanning operations take place.  In this particular scenario=
, I thought it might be useful to illustrate that "scan levels" exist on a=
 continuum. =20


[4] Remember that the configuration assessment tool has knowledge of the o=
ffending endpoint so running a preliminary inventory scan is reasonable at=
 this point.


[5] The mechanism of scan could be agent-based or remote, so details of ho=
w a scan happens are omitted here.  A more granular partition of the proce=
ss is required for further details.

This message and attachments may contain confidential information.  If it =
appears that this message was sent to you by mistake, any retention, disse=
mination, distribution or copying of this message and attachments is stric=
tly prohibited.  Please notify the sender immediately and permanently dele=
te the message and any attachments.

From turners@ieca.com  Mon Jul 15 13:57:59 2013
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Subject: Re: [sacm] Berlin Meeting
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On 7/15/13 2:58 PM, Adam Montville wrote:
> Stealing unabashedly from Brian Trammel's awesome example over on the MILE list...
>
> If you'd like a slot to talk at the SACM WG meeting in Berlin, please let us know at sacm-chairs@tools.ietf.org by end of day tomorrow!
>
> Topics for discussion include any document or topic covered by the recently approved charter (http://datatracker.ietf.org/wg/sacma/charter/). Priority will be given to working-group drafts and discussion of significant progress on previously presented documents.

https://datatracker.ietf.org/wg/sacm/charter/ ;)

> The meeting will take place in Tiergarten 1/2 on Friday, August 7, 11:20-12:20 CEST.
>
> Regards,
>
> Adam
>
>> -----Original Message-----
>> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf Of
>> Adam Montville
>> Sent: Friday, July 05, 2013 12:44 PM
>> To: Sean Turner
>> Cc: sacm@ietf.org
>> Subject: Re: [sacm] Berlin Meeting
>>
>> NOTE: Please ignore the confidentiality notice at the bottom of this e-mail
>> (and others) - it is added after I hit "send" and will be removed for IETF
>> correspondence sometime in the next week or two.
>>
>>
>>> -----Original Message-----
>>> From: Sean Turner [mailto:turners@ieca.com]
>>> Sent: Wednesday, July 03, 2013 8:53 PM
>>> To: Adam Montville
>>> Cc: sacm@ietf.org
>>> Subject: Re: [sacm] Berlin Meeting
>>>
>>> On 7/3/13 12:51 PM, Adam Montville wrote:
>>>> All:
>>>>
>>>> While we are not yet an official WG, I'd like to try to get our
>>>> ducks in a row and progress as though we are a WG.  I see some
>>>> important dates have passed, and that some are upcoming
>>>> (http://www.ietf.org/meeting/cutoff-dates-2013.html#IETF87).
>>>>
>>>> Notably:
>>>>
>>>> * 2013-07-05 (this Friday): Final agenda published
>>>> * 2013-07-15: Internet Draft submission cut-off (for all drafts,
>>>> including -00)
>>>> * 2013-07-17: Draft WG agendas due by UTC 24:00
>>>>
>>>> Given the milestones listed in our charter, it seems that our agenda
>>>> should contain a healthy dose of use case an discussion and possibly
>>>> some requirements discussion.
>>>>
>>>> Proposed (loose) Agenda:
>>>>
>>>> * Note well + agenda bashing
>>>> * Charter and Milestone Review
>>>
>>> If it's chartered, then we can skip the charter review - it won't be
>>> up for discussion because it'll be approved ;)
>>
>> Fair enough.  Consider the two stricken from the proposed agenda.
>>
>>>
>>> Normally, I'd suggest that sessions avoid summaries of the existing drafts.
>>> Participants (used this word on purpose) should read the drafts
>>> *before* they come to the session.  I'd actually like presenters to
>>> ask before they start who has read their draft ;)
>>>
>>> But, being that this would be the first ever session it's probably
>>> okay to present what's in them.  In the future, though we can push the
>>> work forward and get to the point by only talking about open issues.
>>
>> I would encourage everyone to read ahead even for this first session and
>> would anticipate review of these to be minimal and only for those who may
>> not otherwise have heard about SACM work before Berlin.
>>
>>>
>>>> * Use Case Discussion
>>>>       * Review of list
>>>>       * Presentation on latest draft (if update submitted)
>>>> * Requirements discussion (time permitting)
>>>> * Administravia (new-WG-related stuff)
>>>>
>>>> Are there relevant drafts that we want to discuss in Berlin and can
>>>> be submitted before the 15 July deadline?  At present, the following
>>>> "related documents" show up on our Documents page
>>>> (http://datatracker.ietf.org/wg/sacm/):
>>>>
>>>> * draft-booth-sacm-vuln-model-02
>>>> * draft-waltermire-sacm-architecture-00
>>>> * draft-waltermire-sacm-use-cases-04
>>>
>>> Ideally, all of these drafts would be updated before the meeting
>>> (hint) ;)
>>
>> I am unsure as to the state of the vulnerability model and the architecture
>> document.  I know that David Harrington has been working on trimming up
>> the use case document.
>>
>> On that note, he has asked on several occasions for some more concrete use
>> case examples, but I haven't really seen many provided.  It would be good
>> for this community to throw a few out there.  Remember that use cases
>> don't need to be comprehensive with respect to the requirements.  They
>> should exemplify.
>>
>> If there are use cases treated elsewhere, but to which access is limited (i.e.
>> other organizations have published similar use cases but the documents
>> aren't free), then I suggest that we summarize them here without simply
>> referencing that work.
>>
>>
>>>
>>>> I'm looking forward to seeing you in Berlin!
>>>>
>>>> Regards,
>>>>
>>>> Adam
>>>>
>>>>
>>>> This message and attachments may contain confidential information.
>>>> If it appears that this message was sent to you by mistake, any
>>>> retention, dissemination, distribution or copying of this message
>>>> and attachments is strictly prohibited. Please notify the sender
>>>> immediately and permanently delete the message and any attachments.
>>>>
>>>>
>>>> _______________________________________________
>>>> sacm mailing list
>>>> sacm@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/sacm
>>>>
>>>
>>> ...
>>
>> This message and attachments may contain confidential information.  If it
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>> https://www.ietf.org/mailman/listinfo/sacm
>>
>> ...
>
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From Adam.Montville@cisecurity.org  Mon Jul 15 13:58:47 2013
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From: Adam Montville <Adam.Montville@cisecurity.org>
To: "sacm@ietf.org" <sacm@ietf.org>
Thread-Topic: Use Case Discussion: Vulnerable Endpoint Identification
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And another...


Use Case Name: Vulnerable Endpoint Identification

Description:=20
In this use case a zero-day exploit has been discovered in the wild, which=
 is followed by a vulnerability identification entry and indicators of com=
promise.  A security engineer is responsible for that portion of a situati=
onal response process that determines how exposed an organization is given=
 the new state of the world.


Actors:=20

   * System Administrator
   * Vulnerability Engineer
   * Security Engineer
   * System Owner
   * Information Owner


Preconditions:

   * Organizational Security Policy exists
   * Security Policy specifies appropriate asset management capabilities (=
i.e. categorization of endpoints)
   * Security Policy specifies endpoint configuration baseline for asset c=
ategorization
   * Security Policy specifies configuration history retention requirement=
s
   * The Organization associates owners who are individuals with endpoints=

   * The Organization associates organizational units with endpoints

Postconditions:

   * Appropriate individuals in the organization have a clear understandin=
g of the organization's exposure to and potential impact of the identified=
 0-day
   * Appropriate individuals are taking action to further assess or mitiga=
te the organization's posture regarding this 0-day


Primary Path:=20


  1. [External] 0-day exploit discovery [1]

  2. Vulnerability Identification (Vulnerability ID) issued and associated=
 information published to an accessible content repository [2]

  3. Indicators of Compromise (IoC) are identified and published to an acc=
essible content repository [3]

  4. Security engineer provides the Vulnerability ID to the Asset Manageme=
nt System

  5. The Asset Management System queries a configured Vulnerability Databa=
se to obtain a list of affected endpoint classes [4]

  6. The Asset Management System returns a list of specific endpoints that=
 can be classified according to the endpoint class list obtained in Step 5=
, which either:

  7.=20
    a. Presently have affected software installed, or
    b. Have had affected software installed.

  8. The Security Engineer exports the list of potentially affected endpoi=
nts

  9. The Security Engineer initiates a vulnerability scan based on IoCs, p=
ublished vulnerability information, and the potentially affected endpoint =
list.

  10. The Vulnerability Scanner derives a set of vulnerability checks (i.e=
. assessments) to perform on each listed endpoint based on information ass=
ociated with the provided Vulnerability ID and IoCs.

  11. The Vulnerability Scanner executes the check on each of the potentia=
lly affected hosts which will return results effectively equivalent to "is=
 vulnerable," "is not vulnerable," "not checked," or "error" [5].

  12. The Security Engineer reviews the report then generates three additi=
onal reports:

  13.=20
    a. The first report provides summary information for the Information S=
ecurity Manager and/or higher levels of organizational management as appro=
priate (i.e. Chief Information Security Officer)
    b. The second report is a list of all potentially effected endpoints f=
or which no definitive answer could be obtained by the Vulnerability Scann=
er (i.e. those endpoints for which neither an "is vulnerable" nor "is not =
vulnerable" result is available)
    c. The third report is a list of all effected endpoints (i.e. those en=
dpoints for which the checks resulted in "is vulnerable").

  14. The Security Engineer sends the first report to responsible Informat=
ion Security Manager(s) using relationships tracked by the Asset Managemen=
t System

  15. The Security Engineer sends the second report to responsible Vulnera=
bility Engineer(s) using relationships tracked by the Asset Management Sys=
tem

  16. The Security Engineer sends the third report to responsible System A=
dministrator(s) using relationships tracked by the Asset Management System=


  17. The Security Engineer issues an alert to affected System Owners, Inf=
ormation Owners, and System Administrators using relationships tracked by =
the Asset Management System


A Note On Alternative Paths, Preconditions, and Postconditions:
There are likely to be many points of optimization and optional paths pert=
aining to this Use Case.  For example, there may be greater degrees of int=
eroperability between tools in a given organization, which would advance t=
he state of automation in the "primary path" description herein provided. =
=20


As with alternative paths, pre-/post-conditions can vary widely.  Consider=
 that this description likely represents an organization on the mature sid=
e of managing information security.  Most organizations are unlikely to ha=
ve separate roles for Security Engineer and Vulnerability Engineer, for ex=
ample. =20


--------------
[1] The "[External]" notation is used to indicate that, while this step is=
 included in the primary path, it is out of the organization's locus of co=
ntrol (i.e. the step is provided for additional context in the path throug=
h the use case rather than being placed in the pre-conditions).


[2] An "accessible" content repository may be internal or external.  An in=
ternal content repository may be a replication of an external content repo=
sitory.


[3] Often, an indicator of compromise involves assessing the state of some=
 observable object on the endpoint.  For example, an indicator of compromi=
se might be that a particular file path exists, a particular setting is co=
nfigured in a specific manner, a set of settings are configured in a speci=
fic manner, and/or specific log entries exist.

[4] The Vulnerability Database may be combined with the content repository=
, but is being called out separately here to assure that the reader knows =
which type of data is being queried.

[5] It is likely that additional result types will be required to convey d=
ifferent reasons a result may not be available.

This message and attachments may contain confidential information.  If it =
appears that this message was sent to you by mistake, any retention, disse=
mination, distribution or copying of this message and attachments is stric=
tly prohibited.  Please notify the sender immediately and permanently dele=
te the message and any attachments.

From turners@ieca.com  Mon Jul 15 14:15:02 2013
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Subject: Re: [sacm] Fwd: I-D Action:	draft-handt-sacm-alternate-architecture-00.txt
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On 7/12/13 10:06 AM, David Harrington wrote:
> Hi,
>
> While I don't fully agree with the original architecture, I find it easier
> to understand the intended functionality than in the alternate architecture.
>
> I understand the goal here of showing where the on-the-wire protocols
> operate between entities.
> The data flows in the Waltermire architecture do not clearly capture the
> on-the-wire-ness of the flows, and what sits where in the network.
> It might be helpful to use both diagrams, combined, to show the network
> entities and on-the-wire data flows, and then show within the entity boxes,
> the expected functionality provided by each.

I could see using both some people like functional architectures some 
people like the more box + protocol architectures.  Sometimes showing 
how one applies to other helps everybody get on the same page.  That was 
my goal.  Maybe it would have been better title additional architectural 
views.

> The new architecture seems focused on a combination firewall/IDS box; that
> seems like a particular use case.

I figured (and stand ready to be corrected) that what we have is an 
asset, one or more evalators, one or more sensors, and ...

> As you all know already, I think the scope of the sacm work needs to be
> narrowed, but this might narrow it too much.
>
> (Sean, can you write up a firewall/IDS use case that I can put into the
> use-cases document for this usage?)

No worries I'll provide something.

spt

> David Harrington
> dbharrington@comcast.net
> +1-603-828-1401
>
>> -----Original Message-----
>> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf Of
>> Sean Turner
>> Sent: Thursday, July 11, 2013 12:32 PM
>> To: sacm@ietf.org
>> Subject: [sacm] Fwd: I-D Action: draft-handt-sacm-alternate-architecture-
>> 00.txt
>>
>> Food for thought.
>>
>> spt
>> -------- Original Message --------
>> Subject: I-D Action: draft-handt-sacm-alternate-architecture-00.txt
>> Date: Thu, 11 Jul 2013 09:26:58 -0700
>> From: internet-drafts@ietf.org
>> Reply-To: internet-drafts@ietf.org
>> To: i-d-announce@ietf.org
>>
>>
>> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
>>
>>
>> 	Title           : sacm: Alternate Architecture
>> 	Author(s)       : Russ Housley
>>                             Sean Turner
>> 	Filename        : draft-handt-sacm-alternate-architecture-00.txt
>> 	Pages           : 5
>> 	Date            : 2013-07-11
>>
>> Abstract:
>>      This document proposes and alternate architecture for sacm (a
>>      proposed working group at the time this draft was submitted).
>>
>>
>> The IETF datatracker status page for this draft is:
>> https://datatracker.ietf.org/doc/draft-handt-sacm-alternate-architecture
>>
>> There's also a htmlized version available at:
>> http://tools.ietf.org/html/draft-handt-sacm-alternate-architecture-00
>>
>>
>> Internet-Drafts are also available by anonymous FTP at:
>> ftp://ftp.ietf.org/internet-drafts/
>>
>> _______________________________________________
>> I-D-Announce mailing list
>> I-D-Announce@ietf.org
>> https://www.ietf.org/mailman/listinfo/i-d-announce
>> Internet-Draft directories: http://www.ietf.org/shadow.html
>> or ftp://ftp.ietf.org/ietf/1shadow-sites.txt
>>
>>
>>
>> _______________________________________________
>> sacm mailing list
>> sacm@ietf.org
>> https://www.ietf.org/mailman/listinfo/sacm
>
> _______________________________________________
> sacm mailing list
> sacm@ietf.org
> https://www.ietf.org/mailman/listinfo/sacm
>

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Subject: Re: [sacm] Fwd: I-D Action: draft-handt-sacm-alternate-architecture-00.txt
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On 7/15/13 12:03 PM, Michael Hammer wrote:
> Re: alternate architecture.
>
> If you don't understand why using logical functional elements is better than
> somebody's restrictive physical implementation, you will before long.
> Having been through a couple SDO's where weeks were wasted while one vendor
> tried to force others to adopt their implementation, I have no wish to
> repeat that.

Mike,

Definitely stand ready to be corrected - seriously.  I'm just looking at 
protocols and what flows where.

> The big take-away I got from this alternate diagram was that you wanted the
> evaluator to directly access the sensor (asset) and prohibit other means of
> accessing the repository.

That part, I have to admit wasn't fully baked.  I could see that one 
might restrict access to the repository but with proper 
authentication/access control that's probably not necessary.  In fact, 
it might be a bad idea because it might slow things down.

> I have to wonder is that is as scalable as the original architecture.
> Your simplified architecture would simply be:  Sensor-Evaluator-Repository
> Adding in the firewalls seems an unnecessary distraction.  Or, are those
> evaluators also?

I was thinking the BPDs would evaluators/sensors.  I don't think the 
evaluator would be looking at all the traffic as it flows out of the 
asset.  There might be something on the asset that says hey this assets 
starting to act funny, but I would always think there would be a 
backstop at enterprise boundary that would also want to check that the 
asset is acting like it's supposed to be.

> Also, I can guess what C is for, but that should be explained.

Definitely need to explain that more and am hoping to have some more in 
the -03 draft.

> Lastly, I don't see the need to insult the reader in section 2.

Point taken.  Apologies and it's removed.

spt

> Mike
>
> -----Original Message-----
> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf Of
> Gunnar Engelbach
> Sent: Saturday, July 13, 2013 3:11 PM
> To: ietfdbh
> Cc: 'David Harrington'; 'Sean Turner'; sacm@ietf.org
> Subject: Re: [sacm] Fwd: I-D Action:
> draft-handt-sacm-alternate-architecture-00.txt
>
>
> Sure.  I won't be able to get to it right away, though.
>
>
>
>
> On 7/13/2013 11:16 AM, ietfdbh wrote:
>> Hi Gunnar,
>>
>> Thanks; that's much better.
>>
>> I think many people will have many different approaches to their
>> architecture, but there will be quite a bit of commonality we can try
>> to extract from them.
>> Would you be willing to write some text quickly describing your
>> collection, assessment, and management system, so we can add this to
>> the use-cases document?
>> The more we understand how people plan to gather and assess data, and
>> turn the collected data into information that can then be used by
>> humans, the better we can design a solution to meet the needs of multiple
> approaches.
>>
>>
>> I have some questions, so I can better understand your architecture,
>> and to make sure I don't make any unwarranted assumptions.
>> Working from EntitiesInUse,
>> 1) Do these diagrams represent a system you have already implemented?
>> 2) Has it been deployed in real-world environments?
>> 3) Has it been deployed in enterprise environments? Service provider
>> environment?
>> 4) What are you using for protocols between the assessment server and
>> the computer with agent?
>> 5) What are you using for protocols between the assessment server and
>> the computers without agents?
>> 6) When the valuator gathers data from agent-less computers, does it
>> convert the data into the same format that is used to gather data from
>> a computer with agent?
>> 7) It appears the controller always talks to the evaluator, never
>> directly to the data collector. I realize this is an architectural
>> drawing, and in actual coding a direct-connect might be used to
>> performance improvements. Is the intent that the controller always goes
> through the evaluator function?
>> 8) when you have a subdomain, which entities in the super-domain
>> communicate directly with entities in the subdomain?
>> 8a) Is this a server-to-server sharing of information?
>> 8b) Can server A directly access the evaluator function in the subdomain
> B?
>> or does it proxy requests for evaluations via subdomain server B
> controller?
>> 8c) Can server A directly query the data collector in subdomain B?
>> does it us
>> 9) Is it fair to assume that the Independent Workstation is equivalent
>> to a subdomain, which just happens to support only the one workstation
>> it is running on?
>>
>> More later ...
>>
>> Thanks,
>> David Harrington
>> ietfdbh@comcast.net
>> +1-603-828-1401
>>
>>> -----Original Message-----
>>> From: Gunnar Engelbach [mailto:Gunnar.Engelbach@ThreatGuard.com]
>>> Sent: Friday, July 12, 2013 1:39 PM
>>> To: ietfdbh
>>> Cc: 'David Harrington'; 'Sean Turner'; sacm@ietf.org
>>> Subject: Re: [sacm] Fwd: I-D Action: draft-handt-sacm-alternate-
>>> architecture-00.txt
>>>
>>>
>>> Try these.  They're just not scalable.
>>>
>>>
>>>
>>> On 7/12/2013 12:02 PM, ietfdbh wrote:
>>>> I can't read your svg files.
>>>>
>>>> David Harrington
>>>> ietfdbh@comcast.net
>>>> +1-603-828-1401
>>>>
>>>>> -----Original Message-----
>>>>> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On
>>>>> Behalf Of Gunnar Engelbach
>>>>> Sent: Friday, July 12, 2013 11:11 AM
>>>>> To: David Harrington
>>>>> Cc: 'Sean Turner'; sacm@ietf.org
>>>>> Subject: Re: [sacm] Fwd: I-D Action: draft-handt-sacm-alternate-
>>>>> architecture-00.txt
>>>>>
>>>>>
>>>>> I like the original.  It's only concerned with the logical
>>>>> components that
>>>> make
>>>>> up SACM -- the flexibility in how they are mixed and match to solve
>>>>> real problems is one of its big strengths.
>>>>>
>>>>> But it's also apparent that this is not being effectively communicated.
>>>>>
>>>>> I sent some (lousy) drawings to the mailing list a while back
>>>>> trying to
>>>> capture
>>>>> that flexibility -- attached here again for your
>> amusement/befuddlement.
>>>>>
>>>>>
>>>>> Do very specific use cases help people understand how these
>>>>> standards can be applied?
>>>>>
>>>>>
>>>>> --gun
>>>>>
>>>>>
>>>>>
>>>>> On 7/12/2013 10:06 AM, David Harrington wrote:
>>>>>> Hi,
>>>>>>
>>>>>> While I don't fully agree with the original architecture, I find
>>>>>> it
>>>> easier
>>>>>> to understand the intended functionality than in the alternate
>>>> architecture.
>>>>>>
>>>>>> I understand the goal here of showing where the on-the-wire
>>>>>> protocols operate between entities.
>>>>>> The data flows in the Waltermire architecture do not clearly
>>>>>> capture the on-the-wire-ness of the flows, and what sits where in the
> network.
>>>>>> It might be helpful to use both diagrams, combined, to show the
>>>>>> network entities and on-the-wire data flows, and then show within
>>>>>> the entity
>>>>> boxes,
>>>>>> the expected functionality provided by each.
>>>>>>
>>>>>> The new architecture seems focused on a combination firewall/IDS
>>>>>> box;
>>>>> that
>>>>>> seems like a particular use case.
>>>>>> As you all know already, I think the scope of the sacm work needs
>>>>>> to be narrowed, but this might narrow it too much.
>>>>>>
>>>>>> (Sean, can you write up a firewall/IDS use case that I can put
>>>>>> into the use-cases document for this usage?)
>>>>>>
>>>>>> David Harrington
>>>>>> dbharrington@comcast.net
>>>>>> +1-603-828-1401
>>>>>>
>>>>>>> -----Original Message-----
>>>>>>> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On
>>>>>>> Behalf
>>>>> Of
>>>>>>> Sean Turner
>>>>>>> Sent: Thursday, July 11, 2013 12:32 PM
>>>>>>> To: sacm@ietf.org
>>>>>>> Subject: [sacm] Fwd: I-D Action:
>>>> draft-handt-sacm-alternate-architecture-
>>>>>>> 00.txt
>>>>>>>
>>>>>>> Food for thought.
>>>>>>>
>>>>>>> spt
>>>>>>> -------- Original Message --------
>>>>>>> Subject: I-D Action:
>>>>>>> draft-handt-sacm-alternate-architecture-00.txt
>>>>>>> Date: Thu, 11 Jul 2013 09:26:58 -0700
>>>>>>> From: internet-drafts@ietf.org
>>>>>>> Reply-To: internet-drafts@ietf.org
>>>>>>> To: i-d-announce@ietf.org
>>>>>>>
>>>>>>>
>>>>>>> A New Internet-Draft is available from the on-line
>>>>>>> Internet-Drafts
>>>>>> directories.
>>>>>>>
>>>>>>>
>>>>>>> 	Title           : sacm: Alternate Architecture
>>>>>>> 	Author(s)       : Russ Housley
>>>>>>>                                Sean Turner
>>>>>>> 	Filename        : draft-handt-sacm-alternate-architecture-00.txt
>>>>>>> 	Pages           : 5
>>>>>>> 	Date            : 2013-07-11
>>>>>>>
>>>>>>> Abstract:
>>>>>>>         This document proposes and alternate architecture for sacm (a
>>>>>>>         proposed working group at the time this draft was submitted).
>>>>>>>
>>>>>>>
>>>>>>> The IETF datatracker status page for this draft is:
>>>>>>>
>>>> https://datatracker.ietf.org/doc/draft-handt-sacm-alternate-architec
>>>> tu
>>>> re
>>>>>>>
>>>>>>> There's also a htmlized version available at:
>>>>>>> http://tools.ietf.org/html/draft-handt-sacm-alternate-architectur
>>>>>>> e-
>>>>>>> 00
>>>>>>>
>>>>>>>
>>>>>>> Internet-Drafts are also available by anonymous FTP at:
>>>>>>> ftp://ftp.ietf.org/internet-drafts/
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> I-D-Announce mailing list
>>>>>>> I-D-Announce@ietf.org
>>>>>>> https://www.ietf.org/mailman/listinfo/i-d-announce
>>>>>>> Internet-Draft directories: http://www.ietf.org/shadow.html or
>>>>>>> ftp://ftp.ietf.org/ietf/1shadow-sites.txt
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> sacm mailing list
>>>>>>> sacm@ietf.org
>>>>>>> https://www.ietf.org/mailman/listinfo/sacm
>>>>>>
>>>>>> _______________________________________________
>>>>>> sacm mailing list
>>>>>> sacm@ietf.org
>>>>>> https://www.ietf.org/mailman/listinfo/sacm
>>>>>>
>>>>
>>
> _______________________________________________
> sacm mailing list
> sacm@ietf.org
> https://www.ietf.org/mailman/listinfo/sacm
>

From ietfdbh@comcast.net  Mon Jul 15 14:59:41 2013
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Subject: Re: [sacm] Fwd: I-D Action:	draft-handt-sacm-alternate-architecture-00.txt
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Hi,

I like Gunnar's pictures better  - not just cause they're prettier ;-) but
because they mix the functional approach of the Waltermire architecture and
the physical separation of the Turner/Housley architecture.

s/ For those not in the know, it makes more sense to/Some people prefer to/

In the text it says " Lines marked A, flowing from the asset to the
Evaluator,"
However, in figure 2, lines marked A are drawn as being bi-directional. I
recommend removing the arrows going into the asset boxes.

In the text, it says " Lines marked B, flowing from the client to the BPD",
but there are no boxes labeled "client", and the lines marked B also appear
to be bi-directional in the diagram. 
The lines marked B flow between the asset and the BPD. I guess I'm confused
because you are mixing NEA terminology with the sacm terminology, and it's
not clear to me where the NEA client server are in the diagram.
The text says "The asset has an NEA client" and "the evaluator has an NEA
server", but then you put lines marked B between the asset and the BPD.

Then you go on to talk about doing NEA assessment before access, and
monitoring after, which seems to be a whole different issue -temporal
dataflows - than the actual boxes and protocols dataflows. This temporal
dataflow seems better represented by a waltermire dataflow loop of
DF2/DF1/DF2. 

The text says "   Lines marked C, flowing from the BPD to the (Evaluator or
   Repository?) ensure that the BPDs know how the asset are supposed to
   be acting."
So your combination of evaluator and repository also act as the policy
server?
In much of the discussions I have been in over the years about policy-based
management and policy-based access control, we often talk about a policy
decision point (PDP), where it is decided which policy applies to the asset,
and a policy enforcement point (PEP), which enforces the policy. So if I
were to use the terminology I am used to in describing your  architecture,
the evaluator/repository would be the PDP, and the BPD would be a PEP? [see
RFC3198 " Terminology for Policy-Based Management"]

David Harrington
ietfdbh@comcast.net
+1-603-828-1401

> -----Original Message-----
> From: Sean Turner [mailto:turners@ieca.com]
> Sent: Monday, July 15, 2013 5:15 PM
> To: David Harrington
> Cc: sacm@ietf.org
> Subject: Re: [sacm] Fwd: I-D Action: draft-handt-sacm-alternate-
> architecture-00.txt
> 
> On 7/12/13 10:06 AM, David Harrington wrote:
> > Hi,
> >
> > While I don't fully agree with the original architecture, I find it
> > easier to understand the intended functionality than in the alternate
> architecture.
> >
> > I understand the goal here of showing where the on-the-wire protocols
> > operate between entities.
> > The data flows in the Waltermire architecture do not clearly capture
> > the on-the-wire-ness of the flows, and what sits where in the network.
> > It might be helpful to use both diagrams, combined, to show the
> > network entities and on-the-wire data flows, and then show within the
> > entity boxes, the expected functionality provided by each.
> 
> I could see using both some people like functional architectures some
people
> like the more box + protocol architectures.  Sometimes showing how one
> applies to other helps everybody get on the same page.  That was my goal.
> Maybe it would have been better title additional architectural views.
> 
> > The new architecture seems focused on a combination firewall/IDS box;
> > that seems like a particular use case.
> 
> I figured (and stand ready to be corrected) that what we have is an asset,
> one or more evalators, one or more sensors, and ...
> 
> > As you all know already, I think the scope of the sacm work needs to
> > be narrowed, but this might narrow it too much.
> >
> > (Sean, can you write up a firewall/IDS use case that I can put into
> > the use-cases document for this usage?)
> 
> No worries I'll provide something.
> 
> spt
> 
> > David Harrington
> > dbharrington@comcast.net
> > +1-603-828-1401
> >
> >> -----Original Message-----
> >> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf
> >> Of Sean Turner
> >> Sent: Thursday, July 11, 2013 12:32 PM
> >> To: sacm@ietf.org
> >> Subject: [sacm] Fwd: I-D Action:
> >> draft-handt-sacm-alternate-architecture-
> >> 00.txt
> >>
> >> Food for thought.
> >>
> >> spt
> >> -------- Original Message --------
> >> Subject: I-D Action: draft-handt-sacm-alternate-architecture-00.txt
> >> Date: Thu, 11 Jul 2013 09:26:58 -0700
> >> From: internet-drafts@ietf.org
> >> Reply-To: internet-drafts@ietf.org
> >> To: i-d-announce@ietf.org
> >>
> >>
> >> A New Internet-Draft is available from the on-line Internet-Drafts
> > directories.
> >>
> >>
> >> 	Title           : sacm: Alternate Architecture
> >> 	Author(s)       : Russ Housley
> >>                             Sean Turner
> >> 	Filename        : draft-handt-sacm-alternate-architecture-00.txt
> >> 	Pages           : 5
> >> 	Date            : 2013-07-11
> >>
> >> Abstract:
> >>      This document proposes and alternate architecture for sacm (a
> >>      proposed working group at the time this draft was submitted).
> >>
> >>
> >> The IETF datatracker status page for this draft is:
> >> https://datatracker.ietf.org/doc/draft-handt-sacm-alternate-architect
> >> ure
> >>
> >> There's also a htmlized version available at:
> >> http://tools.ietf.org/html/draft-handt-sacm-alternate-architecture-00
> >>
> >>
> >> Internet-Drafts are also available by anonymous FTP at:
> >> ftp://ftp.ietf.org/internet-drafts/
> >>
> >> _______________________________________________
> >> I-D-Announce mailing list
> >> I-D-Announce@ietf.org
> >> https://www.ietf.org/mailman/listinfo/i-d-announce
> >> Internet-Draft directories: http://www.ietf.org/shadow.html or
> >> ftp://ftp.ietf.org/ietf/1shadow-sites.txt
> >>
> >>
> >>
> >> _______________________________________________
> >> sacm mailing list
> >> sacm@ietf.org
> >> https://www.ietf.org/mailman/listinfo/sacm
> >
> > _______________________________________________
> > sacm mailing list
> > sacm@ietf.org
> > https://www.ietf.org/mailman/listinfo/sacm
> >


From ietfdbh@comcast.net  Mon Jul 15 15:35:06 2013
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From: "ietfdbh" <ietfdbh@comcast.net>
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Date: Mon, 15 Jul 2013 18:33:48 -0400
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Subject: [sacm] use cases versus requirements
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Hi,

I looked up the BOF summaries from November and March.
The summary from November says " The consensus was to start from
requirements and then develop an architecture to explain how the use cases
can be met.  The group has a fairly good understanding of the problem space,
but needs to document this and present it more clearly with the
requirements, then the architecture.  These steps need to happen to progress
the work."  Are we paying enough attention to the requirements stage? We
don't have a requirements doc, and that might be helpful.

The summary is unclear about which comes first - use cases or requirements.

The -04- version of use cases had very high-level uses cases, and then
defined concepts and requirements from the three abstract use cases, in a
top-down approach that led to organizing the document by (theoretical)
requirements and then finding use cases as supporting examples of the
requirements. As I mentioned in my previous email, I think we should be
working in the IETF bottom-up approach, looking at multiple real-world
implementation/deployment use cases and deriving requirements from the
aggregation of use cases. 

The -05- version of use cases shows the lack of clarity about how this
should be approached (and the lack of time as the deadline approached).

Comments welcome.

David Harrington
ietfdbh@comcast.net
+1-603-828-1401



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From: "Romascanu, Dan (Dan)" <dromasca@avaya.com>
To: "sacm@ietf.org" <sacm@ietf.org>
Thread-Topic: SACM @ IETF-87 - draft agenda
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We have posted the draft agenda for the first SACM WG meeting at https://da=
tatracker.ietf.org/meeting/87/agenda/sacm/.=20

Comments and last minute requests for the agenda are welcome. The agenda al=
so includes a reading list which will help everybody come prepared to the m=
eeting. Although this is the first WG meeting we want to spend as little ti=
me as possible with presentations and use at best the expensive face-to-fac=
e meeting time for discussions about how to progress the items on the chart=
er. Priority will be given to the use cases which drive the requirements, f=
ramework, and other items on the agenda and working group path.=20

See you all in Berlin.=20

Regards,

Adam and Dan





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From: "Romascanu, Dan (Dan)" <dromasca@avaya.com>
To: "sacm@ietf.org" <sacm@ietf.org>
Thread-Topic: SACM - welcome breakfast for first-time participants
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Hi,=20

Some of the attendees in the SACM WG meeting in Berlin will be first time p=
articipants in the IETF. We would like to extend them a warm welcome and su=
ggest that we meet for breakfast on Thursday 8/1, at 8AM. It would be a goo=
d opportunity for us (SACM WG chairs) to meet and know you, hear from you w=
hat are the your areas of interest and expectations from the IETF and from =
the SACM WG. We will be glad to answer any questions related to the WG and =
to the IETF.=20

Old timers who are interested to meet with the first-time participants are =
also welcome.=20

The exact location of the breakfast gathering will be announced in a mail t=
o the list the day before the meeting.=20

See you all in Berlin.=20

Regards,

Adam and Dan




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From: "Romascanu, Dan (Dan)" <dromasca@avaya.com>
To: "sacm@ietf.org" <sacm@ietf.org>
Thread-Topic: SACM - welcome breakfast for first-time participants
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We forgot to mention - folks interested to attend, please send us a message=
.



> -----Original Message-----
> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf Of
> Romascanu, Dan (Dan)
> Sent: Tuesday, July 16, 2013 11:59 PM
> To: sacm@ietf.org
> Subject: [sacm] SACM - welcome breakfast for first-time participants
>=20
> Hi,
>=20
> Some of the attendees in the SACM WG meeting in Berlin will be first
> time participants in the IETF. We would like to extend them a warm
> welcome and suggest that we meet for breakfast on Thursday 8/1, at 8AM.
> It would be a good opportunity for us (SACM WG chairs) to meet and know
> you, hear from you what are the your areas of interest and expectations
> from the IETF and from the SACM WG. We will be glad to answer any
> questions related to the WG and to the IETF.
>=20
> Old timers who are interested to meet with the first-time participants
> are also welcome.
>=20
> The exact location of the breakfast gathering will be announced in a
> mail to the list the day before the meeting.
>=20
> See you all in Berlin.
>=20
> Regards,
>=20
> Adam and Dan
>=20
>=20
>=20
> _______________________________________________
> sacm mailing list
> sacm@ietf.org
> https://www.ietf.org/mailman/listinfo/sacm

From Adam.Montville@cisecurity.org  Thu Jul 18 08:49:25 2013
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From: Adam Montville <Adam.Montville@cisecurity.org>
To: "sacm@ietf.org" <sacm@ietf.org>
Thread-Topic: Appropriate Level for Use Cases
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Subject: [sacm] Appropriate Level for Use Cases
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Greetings all,

I'd like to start a discussion here on what we, as a community, believe is=
 the appropriate descriptive level for what we are calling a "use case."  =
>From my background - biased by computer science, electrical and computer e=
ngineering, and years of working with software development groups - a "use=
 case" is something that looks a lot like the two I sent earlier this week=
 ([1] and [2]). =20

At that level of detail, we have a better understanding of who relying par=
ties are on the capability being described and what pieces of data and/or =
pre-requisites are otherwise needed for the capability to be successful, w=
hich is one of the reasons I like that level of description. =20

To me, it makes sense to get what we are calling use cases to an appropria=
te level of detail to act as representatives of requirements.  Requirement=
s can be derived from the use cases, and from non-use-case sources.  Then,=
 once requirements are better known, we can move on to architectures.

Additionally, David Harrington has asked whether we're paying enough atten=
tion to requirements [3], and I agree that we may not be at this time.  Bu=
t, I would also ask whether we ought to be just yet, at least until a good=
 set of appropriately described use cases exists. =20

All that said, I think much of this work can be done in parallel or in qui=
ck iterations, but I also think that, if parallel/iterative development of=
 use cases, requirements, and architecture is going to be successful, we n=
eed to discuss more here - on the list. :-)

That's my take on it anyway.  I guess the bottom line is that we have an O=
ctober milestone to have an initial I-D submission to IESG for the archite=
cture, and there are two general steps that  need to complete before we ca=
n feel comfortable with the architectural direction - use cases and requir=
ements.

Thoughts?

Adam


[1] http://www.ietf.org/mail-archive/web/sacm/current/msg01282.html=20
[2] http://www.ietf.org/mail-archive/web/sacm/current/msg01284.html=20
[3] http://www.ietf.org/mail-archive/web/sacm/current/msg01288.html=20


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From: Rainer Enders <Rainer.Enders@ncp-e.com>
To: Adam Montville <Adam.Montville@cisecurity.org>, "sacm@ietf.org" <sacm@ietf.org>
Date: Thu, 18 Jul 2013 18:07:17 +0200
Thread-Topic: [sacm] Appropriate Level for Use Cases
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Hello Adam,


I agree with your thinking and I found your presentation of use cases
refreshing and promising. With my background as a research engineer it
appears, at least to me, that at times researchers and scientists tend to
overanalyze problems. Having said that I often look at use cases and
wonder if the work that they are intending to support is worth the effort
because they do not offer significant substantiation and differentiation.
We have a large number of standards and if you have a good knowledge base
of such standards you often can imagine simplistic use cases could easily
be addressed by existing standards and wonder what the value add is of the
work that is being proposed. So in that sense use cases are a critical
element. Another related thought I have on this subject is that the lack
of broad industry participation in standardization efforts is a limiting
factor in the sense that there is a difference between practical issues
and theoretical issues. Maybe a way to address this is to take discussions
on standardization efforts into more public forums (trade shows, industry
events)?

Regards,
Rainer

On 7/18/13 8:49 AM, "Adam Montville" <Adam.Montville@cisecurity.org> wrote:

>Greetings all,
>
>I'd like to start a discussion here on what we, as a community, believe
>is the appropriate descriptive level for what we are calling a "use
>case."  From my background - biased by computer science, electrical and
>computer engineering, and years of working with software development
>groups - a "use case" is something that looks a lot like the two I sent
>earlier this week ([1] and [2]).
>
>At that level of detail, we have a better understanding of who relying
>parties are on the capability being described and what pieces of data
>and/or pre-requisites are otherwise needed for the capability to be
>successful, which is one of the reasons I like that level of description.
>=20
>
>To me, it makes sense to get what we are calling use cases to an
>appropriate level of detail to act as representatives of requirements.
>Requirements can be derived from the use cases, and from non-use-case
>sources.  Then, once requirements are better known, we can move on to
>architectures.
>
>Additionally, David Harrington has asked whether we're paying enough
>attention to requirements [3], and I agree that we may not be at this
>time.  But, I would also ask whether we ought to be just yet, at least
>until a good set of appropriately described use cases exists.
>
>All that said, I think much of this work can be done in parallel or in
>quick iterations, but I also think that, if parallel/iterative
>development of use cases, requirements, and architecture is going to be
>successful, we need to discuss more here - on the list. :-)
>
>That's my take on it anyway.  I guess the bottom line is that we have an
>October milestone to have an initial I-D submission to IESG for the
>architecture, and there are two general steps that  need to complete
>before we can feel comfortable with the architectural direction - use
>cases and requirements.
>
>Thoughts?
>
>Adam
>
>
>[1] http://www.ietf.org/mail-archive/web/sacm/current/msg01282.html
>[2] http://www.ietf.org/mail-archive/web/sacm/current/msg01284.html
>[3] http://www.ietf.org/mail-archive/web/sacm/current/msg01288.html
>
>
>This message and attachments may contain confidential information.  If it
>appears that this message was sent to you by mistake, any retention,
>dissemination, distribution or copying of this message and attachments is
>strictly prohibited.  Please notify the sender immediately and
>permanently delete the message and any attachments.
>_______________________________________________
>sacm mailing list
>sacm@ietf.org
>https://www.ietf.org/mailman/listinfo/sacm


From Adam.Montville@cisecurity.org  Thu Jul 18 10:28:53 2013
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From: Adam Montville <Adam.Montville@cisecurity.org>
To: "sacm@ietf.org" <sacm@ietf.org>
Thread-Topic: Meetecho support
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FYI.

I don't believe we have anyone requesting or planning for remote presentat=
ion, but if we do, please speak up :-)

Regards,

Adam


> -----Original Message-----
> From: info@meetecho.com [mailto:info@meetecho.com]
> Sent: Thursday, July 18, 2013 6:06 AM
> Subject: Meetecho support
>=20
> Dear chair(s),
>=20
> we confirm Meetecho support for your WG meeting session at IETF-87.
> The agenda of supported sessions is available at
> http://ietf87.conf.meetecho.com.
>=20
> If you plan to have remote presenters, you're kindly requested to inform=
 us
> in proper advance, since this needs special set-up.
>=20
> *The deadline for requesting remote presentation support is July 24.*
>=20
> Thanks,
> the Meetecho team
>=20
> --
> Meetecho s.r.l.
> www.meetecho.com
>=20
> ...

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From Kent_Landfield@mcafee.com  Thu Jul 18 10:32:22 2013
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From: <Kent_Landfield@McAfee.com>
To: <Adam.Montville@cisecurity.org>, <sacm@ietf.org>
Thread-Topic: [sacm] FW: Meetecho support
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Yes, we should always have Meetecho support.  I will not be able to make it=
 do to a family illness and was planning on attending remotely.

Thanks.

Kent Landfield

McAfee | An Intel Company
Direct: +1.972.963.7096
Mobile: +1.817.637.8026
Web: www.mcafee.com<http://www.mcafee.com/>

From: Adam Montville <Adam.Montville@cisecurity.org<mailto:Adam.Montville@c=
isecurity.org>>
Date: Thursday, July 18, 2013 12:28 PM
To: "sacm@ietf.org<mailto:sacm@ietf.org>" <sacm@ietf.org<mailto:sacm@ietf.o=
rg>>
Subject: [sacm] FW: Meetecho support

FYI.

I don't believe we have anyone requesting or planning for remote presentati=
on, but if we do, please speak up :-)

Regards,

Adam


-----Original Message-----
From: info@meetecho.com<mailto:info@meetecho.com> [mailto:info@meetecho.com=
]
Sent: Thursday, July 18, 2013 6:06 AM
Subject: Meetecho support
Dear chair(s),
we confirm Meetecho support for your WG meeting session at IETF-87.
The agenda of supported sessions is available at
http://ietf87.conf.meetecho.com.
If you plan to have remote presenters, you're kindly requested to inform us
in proper advance, since this needs special set-up.
*The deadline for requesting remote presentation support is July 24.*
Thanks,
the Meetecho team
--
Meetecho s.r.l.
www.meetecho.com
...

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<div>Yes, we should always have Meetecho support. &nbsp;I will not be able =
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<span style=3D"font-weight:bold">Date: </span>Thursday, July 18, 2013 12:28=
 PM<br>
<span style=3D"font-weight:bold">To: </span>&quot;<a href=3D"mailto:sacm@ie=
tf.org">sacm@ietf.org</a>&quot; &lt;<a href=3D"mailto:sacm@ietf.org">sacm@i=
etf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>[sacm] FW: Meetecho suppor=
t<br>
</div>
<div><br>
</div>
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
 #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div>
<div>
<div>FYI.</div>
<div><br>
</div>
<div>I don't believe we have anyone requesting or planning for remote prese=
ntation, but if we do, please speak up :-)</div>
<div><br>
</div>
<div>Regards,</div>
<div><br>
</div>
<div>Adam</div>
<div><br>
</div>
<div><br>
</div>
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
 #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div>-----Original Message-----</div>
<div>From: <a href=3D"mailto:info@meetecho.com">info@meetecho.com</a> [<a h=
ref=3D"mailto:info@meetecho.com">mailto:info@meetecho.com</a>]</div>
<div>Sent: Thursday, July 18, 2013 6:06 AM</div>
<div>Subject: Meetecho support</div>
<div></div>
<div>Dear chair(s),</div>
<div></div>
<div>we confirm Meetecho support for your WG meeting session at IETF-87.</d=
iv>
<div>The agenda of supported sessions is available at</div>
<div><a href=3D"http://ietf87.conf.meetecho.com">http://ietf87.conf.meetech=
o.com</a>.</div>
<div></div>
<div>If you plan to have remote presenters, you're kindly requested to info=
rm us</div>
<div>in proper advance, since this needs special set-up.</div>
<div></div>
<div>*The deadline for requesting remote presentation support is July 24.*<=
/div>
<div></div>
<div>Thanks,</div>
<div>the Meetecho team</div>
<div></div>
<div>--</div>
<div>Meetecho s.r.l.</div>
<div>www.meetecho.com</div>
<div></div>
<div>...</div>
</blockquote>
<div><br>
</div>
<div>This message and attachments may contain confidential information.&nbs=
p;&nbsp;If it appears that this message was sent to you by mistake, any ret=
ention, dissemination, distribution or copying of this message and attachme=
nts is strictly prohibited.&nbsp;&nbsp;Please notify
 the sender immediately and permanently delete the message and any attachme=
nts.</div>
<div>_______________________________________________</div>
<div>sacm mailing list</div>
<div><a href=3D"mailto:sacm@ietf.org">sacm@ietf.org</a></div>
<div><a href=3D"https://www.ietf.org/mailman/listinfo/sacm">https://www.iet=
f.org/mailman/listinfo/sacm</a></div>
<div><br>
</div>
</div>
</div>
</blockquote>
</span>
</body>
</html>

--_000_3CBA099FBA0AB843895D72474092B8CF2D88C4MIVEXAMER1N1corpn_--

From Kent_Landfield@mcafee.com  Thu Jul 18 10:33:26 2013
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From: <Kent_Landfield@McAfee.com>
To: <Adam.Montville@cisecurity.org>, <sacm@ietf.org>
Thread-Topic: [sacm] FW: Meetecho support
Thread-Index: AQHOg7eKN4tdu2rkTkKX1enG5VOIt5lqsXVA///vkwCAAABdAA==
Date: Thu, 18 Jul 2013 17:32:39 +0000
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Sorry, maybe I misunderstood.  I will not be presenting remotely but would =
like to have the ability to participate via Meetecho.

Kent Landfield

McAfee | An Intel Company
Direct: +1.972.963.7096
Mobile: +1.817.637.8026
Web: www.mcafee.com<http://www.mcafee.com/>

From: <Landfield>, Kent Landfield <Kent_Landfield@McAfee.com<mailto:Kent_La=
ndfield@McAfee.com>>
Date: Thursday, July 18, 2013 12:31 PM
To: Adam Montville <Adam.Montville@cisecurity.org<mailto:Adam.Montville@cis=
ecurity.org>>, "sacm@ietf.org<mailto:sacm@ietf.org>" <sacm@ietf.org<mailto:=
sacm@ietf.org>>
Subject: Re: [sacm] FW: Meetecho support

Yes, we should always have Meetecho support.  I will not be able to make it=
 do to a family illness and was planning on attending remotely.

Thanks.

Kent Landfield

McAfee | An Intel Company
Direct: +1.972.963.7096
Mobile: +1.817.637.8026
Web: www.mcafee.com<http://www.mcafee.com/>

From: Adam Montville <Adam.Montville@cisecurity.org<mailto:Adam.Montville@c=
isecurity.org>>
Date: Thursday, July 18, 2013 12:28 PM
To: "sacm@ietf.org<mailto:sacm@ietf.org>" <sacm@ietf.org<mailto:sacm@ietf.o=
rg>>
Subject: [sacm] FW: Meetecho support

FYI.

I don't believe we have anyone requesting or planning for remote presentati=
on, but if we do, please speak up :-)

Regards,

Adam


-----Original Message-----
From: info@meetecho.com<mailto:info@meetecho.com> [mailto:info@meetecho.com=
]
Sent: Thursday, July 18, 2013 6:06 AM
Subject: Meetecho support
Dear chair(s),
we confirm Meetecho support for your WG meeting session at IETF-87.
The agenda of supported sessions is available at
http://ietf87.conf.meetecho.com.
If you plan to have remote presenters, you're kindly requested to inform us
in proper advance, since this needs special set-up.
*The deadline for requesting remote presentation support is July 24.*
Thanks,
the Meetecho team
--
Meetecho s.r.l.
www.meetecho.com
...

This message and attachments may contain confidential information.  If it a=
ppears that this message was sent to you by mistake, any retention, dissemi=
nation, distribution or copying of this message and attachments is strictly=
 prohibited.  Please notify the sender immediately and permanently delete t=
he message and any attachments.
_______________________________________________
sacm mailing list
sacm@ietf.org<mailto:sacm@ietf.org>
https://www.ietf.org/mailman/listinfo/sacm


--_000_3CBA099FBA0AB843895D72474092B8CF2D893AMIVEXAMER1N1corpn_
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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dus-ascii"=
>
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space; color: rgb(0, 0, 0); font-size: 16px; font-fami=
ly: 'Times New Roman', sans-serif; ">
<div>
<div>
<div>Sorry, maybe I misunderstood. &nbsp;I will not be presenting remotely =
but would like to have the ability to participate via Meetecho.</div>
<div><br>
</div>
<div><span class=3D"Apple-style-span" style=3D"color: rgb(96, 106, 113); fo=
nt-family: Arial, Helvetica, sans-serif; font-size: 12px; border-spacing: 1=
px; "><strong>Kent Landfield</strong><br>
<br>
<strong>McAfee | An Intel Company</strong><br>
Direct: &#43;1.972.963.7096&nbsp;<br>
Mobile: &#43;1.817.637.8026<br>
<strong>Web:&nbsp;</strong><a href=3D"http://www.mcafee.com/" style=3D"colo=
r: rgb(96, 106, 113) !important; ">www.mcafee.com</a></span></div>
</div>
</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Calibri; font-size:11pt; text-align:left; color:b=
lack; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM:=
 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid;=
 BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"font-weight:bold">From: </span>&lt;Landfield&gt;, Kent Landf=
ield &lt;<a href=3D"mailto:Kent_Landfield@McAfee.com">Kent_Landfield@McAfee=
.com</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Thursday, July 18, 2013 12:31=
 PM<br>
<span style=3D"font-weight:bold">To: </span>Adam Montville &lt;<a href=3D"m=
ailto:Adam.Montville@cisecurity.org">Adam.Montville@cisecurity.org</a>&gt;,=
 &quot;<a href=3D"mailto:sacm@ietf.org">sacm@ietf.org</a>&quot; &lt;<a href=
=3D"mailto:sacm@ietf.org">sacm@ietf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>Re: [sacm] FW: Meetecho su=
pport<br>
</div>
<div><br>
</div>
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
 #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div>
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space; color: rgb(0, 0, 0); font-size: 16px; font-famil=
y: 'Times New Roman', sans-serif; ">
<div>
<div>
<div>Yes, we should always have Meetecho support. &nbsp;I will not be able =
to make it do to a family illness and was planning on attending remotely.</=
div>
<div><br>
</div>
<div>Thanks.</div>
<div><br>
</div>
<div><span class=3D"Apple-style-span" style=3D"color: rgb(96, 106, 113); fo=
nt-family: Arial, Helvetica, sans-serif; font-size: 12px; border-spacing: 1=
px; "><strong>Kent Landfield</strong><br>
<br>
<strong>McAfee | An Intel Company</strong><br>
Direct: &#43;1.972.963.7096&nbsp;<br>
Mobile: &#43;1.817.637.8026<br>
<strong>Web:&nbsp;</strong><a href=3D"http://www.mcafee.com/" style=3D"colo=
r: rgb(96, 106, 113) !important; ">www.mcafee.com</a></span></div>
</div>
</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Calibri; font-size:11pt; text-align:left; color:b=
lack; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM:=
 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid;=
 BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"font-weight:bold">From: </span>Adam Montville &lt;<a href=3D=
"mailto:Adam.Montville@cisecurity.org">Adam.Montville@cisecurity.org</a>&gt=
;<br>
<span style=3D"font-weight:bold">Date: </span>Thursday, July 18, 2013 12:28=
 PM<br>
<span style=3D"font-weight:bold">To: </span>&quot;<a href=3D"mailto:sacm@ie=
tf.org">sacm@ietf.org</a>&quot; &lt;<a href=3D"mailto:sacm@ietf.org">sacm@i=
etf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>[sacm] FW: Meetecho suppor=
t<br>
</div>
<div><br>
</div>
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
 #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div>
<div>
<div>FYI.</div>
<div><br>
</div>
<div>I don't believe we have anyone requesting or planning for remote prese=
ntation, but if we do, please speak up :-)</div>
<div><br>
</div>
<div>Regards,</div>
<div><br>
</div>
<div>Adam</div>
<div><br>
</div>
<div><br>
</div>
<blockquote id=3D"MAC_OUTLOOK_ATTRIBUTION_BLOCKQUOTE" style=3D"BORDER-LEFT:=
 #b5c4df 5 solid; PADDING:0 0 0 5; MARGIN:0 0 0 5;">
<div>-----Original Message-----</div>
<div>From: <a href=3D"mailto:info@meetecho.com">info@meetecho.com</a> [<a h=
ref=3D"mailto:info@meetecho.com">mailto:info@meetecho.com</a>]</div>
<div>Sent: Thursday, July 18, 2013 6:06 AM</div>
<div>Subject: Meetecho support</div>
<div></div>
<div>Dear chair(s),</div>
<div></div>
<div>we confirm Meetecho support for your WG meeting session at IETF-87.</d=
iv>
<div>The agenda of supported sessions is available at</div>
<div><a href=3D"http://ietf87.conf.meetecho.com">http://ietf87.conf.meetech=
o.com</a>.</div>
<div></div>
<div>If you plan to have remote presenters, you're kindly requested to info=
rm us</div>
<div>in proper advance, since this needs special set-up.</div>
<div></div>
<div>*The deadline for requesting remote presentation support is July 24.*<=
/div>
<div></div>
<div>Thanks,</div>
<div>the Meetecho team</div>
<div></div>
<div>--</div>
<div>Meetecho s.r.l.</div>
<div>www.meetecho.com</div>
<div></div>
<div>...</div>
</blockquote>
<div><br>
</div>
<div>This message and attachments may contain confidential information.&nbs=
p;&nbsp;If it appears that this message was sent to you by mistake, any ret=
ention, dissemination, distribution or copying of this message and attachme=
nts is strictly prohibited.&nbsp;&nbsp;Please notify
 the sender immediately and permanently delete the message and any attachme=
nts.</div>
<div>_______________________________________________</div>
<div>sacm mailing list</div>
<div><a href=3D"mailto:sacm@ietf.org">sacm@ietf.org</a></div>
<div><a href=3D"https://www.ietf.org/mailman/listinfo/sacm">https://www.iet=
f.org/mailman/listinfo/sacm</a></div>
<div><br>
</div>
</div>
</div>
</blockquote>
</span></div>
</div>
</blockquote>
</span>
</body>
</html>

--_000_3CBA099FBA0AB843895D72474092B8CF2D893AMIVEXAMER1N1corpn_--

From Adam.Montville@cisecurity.org  Thu Jul 18 11:25:37 2013
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From: Adam Montville <Adam.Montville@cisecurity.org>
To: "Kent_Landfield@McAfee.com" <Kent_Landfield@McAfee.com>, "sacm@ietf.org" <sacm@ietf.org>
Thread-Topic: [sacm] FW: Meetecho support
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Understood, Kent.  Best wishes to you and your family.

From: Kent_Landfield@McAfee.com [mailto:Kent_Landfield@McAfee.com]
Sent: Thursday, July 18, 2013 10:33 AM
To: Adam Montville; sacm@ietf.org
Subject: Re: [sacm] FW: Meetecho support

Sorry, maybe I misunderstood.  I will not be presenting remotely but would=
 like to have the ability to participate via Meetecho.

Kent Landfield

McAfee | An Intel Company
Direct: +1.972.963.7096
Mobile: +1.817.637.8026
Web: www.mcafee.com<http://www.mcafee.com/>

From: <Landfield>, Kent Landfield <Kent_Landfield@McAfee.com<mailto:Kent_L=
andfield@McAfee.com>>
Date: Thursday, July 18, 2013 12:31 PM
To: Adam Montville <Adam.Montville@cisecurity.org<mailto:Adam.Montville@ci=
security.org>>, "sacm@ietf.org<mailto:sacm@ietf.org>" <sacm@ietf.org<mailt=
o:sacm@ietf.org>>
Subject: Re: [sacm] FW: Meetecho support

Yes, we should always have Meetecho support.  I will not be able to make i=
t do to a family illness and was planning on attending remotely.

Thanks.

Kent Landfield

McAfee | An=20Intel Company
Direct: +1.972.963.7096
Mobile: +1.817.637.8026
Web: www.mcafee.com<http://www.mcafee.com/>

From: Adam Montville <Adam.Montville@cisecurity.org<mailto:Adam.Montville@=
cisecurity.org>>
Date: Thursday, July 18, 2013 12:28 PM
To: "sacm@ietf.org<mailto:sacm@ietf.org>" <sacm@ietf.org<mailto:sacm@ietf.=
org>>
Subject: [sacm] FW: Meetecho support

FYI.

I don't believe we have anyone requesting or planning for remote presentat=
ion, but if we do, please speak up :-)

Regards,

Adam


-----Original Message-----
From: info@meetecho.com<mailto:info@meetecho.com> [mailto:info@meetecho.co=
m]
Sent: Thursday, July 18, 2013 6:06 AM
Subject: Meetecho support
Dear chair(s),
we confirm Meetecho support for your WG meeting session at IETF-87.
The agenda of supported sessions is available at
http://ietf87.conf.meetecho.com.
If you plan to have remote presenters, you're kindly requested to inform u=
s
in proper advance, since this needs special set-up.
*The deadline for requesting remote presentation support is July 24.*
Thanks,
the Meetecho team
--
Meetecho s.r.l.
www.meetecho.com<http://www.meetecho.com>
...

This message and attachments may contain confidential information.  If it =
appears that this message was sent to you by mistake, any retention, disse=
mination, distribution or copying of this message and attachments is stric=
tly prohibited.  Please notify the sender immediately and permanently dele=
te the message and any attachments.
_______________________________________________
sacm mailing list
sacm@ietf.org<mailto:sacm@ietf.org>
https://www.ietf.org/mailman/listinfo/sacm


...

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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Understood, Kent.&nbsp;=
 Best wishes to you and your family.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;C=
alibri&quot;,&quot;sans-serif&quot;;color:#1F497D"><o:p>&nbsp;</o:p></span=
></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in=
 4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in=
 0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quo=
t;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font=
-size:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> Kent_=
Landfield@McAfee.com [mailto:Kent_Landfield@McAfee.com]
<br>
<b>Sent:</b> Thursday, July 18, 2013 10:33 AM<br>
<b>To:</b> Adam Montville; sacm@ietf.org<br>
<b>Subject:</b> Re: [sacm] FW: Meetecho support<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Sorry, maybe I misunder=
stood. &nbsp;I will not be presenting remotely but would like to have the =
ability to participate via Meetecho.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><o:p>&nbsp;</o:p></span=
></p>
</div>
<div>
<p class=3D"MsoNormal"><strong><span style=3D"font-size:9.0pt;font-family:=
&quot;Arial&quot;,&quot;sans-serif&quot;;color:#606A71">Kent Landfield</sp=
an></strong><span style=3D"font-size:9.0pt;font-family:&quot;Arial&quot;,&=
quot;sans-serif&quot;;color:#606A71"><br>
<br>
<strong><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot=
;">McAfee | An Intel Company</span></strong><br>
<span class=3D"apple-style-span">Direct: &#43;1.972.963.7096&nbsp;</span><=
br>
<span class=3D"apple-style-span">Mobile: &#43;1.817.637.8026</span><br>
<strong><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot=
;">Web:&nbsp;</span></strong><span class=3D"apple-style-span"><a href=3D"h=
ttp://www.mcafee.com/">www.mcafee.com</a></span></span><span style=3D"colo=
r:black"><o:p></o:p></span></p>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><o:p>&nbsp;</o:p></span=
></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in=
 0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quo=
t;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;=
,&quot;sans-serif&quot;;color:black">&lt;Landfield&gt;, Kent Landfield &lt=
;<a href=3D"mailto:Kent_Landfield@McAfee.com">Kent_Landfield@McAfee.com</a=
>&gt;<br>
<b>Date: </b>Thursday, July 18, 2013 12:31 PM<br>
<b>To: </b>Adam Montville &lt;<a href=3D"mailto:Adam.Montville@cisecurity.=
org">Adam.Montville@cisecurity.org</a>&gt;, &quot;<a href=3D"mailto:sacm@i=
etf.org">sacm@ietf.org</a>&quot; &lt;<a href=3D"mailto:sacm@ietf.org">sacm=
@ietf.org</a>&gt;<br>
<b>Subject: </b>Re: [sacm] FW: Meetecho support<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><o:p>&nbsp;</o:p></span=
></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0=
in 0in 0in 4.0pt;margin-left:3.75pt;margin-right:0in" id=3D"MAC_OUTLOOK_AT=
TRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Yes, we should always h=
ave Meetecho support. &nbsp;I will not be able to make it do to a family i=
llness and was planning on attending remotely.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><o:p>&nbsp;</o:p></span=
></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Thanks.<o:p></o:p></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><o:p>&nbsp;</o:p></span=
></p>
</div>
<div>
<p class=3D"MsoNormal"><strong><span style=3D"font-size:9.0pt;font-family:=
&quot;Arial&quot;,&quot;sans-serif&quot;;color:#606A71">Kent Landfield</sp=
an></strong><span style=3D"font-size:9.0pt;font-family:&quot;Arial&quot;,&=
quot;sans-serif&quot;;color:#606A71"><br>
<br>
<strong><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot=
;">McAfee | An Intel Company</span></strong><br>
<span class=3D"apple-style-span">Direct: &#43;1.972.963.7096&nbsp;</span><=
br>
<span class=3D"apple-style-span">Mobile: &#43;1.817.637.8026</span><br>
<strong><span style=3D"font-family:&quot;Arial&quot;,&quot;sans-serif&quot=
;">Web:&nbsp;</span></strong><span class=3D"apple-style-span"><a href=3D"h=
ttp://www.mcafee.com/">www.mcafee.com</a></span></span><span style=3D"colo=
r:black"><o:p></o:p></span></p>
</div>
</div>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><o:p>&nbsp;</o:p></span=
></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in=
 0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11.0pt;font-family:&quo=
t;Calibri&quot;,&quot;sans-serif&quot;;color:black">From:
</span></b><span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;=
,&quot;sans-serif&quot;;color:black">Adam Montville &lt;<a href=3D"mailto:=
Adam.Montville@cisecurity.org">Adam.Montville@cisecurity.org</a>&gt;<br>
<b>Date: </b>Thursday, July 18, 2013 12:28 PM<br>
<b>To: </b>&quot;<a href=3D"mailto:sacm@ietf.org">sacm@ietf.org</a>&quot; =
&lt;<a href=3D"mailto:sacm@ietf.org">sacm@ietf.org</a>&gt;<br>
<b>Subject: </b>[sacm] FW: Meetecho support<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><o:p>&nbsp;</o:p></span=
></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0=
in 0in 0in 4.0pt;margin-left:3.75pt;margin-right:0in" id=3D"MAC_OUTLOOK_AT=
TRIBUTION_BLOCKQUOTE">
<div>
<div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">FYI.<o:p></o:p></span><=
/p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><o:p>&nbsp;</o:p></span=
></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">I don't believe we have=
 anyone requesting or planning for remote presentation, but if we do, plea=
se speak up :-)<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><o:p>&nbsp;</o:p></span=
></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Regards,<o:p></o:p></sp=
an></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><o:p>&nbsp;</o:p></span=
></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Adam<o:p></o:p></span><=
/p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><o:p>&nbsp;</o:p></span=
></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><o:p>&nbsp;</o:p></span=
></p>
</div>
<blockquote style=3D"border:none;border-left:solid #B5C4DF 4.5pt;padding:0=
in 0in 0in 4.0pt;margin-left:3.75pt;margin-right:0in" id=3D"MAC_OUTLOOK_AT=
TRIBUTION_BLOCKQUOTE">
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">-----Original Message--=
---<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">From: <a href=3D"mailto=
:info@meetecho.com">
info@meetecho.com</a> [<a href=3D"mailto:info@meetecho.com">mailto:info@me=
etecho.com</a>]<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Sent: Thursday, July 18=
, 2013 6:06 AM<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Subject: Meetecho suppo=
rt<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Dear chair(s),<o:p></o:=
p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">we confirm Meetecho sup=
port for your WG meeting session at IETF-87.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">The agenda of supported=
 sessions is available at<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><a href=3D"http://ietf8=
7.conf.meetecho.com">http://ietf87.conf.meetecho.com</a>.<o:p></o:p></span=
></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">If you plan to have rem=
ote presenters, you're kindly requested to inform us<o:p></o:p></span></p>=

</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">in proper advance, sinc=
e this needs special set-up.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">*The deadline for reque=
sting remote presentation support is July 24.*<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Thanks,<o:p></o:p></spa=
n></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">the Meetecho team<o:p><=
/o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">--<o:p></o:p></span></p=
>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">Meetecho s.r.l.<o:p></o=
:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><a href=3D"http://www.m=
eetecho.com">www.meetecho.com</a><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">...<o:p></o:p></span></=
p>
</div>
</blockquote>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><o:p>&nbsp;</o:p></span=
></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">This message and attach=
ments may contain confidential information.&nbsp;&nbsp;If it appears that =
this message was sent to you by mistake, any retention, dissemination, dis=
tribution or copying of this message and attachments
 is strictly prohibited.&nbsp;&nbsp;Please notify the sender immediately a=
nd permanently delete the=20message and any attachments.<o:p></o:p></span>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">_______________________=
________________________<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black">sacm mailing list<o:p><=
/o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><a href=3D"mailto:sacm@=
ietf.org">sacm@ietf.org</a><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><a href=3D"https://www.=
ietf.org/mailman/listinfo/sacm">https://www.ietf.org/mailman/listinfo/sacm=
</a><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"color:black"><o:p>&nbsp;</o:p></span=
></p>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</blockquote>
<p class=3D"MsoNormal"><span style=3D"color:black"><br>
...<o:p></o:p></span></p>
</div>
</div>
<br clear=3D"both">
This message and attachments may contain confidential information.  If it =
appears that this message was sent to you by mistake, any retention, disse=
mination, distribution or copying of this message and attachments is stric=
tly prohibited.  Please notify the sender immediately and permanently dele=
te the message and any attachments.<BR>
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David, et al,

Text to accompany the pretty pictures I sent out last week.  I'm not 
even going to try turning them into ASCII diagrams right now.

If you'd like more information on the alternate architecture I 
originally drew these to illustrate you can go back to these archive 
messages:

http://www.ietf.org/mail-archive/web/sacm/current/msg00884.html
http://www.ietf.org/mail-archive/web/sacm/current/msg00947.html

but that's not really the focus I have at the moment.


Plus, answers to your other questions inline below.



---------------------=========================---------------------
1) BasicEntities:

"Entities" are logical constructs that are defined by which of the SACM 
standards they implement.  In this first diagram these entities have 
been broken out to their most primitive.

The intention of this diagram is as a starting point in illustrating the 
flexibility of the architecture and not as a complete representation. 
For that reason the Content Repository entity has not been included, but 
the interaction points of the Results View and Controller Front-End (not 
currently covered by the SACM working group) have been added.

This architecture and its data flows also differ from the 
waltermire-sacm-architecture.  The purpose at this time is not to 
discuss the merits of either approach, but to show how the concept of 
these proposed standards gives the flexibility to solve a wide variety 
of real-world situations while also reaping the benefits of standardization.

Taking the entity "Data Collector" as an example, what qualifies it as a 
Data Collector is the ability to receive requests to collect data and 
return the collected data where the request and response are done via 
the standards proposed by this working group.  The Data Collector may 
have more capabilities, but without covering these at a minimum it would 
not qualify as a Data Collector.

Similarly, the Evaluator receives/responds to marching orders from the 
controller, sends/receives data collection requests and (optional dotted 
line) interacts with the data store.

       ---------------=========================---------------

2) Basic Grouped Entities

The primitive entities from (1) have been grouped into two physical 
implementations.  The Management System has the user interface (Results 
Viewer, Controller Front-End), the Controller, and the Results Data 
Store.  It exposes no interfaces, but is able to query any number of 
Evaluators to performs assessments.

The Collector/Processor has both the Data Collector and the Evaluator. 
The only line of communication exposed by the Collector/Processor is 
Evaluator requests/responses, so to an external entity it only qualifies 
as an Evaluator.  However, it also has its own integrated Data Collector 
that operates at the local level of scope.  This, then, is a smart agent 
that distributes the evaluation process.  It could also easily expose 
the Data Collector interfaces making it accessible to other Evaluators.

If the Collector/Process does not expose the Data Collector interfaces 
it could actually do collection via a proprietary means.  This type of 
hybrid my be necessary to address cases that fall outside of these 
standards, but it can also be used to give access to existing 
proprietary solutions.

       ---------------=========================---------------

3) Entities in Use

Each of the green boxes represents a single computer, with the necessary 
interfaces exposed to qualify it for each of the role entities that it 
encloses.

The Results Datastore, for example, is on a dedicated database server 
that can be optimized for database activity and may in fact be 
administered by separate personnel.

The Assessment Server contains the entities necessary for performing the 
scheduled tasks, evaluating data collected from Data Collector agents, 
using its own Data Collector(s) to collect data agentlessly, and 
retrieving artifacts from a separate independent enclave.

The Independent Workstation can perform and display self-assessments but 
can also be linked into the enterprise management system.



On 7/13/2013 11:16 AM, ietfdbh wrote:
> Hi Gunnar,
>
> Thanks; that's much better.
>
> I think many people will have many different approaches to their
> architecture, but there will be quite a bit of commonality we can try to
> extract from them.
> Would you be willing to write some text quickly describing your collection,
> assessment, and management system, so we can add this to the use-cases
> document?
> The more we understand how people plan to gather and assess data, and turn
> the collected data into information that can then be used by humans, the
> better we can design a solution to meet the needs of multiple approaches.
>
>
> I have some questions, so I can better understand your architecture, and to
> make sure I don't make any unwarranted assumptions.
> Working from EntitiesInUse,
> 1) Do these diagrams represent a system you have already implemented?
> 2) Has it been deployed in real-world environments?
> 3) Has it been deployed in enterprise environments? Service provider
> environment?

These diagrams are based primarily on what has been discussed so far on 
the SACM mailing list.  I'm making an effort to ignore what has already 
been done and focus on what makes best sense based on my current 
understanding of the goals of this working group.

But by some strange coincidence there are a lot of similarities between 
this and the products we currently build.  Which includes enterprise 
environments.


> 4) What are you using for protocols between the assessment server and the
> computer with agent?

Proprietary, but based on pretty standard things like XML and TLS.


> 5) What are you using for protocols between the assessment server and the
> computers without agents?

Whatever makes sense for each asset type and doesn't create an 
additional security exposure.  DCOM, NetBIOS, SSH, WBEM/WMI, telnet, ...



> 6) When the valuator gathers data from agent-less computers, does it convert
> the data into the same format that is used to gather data from a computer
> with agent?

In our current products, yes, the Evaluator in that case acts as a 
remote agentless Data Collector.

For SACM that would only be necessary if the raw collected data was a 
product to be transferred.  If the only product to be returned was the 
completed benchmark evaluation then there's no need to convert it to the 
SCAM Collected Data format.

On the other hand, if you look at Dave Waltermire's architecture, the 
Controller is between the Sensor (Data Collector) and Evaluator, so the 
only way to get assessment results from the Evaluator is if it is fed a 
SACM standard data collection.

It doesn't show up in my diagrams, but I think the Evaluator *should* be 
able to produce results when fed a diet of collected items.


> 7) It appears the controller always talks to the evaluator, never directly
> to the data collector. I realize this is an architectural drawing, and in
> actual coding a direct-connect might be used to performance improvements. Is
> the intent that the controller always goes through the evaluator function?

I'm undecided on that.  I'm wary of the bottleneck created being too 
reliant on the controller and I like being able to distribute the 
workload by possibly having evaluators local to the assets.

At the same time it's also more complicated to determine if an 
assessment request failed to occur in a timely manner if each request 
isn't being actively monitored by the controller.

There's also the problem of being able to authenticate to each asset to 
perform the collection/evaluation.  The exposure to that kind of data 
needs to be kept to an absolute minimum.



> 8) when you have a subdomain, which entities in the super-domain communicate
> directly with entities in the subdomain?

First, for clarity, the subdomain is just one category of subdividing an 
organization.  "Enclave" would be a better label to put on that.  Some 
entity that does its own security management, but is also part of a 
larger organization.


Communication is at whatever level is needed to fulfill the needs of the 
implementing organization.  That might be as informal as just doing 
database replication so that only results are available, or it might be 
all the way down to the level of direct data collection from individual 
assets.

I think that level of detail would be a bad idea for general usage, but 
we're already dealing with auditors who need to do periodic spot checks 
on a random selection of assets at multiple remote locations.



> 8a) Is this a server-to-server sharing of information?
> 8b) Can server A directly access the evaluator function in the subdomain B?
> or does it proxy requests for evaluations via subdomain server B controller?
> 8c) Can server A directly query the data collector in subdomain B? does it
> us

Possibly any of the above.  All it takes is access to the SACM interface 
at whatever level of access you are looking for, knowledge of what 
assets to access, and the ability to authenticate.

Most of the time anything other than summary information would be a bad 
idea.  Networks aren't built for the purpose of doing security audits on 
themselves after all.  Which is why I showed the subdomain having its 
own controller and database.  Distribute the workload and share the 
results -- which is a level not covered by SACM.

Alternatively, somebody on Network A could use a Results Viewer to 
connect to the Results Datastore in the subdomain.  This data flow is 
not currently covered in SACM so it would be proprietary, but there's no 
reason a Results Viewer couldn't connect to multiple Results Datastores 
and present the data as a single unified view.  No data replication 
necessary.



> 9) Is it fair to assume that the Independent Workstation is equivalent to a
> subdomain, which just happens to support only the one workstation it is
> running on?

In many ways, yes.  Being a local machine it poses no more cost in 
accessing at the data collection level than any other asset in the local 
domain and there are many benefits, from the enterprise level, in just 
treating it like another Collector or Evaluator.  Not something you'd 
want to do for a subdomain.

At the same time, we work with some multilevel organizations where 
security data for all assets must be collected but there is no single 
entity that has permissions to collect from all assets.  In that case a 
self-assessment must be performed and the results pushed to the 
repository and that's one of the things I was attempting to show with 
the Independent Workstation.


>
> More later ...
>
> Thanks,
> David Harrington
> ietfdbh@comcast.net
> +1-603-828-1401
>
>> -----Original Message-----
>> From: Gunnar Engelbach [mailto:Gunnar.Engelbach@ThreatGuard.com]
>> Sent: Friday, July 12, 2013 1:39 PM
>> To: ietfdbh
>> Cc: 'David Harrington'; 'Sean Turner'; sacm@ietf.org
>> Subject: Re: [sacm] Fwd: I-D Action: draft-handt-sacm-alternate-
>> architecture-00.txt
>>
>>
>> Try these.  They're just not scalable.
>>
>>
>>
>> On 7/12/2013 12:02 PM, ietfdbh wrote:
>>> I can't read your svg files.
>>>
>>> David Harrington
>>> ietfdbh@comcast.net
>>> +1-603-828-1401
>>>
>>>> -----Original Message-----
>>>> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf
>>>> Of Gunnar Engelbach
>>>> Sent: Friday, July 12, 2013 11:11 AM
>>>> To: David Harrington
>>>> Cc: 'Sean Turner'; sacm@ietf.org
>>>> Subject: Re: [sacm] Fwd: I-D Action: draft-handt-sacm-alternate-
>>>> architecture-00.txt
>>>>
>>>>
>>>> I like the original.  It's only concerned with the logical components
>>>> that
>>> make
>>>> up SACM -- the flexibility in how they are mixed and match to solve
>>>> real problems is one of its big strengths.
>>>>
>>>> But it's also apparent that this is not being effectively communicated.
>>>>
>>>> I sent some (lousy) drawings to the mailing list a while back trying
>>>> to
>>> capture
>>>> that flexibility -- attached here again for your
> amusement/befuddlement.
>>>>
>>>>
>>>> Do very specific use cases help people understand how these standards
>>>> can be applied?
>>>>
>>>>
>>>> --gun
>>>>
>>>>
>>>>
>>>> On 7/12/2013 10:06 AM, David Harrington wrote:
>>>>> Hi,
>>>>>
>>>>> While I don't fully agree with the original architecture, I find it
>>> easier
>>>>> to understand the intended functionality than in the alternate
>>> architecture.
>>>>>
>>>>> I understand the goal here of showing where the on-the-wire
>>>>> protocols operate between entities.
>>>>> The data flows in the Waltermire architecture do not clearly capture
>>>>> the on-the-wire-ness of the flows, and what sits where in the network.
>>>>> It might be helpful to use both diagrams, combined, to show the
>>>>> network entities and on-the-wire data flows, and then show within
>>>>> the entity
>>>> boxes,
>>>>> the expected functionality provided by each.
>>>>>
>>>>> The new architecture seems focused on a combination firewall/IDS
>>>>> box;
>>>> that
>>>>> seems like a particular use case.
>>>>> As you all know already, I think the scope of the sacm work needs to
>>>>> be narrowed, but this might narrow it too much.
>>>>>
>>>>> (Sean, can you write up a firewall/IDS use case that I can put into
>>>>> the use-cases document for this usage?)
>>>>>
>>>>> David Harrington
>>>>> dbharrington@comcast.net
>>>>> +1-603-828-1401
>>>>>
>>>>>> -----Original Message-----
>>>>>> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On
>>>>>> Behalf
>>>> Of
>>>>>> Sean Turner
>>>>>> Sent: Thursday, July 11, 2013 12:32 PM
>>>>>> To: sacm@ietf.org
>>>>>> Subject: [sacm] Fwd: I-D Action:
>>> draft-handt-sacm-alternate-architecture-
>>>>>> 00.txt
>>>>>>
>>>>>> Food for thought.
>>>>>>
>>>>>> spt
>>>>>> -------- Original Message --------
>>>>>> Subject: I-D Action: draft-handt-sacm-alternate-architecture-00.txt
>>>>>> Date: Thu, 11 Jul 2013 09:26:58 -0700
>>>>>> From: internet-drafts@ietf.org
>>>>>> Reply-To: internet-drafts@ietf.org
>>>>>> To: i-d-announce@ietf.org
>>>>>>
>>>>>>
>>>>>> A New Internet-Draft is available from the on-line Internet-Drafts
>>>>> directories.
>>>>>>
>>>>>>
>>>>>> 	Title           : sacm: Alternate Architecture
>>>>>> 	Author(s)       : Russ Housley
>>>>>>                               Sean Turner
>>>>>> 	Filename        : draft-handt-sacm-alternate-architecture-00.txt
>>>>>> 	Pages           : 5
>>>>>> 	Date            : 2013-07-11
>>>>>>
>>>>>> Abstract:
>>>>>>        This document proposes and alternate architecture for sacm (a
>>>>>>        proposed working group at the time this draft was submitted).
>>>>>>
>>>>>>
>>>>>> The IETF datatracker status page for this draft is:
>>>>>>
>>> https://datatracker.ietf.org/doc/draft-handt-sacm-alternate-architectu
>>> re
>>>>>>
>>>>>> There's also a htmlized version available at:
>>>>>> http://tools.ietf.org/html/draft-handt-sacm-alternate-architecture-
>>>>>> 00
>>>>>>
>>>>>>
>>>>>> Internet-Drafts are also available by anonymous FTP at:
>>>>>> ftp://ftp.ietf.org/internet-drafts/
>>>>>>
>>>>>> _______________________________________________
>>>>>> I-D-Announce mailing list
>>>>>> I-D-Announce@ietf.org
>>>>>> https://www.ietf.org/mailman/listinfo/i-d-announce
>>>>>> Internet-Draft directories: http://www.ietf.org/shadow.html or
>>>>>> ftp://ftp.ietf.org/ietf/1shadow-sites.txt
>>>>>>
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> sacm mailing list
>>>>>> sacm@ietf.org
>>>>>> https://www.ietf.org/mailman/listinfo/sacm
>>>>>
>>>>> _______________________________________________
>>>>> sacm mailing list
>>>>> sacm@ietf.org
>>>>> https://www.ietf.org/mailman/listinfo/sacm
>>>>>
>>>
>

From dbharrington@comcast.net  Sun Jul 21 12:37:41 2013
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Subject: [sacm] Use Cases Style
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Hi,

 

There has been some debate about the amount of detail and the formality of
the format used in our use cases document.

I have argued for IETF-style use cases; Adam has argued for a systems
engineering style, recommending the Martin Fowler format.

 


The IETF approach:


 

I recommended that people look at other IETF Use Case documents to see what
is "normal" for IETF use case documents.

Knowing that everybody is busy, I assumed few if any would actually do so.

So to move the discussion forward, I searched for RFCs with "Use Case" in
the title.

Then  I looked at each, and copied a quote from the text about the purpose
of each document (where available)

 

I then copied in a sample use case from each document.

I was planning to make these into a PowerPoint presentation (I expected that
would be very hard to do, given the space limitations of a slide).

So I chose short examples.

Feel free to look at longer examples if you want.

 

My samples of IETF use cases are in the attached file.


The usability.gov approach
(http://www.usability.gov/how-to-and-tools/methods/use-cases.html)


 

Elements of a Use Case

 

Depending on how in depth and complex you want or need to get, use cases
describe a combination of the following elements:

.Actor - anyone or anything that performs a behavior (who is using the
system)

.Stakeholder - someone or something with vested interests in the behavior of
the system under discussion (SUD)

.Primary Actor - stakeholder who initiates an interaction with the system to
achieve a goal

.Preconditions - what must be true or happen before and after the use case
runs.

.Triggers - this is the event that causes the use case to be initiated.

.Main success scenarios [Basic Flow] - use case in which nothing goes wrong.

.Alternative paths [Alternative Flow] - these paths are a variation on the
main theme. These exceptions are what happen when things go wrong at the
system level.

 

How To Write a Use Case

 

Write the steps in a use case in an easy-to-understand narrative. Kenworthy
(1997) outlines the following steps:

1.       Identify who is going to be using the website.

2.       Pick one of those users.

3.       Define what that user wants to do on the site. Each thing the use
does on the site becomes a use case.

4.       For each use case, decide on the normal course of events when that
user is using the site.

5.       Describe the basic course in the description for the use case.
Describe it in terms of what the user does and what the system does in
response that the user should be aware of.

6.       When the basic course is described, consider alternate courses of
events and add those to "extend" the use case.

7.       Look for commonalities among the use cases. Extract these and note
them as common course use cases.

8.       Repeat the steps 2 through 7 for all other users.

 

Middleweight Laundry Use Case

 

Use Case 1: Do laundry 

Actor: Housekeeper 

Basic Flow: On Wednesdays, the housekeeper reports to the laundry room.  She
sorts the laundry that is there.  Then she washes each load.  She dries each
load. She folds the items that need folding.  She throws away any laundry
item that is irrevocably shrunken, soiled or scorched. 

Alternative Flow 1: If she notices that something is wrinkled, she irons it
and then hangs it on a hanger. 

Alternative Flow 2: If she notices that something is still dirty, she
rewashes it. 

Alternative Flow 3: If she notices that something shrank, she throws it out.

 


Adam's example use case:


Use Case Name: Suspicious Endpoint Behavior

 

Description: 

This Use Case describes the collaboration between specific participants in
an information security system specific to detecting a connection attempt to
a known-bad Internet host by a botnet zombie that has made its way onto an
organization's Information Technology systems.  The primary human actor is
the Security Operations Center Analyst, and the primary software actor is
the configuration assessment tool.  Note, however, the dependencies on other
tools, such as asset management, intrusion detection, and messaging.

 

 

Actors: 

 

   * Security Operations Center (SOC) Analyst, 

   * Information Security Officer, 

   * System Owner

   * Organizational Unit Leader

 

Preconditions:

 

 

   * Organizational Security Policy Exists

   * Security Policy specifies appropriate asset management capabilities
(i.e. categorization of endpoints)

   * Security Policy specifies endpoint configuration baseline for asset
categorization

   * The Organization keeps a list of known-bad Internet hosts

   * The Organization associates owners who are individuals with endpoints

   * The Organization associates organizational units with endpoints

 

Postconditions:

 

   * Endpoint configuration has been assessed [1]

   * Results have been conveyed to scan requester

 

Primary Path:

 

  1. At 03:46 UTC an organization's Network Intrusion Detection System
(NIDS) sees an IP packet with a destination IPv6 address existing on a
blacklist of known botnet command and control (C2) servers.

 

  2. The NIDS sends an alert to the SOC Analyst.

 

  3. The SOC Analyst uses the information captured in the alert (IP packet
and reason for the flag) to look up the endpoint in the organization's asset
inventory system and discovers that the endpoint is a Windows Server 2008 R2
Member Server playing the role of a File Server

 

  4. The SOC Analyst also verifies that the IPv6 address cited by the NIDS
is, in fact, on the blacklist for known C2 servers.

 

  5. At this point, the SOC Analyst switches over to the organization's
configuration assessment tool

 

  6. The SOC Analyst locates the offending endpoint in the configuration
assessment tool's endpoint catalog [2]

 

  7. The SOC Analyst then initiates an immediate and complete endpoint
assessment to determine if the endpoint has experienced any configuration
drift [3].

 

  8. The configuration assessment tool:

 

  9. 

    a. Performs a preliminary asset inventory scan on the offending
endpoint, which results in a list of installed software [4][5]

    b. Performs a comparison between the last known asset inventory and the
present asset inventory and notes any differences

    c. Searches it's local content repository for appropriate configuration
baselines for the operating system of the offending endpoint and for each
installed piece of software

    d. Upon aggregating the set of applicable configuration baselines, the
configuration assessment tool then connects to and queries the
organization's configuration content repository for newer baselines that may
exist.

    e. If a new baseline exists, then it is returned by the configuration
content repository.

 

  10. The configuration management tool, having the set of updated
baselines, initiates a scan against the offending host, which yields a
result set.

 

  11. The configuration management tool displays scan results to the SOC
Analyst, which show that three new pieces of software have been installed on
the offending endpoint where one piece of software is not on the authorized
software list, and that several configuration items were out of compliance
with the organization's established baselines.

 

  12. The SOC Analyst reviews the information for accuracy and to plan next
steps before sending the report to the responsible Information Security
Officer, accountable System Owner, and the Organizational Unit Leader.

 

 

A Note On Alternative Paths, Preconditions, and Postconditions:

There are likely to be many points of optimization and optional paths.  For
example, a configuration assessment tool might provide a "quick glance" look
at the most recent scan history for the offending endpoint.  A SOC Analyst
might then elect not to run a new scan (i.e. the offending endpoint is known
to be out of compliance, so why run a new scan?).  Another point might be
that the offending endpoint is, at present, not authorized to be on the
network, in which case it is very likely not to exist in the configuration
assessment tool's endpoint catalog.

 

 

As with alternative paths, pre-/post-conditions can vary widely.  Consider
that this description likely represents an organization on the mature side
of managing information security.  Many organizations do not have a Security
Operations Center, nor do they necessarily monitor their network.  It may be
the case that a log management process has detected the blacklisted
connection attempt  through audit trail monitoring.  Or, it may be the case
that a shared indicator of compromise has been used to detect the offending
endpoint.

 

 

-------------------

[1] I am assuming at this point that "configuration assessment" has been
defined and will be understood by the reader.  What I consider to be
"assessment" is that the baseline has been obtained, send to the scanning
implementation, endpoint configuration item values have been harvested,
endpoint configuration item values have been compared against baseline, and
results stored/forwarded as appropriate for the use case.

 

 

[2] An "endpoint catalog" is intended to convey nothing more than the notion
that configuration assessment tools are likely to have some method of
listing, enumerating, or aggregating endpoints under configuration
management. 

 

 

[3] It may not be necessary to specify what we mean by "complete" or the
order in which scanning operations take place.  In this particular scenario,
I thought it might be useful to illustrate that "scan levels" exist on a
continuum.  

 

 

[4] Remember that the configuration assessment tool has knowledge of the
offending endpoint so running a preliminary inventory scan is reasonable at
this point.

 

 

[5] The mechanism of scan could be agent-based or remote, so details of how
a scan happens are omitted here.  A more granular partition of the process
is required for further details.

 

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My Comments:


Executive Summary:

The IETF format is what most IETF readers will expect. This format has the
drawback of not being formal, and is not necessarily very complete. If we to
derive requirements from this freehand format, it can be more difficult. But
it is easily readable, so reviewers of our work can understand what we are
trying to accomplish. Use cases of this form help to identify the nature of
the stakeholders involved in our WG. Operators vs vendors, service providers
vs enterprises, managed-device implementers vs management application
developers, and so on. This can help to categorize requirements that exist
for some stakeholders but not all stakeholders.

 

I think the formal approach recommended in usability.gov would be more work
for the editors to lay out the use cases in this formal format, and the
ASCII text required for RFCs makes this much harder than, say Word or HTML
formats.

Usability.gov step 2 says "pick one of the users" to document as the actor.
Each thing the user wants to do becomes a use case, and each possible
alternative action becomes a use case.

Adam's example for Actor includes multiple roles, and then describes a
rather complex use case , including footnotes.

 

Part of my concern is that we have WG contributors coming from multiple
vendors, with possibly multiple products, representing customers from
multiple industry segments.

To fully detail each possible alternative would make it close to impossible
to actually finish this document in a reasonable amount of time.

I suspect Adam combined a number of use cases together in his example, to
simplify things.

However, I cannot figure out how to create English sentences from his
example because he has multiple actors and multiple preconditions and
multiple postconditions, and what seems to be a lot of irrelevant details in
the Primary Path. Is the fact that this happens at 3:46 UTC an important
detail in our design? Or is it an irrelevant detail? Or is it important for
some use cases (such as trying to establish behavior anomalies based on when
a user normally works, or when an attack normally happens?) but not others? 

 

I think the formal approach is over the top for our needs.

The IETF approach seems more appropriate at this point in our work process.

 

 

David Harrington

dbharrington@comcast.net

+1-603-828-1401

 


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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p =
class=3DMsoPlainText>Hi,<o:p></o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p class=3DMsoPlainText>There =
has been some debate about the amount of detail and the formality of the =
format used in our use cases document.<o:p></o:p></p><p =
class=3DMsoPlainText>I have argued for IETF-style use cases; Adam has =
argued for a systems engineering style, recommending the Martin Fowler =
format.<o:p></o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><h2>The IETF =
approach:<o:p></o:p></h2><p class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p =
class=3DMsoPlainText>I recommended that people look at other IETF Use =
Case documents to see what is &quot;normal&quot; for IETF use case =
documents.<o:p></o:p></p><p class=3DMsoPlainText>Knowing that everybody =
is busy, I assumed few if any would actually do so.<o:p></o:p></p><p =
class=3DMsoPlainText>So to move the discussion forward, I searched for =
RFCs with &quot;Use Case&quot; in the title.<o:p></o:p></p><p =
class=3DMsoPlainText>Then&nbsp; I looked at each, and copied a quote =
from the text about the purpose of each document (where =
available)<o:p></o:p></p><p class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p =
class=3DMsoPlainText>I then copied in a sample use case from each =
document.<o:p></o:p></p><p class=3DMsoPlainText>I was planning to make =
these into a PowerPoint presentation (I expected that would be very hard =
to do, given the space limitations of a slide).<o:p></o:p></p><p =
class=3DMsoPlainText>So I chose short examples.<o:p></o:p></p><p =
class=3DMsoPlainText>Feel free to look at longer examples if you =
want.<o:p></o:p></p><p class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p =
class=3DMsoPlainText>My samples of IETF use cases are in the attached =
file.<o:p></o:p></p><h2>The usability.gov approach =
(http://www.usability.gov/how-to-and-tools/methods/use-cases.html)<o:p></=
o:p></h2><p class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p =
class=3DMsoPlainText>Elements of a Use Case<o:p></o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p =
class=3DMsoPlainText>Depending on how in depth and complex you want or =
need to get, use cases describe a combination of the following =
elements:<o:p></o:p></p><p class=3DMsoPlainText>&#8226;Actor &#8211; =
anyone or anything that performs a behavior (who is using the =
system)<o:p></o:p></p><p class=3DMsoPlainText>&#8226;Stakeholder &#8211; =
someone or something with vested interests in the behavior of the system =
under discussion (SUD)<o:p></o:p></p><p =
class=3DMsoPlainText>&#8226;Primary Actor &#8211; stakeholder who =
initiates an interaction with the system to achieve a =
goal<o:p></o:p></p><p class=3DMsoPlainText>&#8226;Preconditions &#8211; =
what must be true or happen before and after the use case =
runs.<o:p></o:p></p><p class=3DMsoPlainText>&#8226;Triggers &#8211; this =
is the event that causes the use case to be initiated.<o:p></o:p></p><p =
class=3DMsoPlainText>&#8226;Main success scenarios [Basic Flow] &#8211; =
use case in which nothing goes wrong.<o:p></o:p></p><p =
class=3DMsoPlainText>&#8226;Alternative paths [Alternative Flow] &#8211; =
these paths are a variation on the main theme. These exceptions are what =
happen when things go wrong at the system level.<o:p></o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>How To =
Write a Use Case<o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>Write the =
steps in a use case in an easy-to-understand narrative. Kenworthy (1997) =
outlines the following steps:<o:p></o:p></p><p class=3DMsoListParagraph =
style=3D'text-indent:-.25in;mso-list:l0 level1 lfo2'><![if =
!supportLists]><span style=3D'mso-list:Ignore'>1.<span =
style=3D'font:7.0pt "Times New =
Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span><![endif]>Identify who is going to be using the =
website.<o:p></o:p></p><p class=3DMsoListParagraph =
style=3D'text-indent:-.25in;mso-list:l0 level1 lfo2'><![if =
!supportLists]><span style=3D'mso-list:Ignore'>2.<span =
style=3D'font:7.0pt "Times New =
Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span><![endif]>Pick one of those users.<o:p></o:p></p><p =
class=3DMsoListParagraph style=3D'text-indent:-.25in;mso-list:l0 level1 =
lfo2'><![if !supportLists]><span style=3D'mso-list:Ignore'>3.<span =
style=3D'font:7.0pt "Times New =
Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span><![endif]>Define what that user wants to do on the site. =
Each thing the use does on the site becomes a use case.<o:p></o:p></p><p =
class=3DMsoListParagraph style=3D'text-indent:-.25in;mso-list:l0 level1 =
lfo2'><![if !supportLists]><span style=3D'mso-list:Ignore'>4.<span =
style=3D'font:7.0pt "Times New =
Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span></span><![endif]>For =
each use case, decide on the normal course of events when that user is =
using the site.<o:p></o:p></p><p class=3DMsoListParagraph =
style=3D'text-indent:-.25in;mso-list:l0 level1 lfo2'><![if =
!supportLists]><span style=3D'mso-list:Ignore'>5.<span =
style=3D'font:7.0pt "Times New =
Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span><![endif]>Describe the basic course in the description for =
the use case. Describe it in terms of what the user does and what the =
system does in response that the user should be aware =
of.<o:p></o:p></p><p class=3DMsoListParagraph =
style=3D'text-indent:-.25in;mso-list:l0 level1 lfo2'><![if =
!supportLists]><span style=3D'mso-list:Ignore'>6.<span =
style=3D'font:7.0pt "Times New =
Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span><![endif]>When the basic course is described, consider =
alternate courses of events and add those to &quot;extend&quot; the use =
case.<o:p></o:p></p><p class=3DMsoListParagraph =
style=3D'text-indent:-.25in;mso-list:l0 level1 lfo2'><![if =
!supportLists]><span style=3D'mso-list:Ignore'>7.<span =
style=3D'font:7.0pt "Times New =
Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span><![endif]>Look for commonalities among the use cases. =
Extract these and note them as common course use cases.<o:p></o:p></p><p =
class=3DMsoListParagraph style=3D'text-indent:-.25in;mso-list:l0 level1 =
lfo2'><![if !supportLists]><span style=3D'mso-list:Ignore'>8.<span =
style=3D'font:7.0pt "Times New =
Roman"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
</span></span><![endif]>Repeat the steps 2 through 7 for all other =
users.<o:p></o:p></p><p class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p =
class=3DMsoPlainText>Middleweight Laundry Use Case<o:p></o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p class=3DMsoPlainText>Use =
Case 1: Do laundry <o:p></o:p></p><p class=3DMsoPlainText>Actor: =
Housekeeper <o:p></o:p></p><p class=3DMsoPlainText>Basic Flow: On =
Wednesdays, the housekeeper reports to the laundry room.&nbsp; She sorts =
the laundry that is there.&nbsp; Then she washes each load.&nbsp; She =
dries each load. She folds the items that need folding.&nbsp; She throws =
away any laundry item that is irrevocably shrunken, soiled or scorched. =
<o:p></o:p></p><p class=3DMsoPlainText>Alternative Flow 1: If she =
notices that something is wrinkled, she irons it and then hangs it on a =
hanger. <o:p></o:p></p><p class=3DMsoPlainText>Alternative Flow 2: If =
she notices that something is still dirty, she rewashes it. =
<o:p></o:p></p><p class=3DMsoPlainText>Alternative Flow 3: If she =
notices that something shrank, she throws it out.<o:p></o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><h2>Adam's example use =
case:<o:p></o:p></h2><p class=3DMsoPlainText>Use Case Name: Suspicious =
Endpoint Behavior<o:p></o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p =
class=3DMsoPlainText>Description: <o:p></o:p></p><p =
class=3DMsoPlainText>This Use Case describes the collaboration between =
specific participants in an information security system specific to =
detecting a connection attempt to a known-bad Internet host by a botnet =
zombie that has made its way onto an organization's Information =
Technology systems.&nbsp; The primary human actor is the Security =
Operations Center Analyst, and the primary software actor is the =
configuration assessment tool.&nbsp; Note, however, the dependencies on =
other tools, such as asset management, intrusion detection, and =
messaging.<o:p></o:p></p><p class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p =
class=3DMsoPlainText>Actors: <o:p></o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p =
class=3DMsoPlainText>&nbsp;&nbsp; * Security Operations Center (SOC) =
Analyst, <o:p></o:p></p><p class=3DMsoPlainText>&nbsp;&nbsp;&nbsp;* =
Information Security Officer, <o:p></o:p></p><p =
class=3DMsoPlainText>&nbsp;&nbsp;&nbsp;* System Owner<o:p></o:p></p><p =
class=3DMsoPlainText>&nbsp;&nbsp; * Organizational Unit =
Leader<o:p></o:p></p><p class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p =
class=3DMsoPlainText>Preconditions:<o:p></o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p =
class=3DMsoPlainText>&nbsp;&nbsp; * Organizational Security Policy =
Exists<o:p></o:p></p><p class=3DMsoPlainText>&nbsp;&nbsp; * Security =
Policy specifies appropriate asset management capabilities (i.e. =
categorization of endpoints)<o:p></o:p></p><p =
class=3DMsoPlainText>&nbsp;&nbsp; * Security Policy specifies endpoint =
configuration baseline for asset categorization<o:p></o:p></p><p =
class=3DMsoPlainText>&nbsp;&nbsp; * The Organization keeps a list of =
known-bad Internet hosts<o:p></o:p></p><p =
class=3DMsoPlainText>&nbsp;&nbsp; * The Organization associates owners =
who are individuals with endpoints<o:p></o:p></p><p =
class=3DMsoPlainText>&nbsp;&nbsp; * The Organization associates =
organizational units with endpoints<o:p></o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p =
class=3DMsoPlainText>Postconditions:<o:p></o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p =
class=3DMsoPlainText>&nbsp;&nbsp; * Endpoint configuration has been =
assessed [1]<o:p></o:p></p><p class=3DMsoPlainText>&nbsp;&nbsp; * =
Results have been conveyed to scan requester<o:p></o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p =
class=3DMsoPlainText>Primary Path:<o:p></o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p class=3DMsoPlainText>&nbsp; =
1. At 03:46 UTC an organization's Network Intrusion Detection System =
(NIDS) sees an IP packet with a destination IPv6 address existing on a =
blacklist of known botnet command and control (C2) =
servers.<o:p></o:p></p><p class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p =
class=3DMsoPlainText>&nbsp; 2. The NIDS sends an alert to the SOC =
Analyst.<o:p></o:p></p><p class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p =
class=3DMsoPlainText>&nbsp; 3. The SOC Analyst uses the information =
captured in the alert (IP packet and reason for the flag) to look up the =
endpoint in the organization's asset inventory system and discovers that =
the endpoint is a Windows Server 2008 R2 Member Server playing the role =
of a File Server<o:p></o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p class=3DMsoPlainText>&nbsp; =
4. The SOC Analyst also verifies that the IPv6 address cited by the NIDS =
is, in fact, on the blacklist for known C2 servers.<o:p></o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p class=3DMsoPlainText>&nbsp; =
5. At this point, the SOC Analyst switches over to the organization's =
configuration assessment tool<o:p></o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p class=3DMsoPlainText>&nbsp; =
6. The SOC Analyst locates the offending endpoint in the configuration =
assessment tool's endpoint catalog [2]<o:p></o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p class=3DMsoPlainText>&nbsp; =
7. The SOC Analyst then initiates an immediate and complete endpoint =
assessment to determine if the endpoint has experienced any =
configuration drift [3].<o:p></o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p class=3DMsoPlainText>&nbsp; =
8. The configuration assessment tool:<o:p></o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p class=3DMsoPlainText>&nbsp; =
9. <o:p></o:p></p><p class=3DMsoPlainText>&nbsp;&nbsp;&nbsp;&nbsp;a. =
Performs a preliminary asset inventory scan on the offending endpoint, =
which results in a list of installed software [4][5]<o:p></o:p></p><p =
class=3DMsoPlainText>&nbsp;&nbsp;&nbsp; b. Performs a comparison between =
the last known asset inventory and the present asset inventory and notes =
any differences<o:p></o:p></p><p class=3DMsoPlainText>&nbsp;&nbsp;&nbsp; =
c. Searches it's local content repository for appropriate configuration =
baselines for the operating system of the offending endpoint and for =
each installed piece of software<o:p></o:p></p><p =
class=3DMsoPlainText>&nbsp;&nbsp;&nbsp; d. Upon aggregating the set of =
applicable configuration baselines, the configuration assessment tool =
then connects to and queries the organization's configuration content =
repository for newer baselines that may exist.<o:p></o:p></p><p =
class=3DMsoPlainText>&nbsp;&nbsp;&nbsp; e. If a new baseline exists, =
then it is returned by the configuration content =
repository.<o:p></o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p class=3DMsoPlainText>&nbsp; =
10. The configuration management tool, having the set of updated =
baselines, initiates a scan against the offending host, which yields a =
result set.<o:p></o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p class=3DMsoPlainText>&nbsp; =
11. The configuration management tool displays scan results to the SOC =
Analyst, which show that three new pieces of software have been =
installed on the offending endpoint where one piece of software is not =
on the authorized software list, and that several configuration items =
were out of compliance with the organization's established =
baselines.<o:p></o:p></p><p class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p =
class=3DMsoPlainText>&nbsp; 12. The SOC Analyst reviews the information =
for accuracy and to plan next steps before sending the report to the =
responsible Information Security Officer, accountable System Owner, and =
the Organizational Unit Leader.<o:p></o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p class=3DMsoPlainText>A Note =
On Alternative Paths, Preconditions, and =
Postconditions:<o:p></o:p></p><p class=3DMsoPlainText>There are likely =
to be many points of optimization and optional paths.&nbsp; For example, =
a configuration assessment tool might provide a &quot;quick glance&quot; =
look at the most recent scan history for the offending endpoint.&nbsp; A =
SOC Analyst might then elect not to run a new scan (i.e. the offending =
endpoint is known to be out of compliance, so why run a new =
scan?).&nbsp; Another point might be that the offending endpoint is, at =
present, not authorized to be on the network, in which case it is very =
likely not to exist in the configuration assessment tool's endpoint =
catalog.<o:p></o:p></p><p class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p class=3DMsoPlainText>As =
with alternative paths, pre-/post-conditions can vary widely.&nbsp; =
Consider that this description likely represents an organization on the =
mature side of managing information security.&nbsp; Many organizations =
do not have a Security Operations Center, nor do they necessarily =
monitor their network.&nbsp; It may be the case that a log management =
process has detected the blacklisted connection attempt&nbsp; through =
audit trail monitoring.&nbsp; Or, it may be the case that a shared =
indicator of compromise has been used to detect the offending =
endpoint.<o:p></o:p></p><p class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p =
class=3DMsoPlainText>-------------------<o:p></o:p></p><p =
class=3DMsoPlainText>[1] I am assuming at this point that =
&quot;configuration assessment&quot; has been defined and will be =
understood by the reader.&nbsp; What I consider to be =
&quot;assessment&quot; is that the baseline has been obtained, send to =
the scanning implementation, endpoint configuration item values have =
been harvested, endpoint configuration item values have been compared =
against baseline, and results stored/forwarded as appropriate for the =
use case.<o:p></o:p></p><p class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p class=3DMsoPlainText>[2] An =
&quot;endpoint catalog&quot; is intended to convey nothing more than the =
notion that configuration assessment tools are likely to have some =
method of listing, enumerating, or aggregating endpoints under =
configuration management. <o:p></o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p class=3DMsoPlainText>[3] It =
may not be necessary to specify what we mean by &quot;complete&quot; or =
the order in which scanning operations take place.&nbsp; In this =
particular scenario, I thought it might be useful to illustrate that =
&quot;scan levels&quot; exist on a continuum.&nbsp; <o:p></o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p class=3DMsoPlainText>[4] =
Remember that the configuration assessment tool has knowledge of the =
offending endpoint so running a preliminary inventory scan is reasonable =
at this point.<o:p></o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p class=3DMsoPlainText>[5] =
The mechanism of scan could be agent-based or remote, so details of how =
a scan happens are omitted here.&nbsp; A more granular partition of the =
process is required for further details.<o:p></o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p class=3DMsoPlainText>This =
message and attachments may contain confidential information.&nbsp; If =
it appears that this message was sent to you by mistake, any retention, =
dissemination, distribution or copying of this message and attachments =
is strictly prohibited.&nbsp; Please notify the sender immediately and =
permanently delete the message and any attachments.<o:p></o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><h2>My =
Comments:<o:p></o:p></h2><p class=3DMsoNormal>Executive =
Summary:<o:p></o:p></p><p class=3DMsoNormal>The IETF format is what most =
IETF readers will expect. This format has the drawback of not being =
formal, and is not necessarily very complete. If we to derive =
requirements from this freehand format, it can be more difficult. But it =
is easily readable, so reviewers of our work can understand what we are =
trying to accomplish. Use cases of this form help to identify the nature =
of the stakeholders involved in our WG. Operators vs vendors, service =
providers vs enterprises, managed-device implementers vs management =
application developers, and so on. This can help to categorize =
requirements that exist for some stakeholders but not all =
stakeholders.<o:p></o:p></p><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoNormal>I think the formal approach recommended in =
usability.gov would be more work for the editors to lay out the use =
cases in this formal format, and the ASCII text required for RFCs makes =
this much harder than, say Word or HTML formats.<o:p></o:p></p><p =
class=3DMsoNormal>Usability.gov step 2 says &#8220;pick one of the =
users&#8221; to document as the actor. Each thing the user wants to do =
becomes a use case, and each possible alternative action becomes a use =
case.<o:p></o:p></p><p class=3DMsoNormal>Adam&#8217;s example for Actor =
includes multiple roles, and then describes a rather complex use case , =
including footnotes.<o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>Part of my =
concern is that we have WG contributors coming from multiple vendors, =
with possibly multiple products, representing customers from multiple =
industry segments.<o:p></o:p></p><p class=3DMsoNormal>To fully detail =
each possible alternative would make it close to impossible to actually =
finish this document in a reasonable amount of time.<o:p></o:p></p><p =
class=3DMsoNormal>I suspect Adam combined a number of use cases together =
in his example, to simplify things.<o:p></o:p></p><p =
class=3DMsoNormal>However, I cannot figure out how to create English =
sentences from his example because he has multiple actors and multiple =
preconditions and multiple postconditions, and what seems to be a lot of =
irrelevant details in the Primary Path. Is the fact that this happens at =
3:46 UTC an important detail in our design? Or is it an irrelevant =
detail? Or is it important for some use cases (such as trying to =
establish behavior anomalies based on when a user normally works, or =
when an attack normally happens?) but not others? <o:p></o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>I think =
the formal approach is over the top for our needs.<o:p></o:p></p><p =
class=3DMsoNormal>The IETF approach seems more appropriate at this point =
in our work process.<o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p><p class=3DMsoPlainText>David =
Harrington<o:p></o:p></p><p =
class=3DMsoPlainText>dbharrington@comcast.net<o:p></o:p></p><p =
class=3DMsoPlainText>+1-603-828-1401<o:p></o:p></p><p =
class=3DMsoPlainText><o:p>&nbsp;</o:p></p></div></body></html>
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</head>

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style=3D'tab-interval:.5in'>

<div class=3DWordSection1>

<h1>A Review of Uses Cases in RFCs</h1>

<table class=3DMsoNormalTable border=3D1 cellspacing=3D0 cellpadding=3D0
 style=3D'border-collapse:collapse;border:none;mso-border-alt:solid =
#7F7F7F .75pt;
 mso-yfti-tbllook:1184'>
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1.0pt;
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.75pt;
  mso-border-left-alt:solid #7F7F7F .75pt;padding:.75pt .75pt .75pt =
.75pt'>
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style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'><a
  href=3D"http://datatracker.ietf.org/doc/rfc3752/">RFC 3752</a> <br>
  (<a =
href=3D"http://datatracker.ietf.org/doc/draft-ietf-opes-scenarios/">draft=
-<span
  class=3DSpellE>ietf</span>-<span =
class=3DSpellE>opes</span>-scenarios</a>) <o:p></o:p></span></p>
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1.0pt;mso-border-top-alt:
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style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>Open Pluggable Edge =
Services
  (OPES) Use Cases and Deployment Scenarios<o:p></o:p></span></p>
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style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>2004-04 =
<o:p></o:p></span></p>
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  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>Ned Freed =
<o:p></o:p></span></p>
  </td>
 </tr>
 <tr style=3D'mso-yfti-irow:1'>
  <td style=3D'border:none;border-left:solid #7F7F7F =
1.0pt;mso-border-left-alt:
  solid #7F7F7F .75pt;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'><a
  href=3D"http://datatracker.ietf.org/doc/rfc4496/">RFC 4496</a> <br>
  (<a =
href=3D"http://datatracker.ietf.org/doc/draft-ietf-opes-smtp-use-cases/">=
draft-<span
  class=3DSpellE>ietf</span>-<span class=3DSpellE>opes</span>-<span =
class=3DSpellE>smtp</span>-use-cases</a>)
  <o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>Open Pluggable Edge =
Services
  (OPES) SMTP Use Cases<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>2006-05 =
<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>RFC 4496 (Informational) =
<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'></td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'></td>
  <td style=3D'border:none;border-right:solid #7F7F7F =
1.0pt;mso-border-right-alt:
  solid #7F7F7F .75pt;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>Ted <span =
class=3DSpellE>Hardie</span>
  <o:p></o:p></span></p>
  </td>
 </tr>
 <tr style=3D'mso-yfti-irow:2'>
  <td style=3D'border:none;border-left:solid #7F7F7F =
1.0pt;mso-border-left-alt:
  solid #7F7F7F .75pt;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'><a
  href=3D"http://datatracker.ietf.org/doc/rfc5344/">RFC 5344</a> <br>
  (<a
  =
href=3D"http://datatracker.ietf.org/doc/draft-ietf-speermint-consolidated=
-presence-im-usecases/">draft-<span
  class=3DSpellE>ietf</span>-<span =
class=3DSpellE>speermint</span>-consolidated-presence-<span
  class=3DSpellE>im</span>-<span class=3DSpellE>usecases</span></a>) =
<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>Presence and Instant =
Messaging
  Peering Use Cases<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>2008-10 =
<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>RFC 5344 (Informational) =
<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'></td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'></td>
  <td style=3D'border:none;border-right:solid #7F7F7F =
1.0pt;mso-border-right-alt:
  solid #7F7F7F .75pt;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>Jon Peterson =
<o:p></o:p></span></p>
  </td>
 </tr>
 <tr style=3D'mso-yfti-irow:3'>
  <td style=3D'border:none;border-left:solid #7F7F7F =
1.0pt;mso-border-left-alt:
  solid #7F7F7F .75pt;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'><a
  href=3D"http://datatracker.ietf.org/doc/rfc6294/">RFC 6294</a> <br>
  (<a =
href=3D"http://datatracker.ietf.org/doc/draft-hu-flow-label-cases/">draft=
-<span
  class=3DSpellE>hu</span>-flow-label-cases</a>) <o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>Survey of Proposed Use =
Cases for
  the IPv6 Flow Label<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>2011-06 =
<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>RFC 6294 (Informational) =
<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'></td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'></td>
  <td style=3D'border:none;border-right:solid #7F7F7F =
1.0pt;mso-border-right-alt:
  solid #7F7F7F .75pt;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span class=3DSpellE><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>Jari</span></span><span
  =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-fo=
nt-family:
  "Times New Roman"'> <span class=3DSpellE>Arkko</span> =
<o:p></o:p></span></p>
  </td>
 </tr>
 <tr style=3D'mso-yfti-irow:4'>
  <td style=3D'border:none;border-left:solid #7F7F7F =
1.0pt;mso-border-left-alt:
  solid #7F7F7F .75pt;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'><a
  href=3D"http://datatracker.ietf.org/doc/rfc6341/">RFC 6341</a> <br>
  (<a =
href=3D"http://datatracker.ietf.org/doc/draft-ietf-siprec-req/">draft-<sp=
an
  class=3DSpellE>ietf</span>-<span class=3DSpellE>siprec-req</span></a>) =
<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>Use Cases and Requirements =
for
  SIP-Based Media Recording (SIPREC)<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>2011-08 =
<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>RFC 6341 (Informational) =
<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'></td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'></td>
  <td style=3D'border:none;border-right:solid #7F7F7F =
1.0pt;mso-border-right-alt:
  solid #7F7F7F .75pt;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>Gonzalo Camarillo =
<o:p></o:p></span></p>
  </td>
 </tr>
 <tr style=3D'mso-yfti-irow:5'>
  <td style=3D'border:none;border-left:solid #7F7F7F =
1.0pt;mso-border-left-alt:
  solid #7F7F7F .75pt;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'><a
  href=3D"http://datatracker.ietf.org/doc/rfc6394/">RFC 6394</a> <br>
  (<a =
href=3D"http://datatracker.ietf.org/doc/draft-ietf-dane-use-cases/">draft=
-<span
  class=3DSpellE>ietf</span>-<span =
class=3DSpellE>dane</span>-use-cases</a>) <o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>Use Cases and Requirements =
for
  DNS-Based Authentication of Named Entities =
(DANE)<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>2011-10 =
<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>RFC 6394 (Informational) =
<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'></td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'></td>
  <td style=3D'border:none;border-right:solid #7F7F7F =
1.0pt;mso-border-right-alt:
  solid #7F7F7F .75pt;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>Stephen Farrell =
<o:p></o:p></span></p>
  </td>
 </tr>
 <tr style=3D'mso-yfti-irow:6'>
  <td style=3D'border:none;border-left:solid #7F7F7F =
1.0pt;mso-border-left-alt:
  solid #7F7F7F .75pt;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'><a
  href=3D"http://datatracker.ietf.org/doc/rfc6405/">RFC 6405</a> <br>
  (<a
  =
href=3D"http://datatracker.ietf.org/doc/draft-ietf-speermint-voip-consoli=
dated-usecases/">draft-<span
  class=3DSpellE>ietf</span>-<span class=3DSpellE>speermint</span>-<span
  class=3DSpellE>voip</span>-consolidated-<span =
class=3DSpellE>usecases</span></a>)
  <o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>Voice over IP (VoIP) SIP =
Peering
  Use Cases<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>2011-11 =
<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>RFC 6405 (Informational) =
<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'></td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'></td>
  <td style=3D'border:none;border-right:solid #7F7F7F =
1.0pt;mso-border-right-alt:
  solid #7F7F7F .75pt;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>Gonzalo Camarillo =
<o:p></o:p></span></p>
  </td>
 </tr>
 <tr style=3D'mso-yfti-irow:7'>
  <td style=3D'border:none;border-left:solid #7F7F7F =
1.0pt;mso-border-left-alt:
  solid #7F7F7F .75pt;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'><a
  href=3D"http://datatracker.ietf.org/doc/rfc6461/">RFC 6461</a> <br>
  (<a
  =
href=3D"http://datatracker.ietf.org/doc/draft-ietf-drinks-usecases-requir=
ements/">draft-<span
  class=3DSpellE>ietf</span>-drinks-<span =
class=3DSpellE>usecases</span>-requirements</a>)
  <o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>Data for Reachability of
  Inter-/Intra-<span class=3DSpellE>NetworK</span> SIP (DRINKS) Use =
Cases and
  Protocol Requirements<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>2012-01 =
<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>RFC 6461 (Informational) =
<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'></td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'></td>
  <td style=3D'border:none;border-right:solid #7F7F7F =
1.0pt;mso-border-right-alt:
  solid #7F7F7F .75pt;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>Gonzalo Camarillo =
<o:p></o:p></span></p>
  </td>
 </tr>
 <tr style=3D'mso-yfti-irow:8'>
  <td style=3D'border:none;border-left:solid #7F7F7F =
1.0pt;mso-border-left-alt:
  solid #7F7F7F .75pt;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'><a
  href=3D"http://datatracker.ietf.org/doc/rfc6770/">RFC 6770</a> <br>
  (<a =
href=3D"http://datatracker.ietf.org/doc/draft-ietf-cdni-use-cases/">draft=
-<span
  class=3DSpellE>ietf</span>-<span =
class=3DSpellE>cdni</span>-use-cases</a>) <o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>Use Cases for Content =
Delivery
  Network Interconnection<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>2012-11 =
<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>RFC 6770 (Informational) =
<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'></td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'><a
  =
href=3D"http://datatracker.ietf.org/ipr/search?option=3Ddocument_search&a=
mp;id_document_tag=3Ddraft-ietf-cdni-use-cases">1
  </a><o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;border-right:solid #7F7F7F =
1.0pt;mso-border-right-alt:
  solid #7F7F7F .75pt;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>Martin Stiemerling =
<o:p></o:p></span></p>
  </td>
 </tr>
 <tr style=3D'mso-yfti-irow:9'>
  <td style=3D'border:none;border-left:solid #7F7F7F =
1.0pt;mso-border-left-alt:
  solid #7F7F7F .75pt;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'><a
  href=3D"http://datatracker.ietf.org/doc/rfc6789/">RFC 6789</a> <br>
  (<a =
href=3D"http://datatracker.ietf.org/doc/draft-ietf-conex-concepts-uses/">=
draft-<span
  class=3DSpellE>ietf</span>-<span =
class=3DSpellE>conex</span>-concepts-uses</a>) <o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>Congestion Exposure (<span
  class=3DSpellE>ConEx</span>) Concepts and Use =
Cases<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>2012-12 =
<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>RFC 6789 (Informational) =
<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'></td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'></td>
  <td style=3D'border:none;border-right:solid #7F7F7F =
1.0pt;mso-border-right-alt:
  solid #7F7F7F .75pt;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>Wesley Eddy =
<o:p></o:p></span></p>
  </td>
 </tr>
 <tr style=3D'mso-yfti-irow:10'>
  <td style=3D'border:none;border-left:solid #7F7F7F =
1.0pt;mso-border-left-alt:
  solid #7F7F7F .75pt;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'><a
  href=3D"http://datatracker.ietf.org/doc/rfc6907/">RFC 6907</a> <br>
  (<a =
href=3D"http://datatracker.ietf.org/doc/draft-ietf-sidr-usecases/">draft-=
<span
  class=3DSpellE>ietf</span>-<span =
class=3DSpellE>sidr-usecases</span></a>) <o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>Use Cases and =
Interpretations of
  Resource Public Key Infrastructure (RPKI) Objects for Issuers and =
Relying
  Parties<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>2013-03 =
<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>RFC 6907 (Informational) =
<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'></td>
  <td style=3D'border:none;padding:.75pt .75pt .75pt .75pt'></td>
  <td style=3D'border:none;border-right:solid #7F7F7F =
1.0pt;mso-border-right-alt:
  solid #7F7F7F .75pt;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>Stewart Bryant <br>
  Alexey <span class=3DSpellE>Melnikov</span> <o:p></o:p></span></p>
  </td>
 </tr>
 <tr style=3D'mso-yfti-irow:11;mso-yfti-lastrow:yes'>
  <td style=3D'border-top:none;border-left:solid #7F7F7F =
1.0pt;border-bottom:
  solid #7F7F7F 1.0pt;border-right:none;mso-border-left-alt:solid =
#7F7F7F .75pt;
  mso-border-bottom-alt:solid #7F7F7F .75pt;padding:.75pt .75pt .75pt =
.75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'><a
  href=3D"http://datatracker.ietf.org/doc/rfc6953/">RFC 6953</a> <br>
  (<a
  =
href=3D"http://datatracker.ietf.org/doc/draft-ietf-paws-problem-stmt-usec=
ases-rqmts/">draft-<span
  class=3DSpellE>ietf</span>-paws-problem-<span =
class=3DSpellE>stmt</span>-<span
  class=3DSpellE>usecases-rqmts</span></a>) <o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;border-bottom:solid #7F7F7F =
1.0pt;mso-border-bottom-alt:
  solid #7F7F7F .75pt;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>Protocol to Access =
White-Space
  (PAWS) Databases: Use Cases and Requirements<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;border-bottom:solid #7F7F7F =
1.0pt;mso-border-bottom-alt:
  solid #7F7F7F .75pt;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>2013-05 =
<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;border-bottom:solid #7F7F7F =
1.0pt;mso-border-bottom-alt:
  solid #7F7F7F .75pt;padding:.75pt .75pt .75pt .75pt'>
  <p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
  normal'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
  mso-fareast-font-family:"Times New Roman"'>RFC 6953 (Informational) =
<o:p></o:p></span></p>
  </td>
  <td style=3D'border:none;border-bottom:solid #7F7F7F =
1.0pt;mso-border-bottom-alt:
  solid #7F7F7F .75pt;padding:.75pt .75pt .75pt .75pt'></td>
  <td style=3D'border:none;border-bottom:solid #7F7F7F =
1.0pt;mso-border-bottom-alt:
  solid #7F7F7F .75pt;padding:.75pt .75pt .75pt .75pt'></td>
  <td style=3D'border-top:none;border-left:none;border-bottom:solid =
#7F7F7F 1.0pt;
  border-right:solid #7F7F7F 1.0pt;mso-border-bottom-alt:solid #7F7F7F =
.75pt;
  mso-border-right-alt:solid #7F7F7F .75pt;padding:.75pt .75pt .75pt =
.75pt'></td>
 </tr>
</table>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal;mso-layout-grid-align:none;text-autospace:none'><span =
style=3D'font-family:
"Courier New"'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal;mso-layout-grid-align:none;text-autospace:none'><span =
style=3D'font-family:
"Courier New"'><o:p>&nbsp;</o:p></span></p>

<h2>3752: open pluggable edge services<o:p></o:p></h2>

<p class=3DMsoNormal =
style=3D'margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt;
margin-left:0in;line-height:normal;mso-layout-grid-align:none;text-autosp=
ace:
none'><span style=3D'font-family:"Courier New"'><span =
style=3D'mso-tab-count:1'>=A0=A0=A0=A0 </span>&quot;</span><span
class=3DGramE><span style=3D'font-size:12.0pt;font-family:"Times New =
Roman","serif"'>examples</span></span><span
style=3D'font-size:12.0pt;font-family:"Times New Roman","serif"'> of =
services in
which Open Pluggable Edge Services (OPES) would be =
useful&quot;</span><span
style=3D'font-family:"Courier New"'><o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal;mso-layout-grid-align:none;text-autospace:none'><span =
style=3D'font-family:
"Courier New"'><span style=3D'mso-tab-count:1'>=A0=A0=A0=A0 =
</span><o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal;mso-layout-grid-align:none;text-autospace:none'><span =
style=3D'font-family:
"Courier New"'>Sample text:<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt;
margin-left:0in;line-height:normal;mso-layout-grid-align:none;text-autosp=
ace:
none'><span style=3D'font-size:12.0pt;font-family:"Times New =
Roman","serif"'>An
OPES processor may modify a service request on behalf of the data =
consumer for
various reasons, such as: <o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt;
margin-left:0in;line-height:normal;mso-layout-grid-align:none;text-autosp=
ace:
none'><span class=3DGramE><span =
style=3D'font-size:12.0pt;font-family:"Times New =
Roman","serif"'>o</span></span><span
style=3D'font-size:12.0pt;font-family:"Times New Roman","serif"'> Owner =
of a Web
access device might need control over what kind of Web content can be =
accessed
with the device, parental control for example. <o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt;
margin-left:0in;line-height:normal;mso-layout-grid-align:none;text-autosp=
ace:
none'><span class=3DGramE><span =
style=3D'font-size:12.0pt;font-family:"Times New =
Roman","serif"'>o</span></span><span
style=3D'font-size:12.0pt;font-family:"Times New Roman","serif"'> =
Organization
may restrict or redirect access to certain web services based on various =
criteria
such as time of the day or the employee access privileges. =
<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt;
margin-left:0in;line-height:normal;mso-layout-grid-align:none;text-autosp=
ace:
none'><span class=3DGramE><span =
style=3D'font-size:12.0pt;font-family:"Times New =
Roman","serif"'>o</span></span><span
style=3D'font-size:12.0pt;font-family:"Times New Roman","serif"'> Hiding =
the data
consumer's identity, user agent, or referrer. <span =
class=3DGramE>o</span> Adding
user preferences or device profile to the service request to get =
personalized
or adapted services. <o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt;
margin-left:0in;line-height:normal;mso-layout-grid-align:none;text-autosp=
ace:
none'><span class=3DGramE><span =
style=3D'font-size:12.0pt;font-family:"Times New =
Roman","serif"'>o</span></span><span
style=3D'font-size:12.0pt;font-family:"Times New Roman","serif"'> =
Blocking or
redirecting a service request due to a corporate policy. An OPES =
processor may
also modify a service request on behalf of the data provider in several =
ways,
such as:<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt;
margin-left:0in;line-height:normal;mso-layout-grid-align:none;text-autosp=
ace:
none'><span style=3D'font-size:12.0pt;font-family:"Times New =
Roman","serif"'><span
style=3D'mso-spacerun:yes'>=A0</span><span class=3DGramE>o</span> =
Redirecting the
request to a different server to reduce the server work load. <span
class=3DGramE>o</span> Redirecting image requests to improve access =
time. <o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal;mso-layout-grid-align:none;text-autospace:none'><span =
style=3D'font-family:
"Courier New"'><o:p>&nbsp;</o:p></span></p>

<h2>4496: OPES SMTP use cases</h2>

<p class=3DMsoNormal style=3D'line-height:14.4pt;tab-stops:45.8pt 91.6pt =
137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt =
549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'><span
style=3D'font-family:"Courier New"'>=93</span><span class=3DGramE><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New =
Roman"'>collection</span></span><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'>
of some typical use cases describing different filtering areas and =
different
actions caused by those filters=94</span><span =
style=3D'font-family:"Courier New"'><o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'>4.1
Security Filters<o:p></o:p></span></p>

<p class=3DMsoNormal style=3D'line-height:14.4pt;tab-stops:45.8pt 91.6pt =
137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt =
549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span>These filters concentrate on =
the email
message body and usually filter the email sections one by one. Email =
sections
(attachments<span class=3DGramE>)that</span> violate the security policy =
(e.g.,
because they contain a virus or contain an unwanted mime type) define an =
event
that can cause a combination of different actions to be =
performed:<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span><span class=3DGramE>o<span
style=3D'mso-spacerun:yes'>=A0 </span>The</span> attachment is replaced =
by an error
message.<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span><span class=3DGramE>o<span
style=3D'mso-spacerun:yes'>=A0 </span>The</span> email is marked by =
inserting a
warning into the subject or the<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0 </span><span =
class=3DGramE>email</span> body.<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span><span class=3DGramE>o<span
style=3D'mso-spacerun:yes'>=A0 </span>An</span> additional header is =
added for
post-processing steps.<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span><span class=3DGramE>o<span
style=3D'mso-spacerun:yes'>=A0 </span>The</span> email storage is =
advised to put
the email into quarantine.<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span><span class=3DGramE>o<span
style=3D'mso-spacerun:yes'>=A0 </span>Notifications</span> are sent to =
sender,
recipients, and/or<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0 </span><span =
class=3DGramE>administrators</span>.<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span><span class=3DGramE>o<span
style=3D'mso-spacerun:yes'>=A0 </span>The</span> incident is reported to =
other
tools such as intrusion<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
normal;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0 </span><span =
class=3DGramE>detection</span>
applications.<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New =
Roman"'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><b><span
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-fo=
nt-family:
"Times New Roman"'>4.4<span class=3DGramE>.<span =
style=3D'mso-spacerun:yes'>=A0
</span>Access</span> Control Filters</span></b><span =
style=3D'font-size:10.0pt;
font-family:"Courier New";mso-fareast-font-family:"Times New =
Roman"'><o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New =
Roman"'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span>These filters operate on the =
values of the
MAIL FROM and RCPT TO<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span><span =
class=3DGramE>commands</span> of the
SMTP dialog.<span style=3D'mso-spacerun:yes'>=A0 </span>They run an =
access control
policy to<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span><span =
class=3DGramE>determine</span> whether a
sender is currently allowed to send a message to<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span><span class=3DGramE>the</span> =
given
recipients.<span style=3D'mso-spacerun:yes'>=A0 </span>The values of =
HELO/EHLO,
AUTH, and STARTTLS<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span><span =
class=3DGramE>commands</span> may also
be applied.<span style=3D'mso-spacerun:yes'>=A0 </span>The result of =
this filter
has a direct<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span><span =
class=3DGramE>influence</span> on the
SMTP response that the OPES processor has to send =
to<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span><span class=3DGramE>its</span> =
peer for the
filtered SMTP command.<o:p></o:p></span></p>

<p class=3DMsoNormal><o:p>&nbsp;</o:p></p>

<h2>5344: Presence and Instant Messaging Peering Use Cases</h2>

<p class=3DMsoNormal style=3D'line-height:14.4pt;tab-stops:45.8pt 91.6pt =
137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt =
549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;
background:white'><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif"'>=93</span><sp=
an
class=3DGramE><span style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:
"Times New Roman"'>captures</span></span><span =
style=3D'font-size:10.0pt;
font-family:"Courier New";mso-fareast-font-family:"Times New Roman"'> =
the way
that presence and Instant Messaging are currently used within =
enterprises and
operator domains.=94<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;
background:white'><b><span =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";
mso-fareast-font-family:"Times New Roman"'>2.1<span class=3DGramE>.<span
style=3D'mso-spacerun:yes'>=A0 </span>Simple</span> <span =
class=3DSpellE>Interdomain</span>
Subscription</span></b><span =
style=3D'font-size:10.0pt;font-family:"Courier New";
mso-fareast-font-family:"Times New Roman"'><o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;
background:white'><span style=3D'font-size:10.0pt;font-family:"Courier =
New";
mso-fareast-font-family:"Times New Roman"'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNoSpacing><span style=3D'mso-spacerun:yes'>=A0=A0 =
</span>Assume two Peer
Networks, Peer Network A and Peer Network B.<span =
style=3D'mso-spacerun:yes'>=A0
</span><span class=3DGramE>User <span
style=3D'mso-spacerun:yes'>=A0</span>Alice@example.com</span> (hosted in =
Peer
Network A) wants to subscribe to user Bob@example.net (hosted in Peer =
Network
B) and get his presence information.<span style=3D'mso-spacerun:yes'>=A0 =
</span>In
order to do so, Alice@example.com could <span class=3DGramE>connect =
<span
style=3D'mso-spacerun:yes'>=A0</span>directly</span> to example.net and =
subscribe
to Bob's presence information. <span =
style=3D'mso-spacerun:yes'>=A0</span>However,
Peer Network B is willing to accept subscriptions and route IMs only =
when they
are coming from its users or from other Peer Networks that Peer Network =
B
trusts.</p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;
background:white'><span style=3D'font-size:10.0pt;font-family:"Courier =
New";
mso-fareast-font-family:"Times New Roman"'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;
background:white'><span style=3D'mso-fareast-font-family:"Times New =
Roman";
mso-bidi-font-family:"Courier New"'><span =
style=3D'mso-spacerun:yes'>=A0=A0 </span>In
reality, what will happen is Peer Network A will connect to <span =
class=3DGramE>Peer
<span style=3D'mso-spacerun:yes'>=A0</span>Network</span> B and send =
Alice's
subscription to Bob via Peer Network B. <span
style=3D'mso-spacerun:yes'>=A0</span>When Peer Network B has new =
information on
Bob, it will send <span =
style=3D'mso-spacerun:yes'>=A0=A0</span>notifications to Peer
Network A, which will pass them to Alice.<o:p></o:p></span></p>

<p class=3DMsoNormal style=3D'line-height:14.4pt;tab-stops:45.8pt 91.6pt =
137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt =
549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;
background:white'><span style=3D'font-size:10.0pt;font-family:"Courier =
New";
mso-fareast-font-family:"Times New Roman"'><o:p>&nbsp;</o:p></span></p>

<h2><span style=3D'mso-fareast-font-family:"Times New Roman"'>6341: =
</span>Use
Cases and Requirements for SIP-Based Media Recording</h2>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'>Use
Case 5: Real-time Recording Controls.<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New =
Roman"'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0 </span>For an active =
Recording Session, privacy
or security reasons may<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0 </span><span =
class=3DGramE>demand</span> not
capturing a specific portion of a conversation.<span =
style=3D'mso-spacerun:yes'>=A0
</span>An<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0 </span><span =
class=3DGramE>example</span> is for
PCI (payment card industry) compliance where =
credit<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0 </span><span =
class=3DGramE>card</span> information
must be protected.<span style=3D'mso-spacerun:yes'>=A0 </span>One =
solution is not
to record<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0 </span><span =
class=3DGramE>a</span> caller
speaking their credit card information.<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New =
Roman"'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0 </span>An example of a =
real-time control is
Pause/Resume.<o:p></o:p></span></p>

<p class=3DMsoNormal style=3D'line-height:14.4pt;tab-stops:45.8pt 91.6pt =
137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt =
549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;
background:white'><span style=3D'font-size:10.0pt;font-family:"Courier =
New"'><o:p>&nbsp;</o:p></span></p>

<h2>6394: <span style=3D'mso-fareast-font-family:"Times New Roman"'>Use =
Cases and
Requirements for DNS-Based Authentication of Named =
Entities<o:p></o:p></span></h2>

<p class=3DMsoNormal style=3D'line-height:14.4pt;tab-stops:45.8pt 91.6pt =
137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt =
549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;
background:white'><span style=3D'font-size:10.0pt;font-family:"Courier =
New";
mso-fareast-font-family:"Times New Roman"'>=93<span =
class=3DGramE>describes</span>
a set of use cases in which the DNS and DNS Security Extensions (DNSSEC) =
could
be used to make assertions that support the TLS authentication =
process.=94<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><b><span
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-fo=
nt-family:
"Times New Roman"'>3.2<span class=3DGramE>.<span =
style=3D'mso-spacerun:yes'>=A0
</span>Service</span> Certificate Constraints</span></b><span =
style=3D'font-size:
10.0pt;font-family:"Courier New";mso-fareast-font-family:"Times New =
Roman"'><o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New =
Roman"'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span>Alice runs a website on =
alice.example.com
and has obtained a certificate from the well-known CA Charlie.<span
style=3D'mso-spacerun:yes'>=A0 </span>She is concerned about additional,
unauthorized certificates being issued by Charlie as well as by other =
CAs.<span
style=3D'mso-spacerun:yes'>=A0 </span>She would like to provide a way =
for visitors
to her site to know that they should expect alice.example.com to present =
a specific
certificate.<span style=3D'mso-spacerun:yes'>=A0 </span>In TLS terms, =
Alice is
letting Bob know that this specific certificate must be the first =
certificate
in the server Certificate message's <span =
class=3DSpellE>certificate_list</span>
structure [RFC5246].<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span>When Bob connects to =
alice.example.com, he
uses this mechanism to verify that the certificate presented by the =
server is
the correct certificate.<span style=3D'mso-spacerun:yes'>=A0 </span>Bob =
also
performs the normal PKIX validation procedure for this certificate, in
particular verifying that the certificate chains to a trust =
anchor.<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New =
Roman"'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span>The security implications for =
this case are
the same as for the &quot;CA Constraints&quot; case =
above.<o:p></o:p></span></p>

<p class=3DMsoNormal style=3D'line-height:14.4pt;tab-stops:45.8pt 91.6pt =
137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt =
549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;
background:white'><span style=3D'font-size:10.0pt;font-family:"Courier =
New";
mso-fareast-font-family:"Times New Roman"'><o:p>&nbsp;</o:p></span></p>

<h2><span style=3D'mso-fareast-font-family:"Times New Roman"'>6405: =
Voice over IP
(VoIP) SIP Peering Use Cases<o:p></o:p></span></h2>

<p class=3DMsoNormal style=3D'line-height:14.4pt;tab-stops:45.8pt 91.6pt =
137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt =
549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;
background:white'><span style=3D'font-size:10.0pt;font-family:"Courier =
New";
mso-fareast-font-family:"Times New Roman"'>=93<span =
class=3DGramE>describes</span>
important Voice over IP (VoIP) use cases for SIP-based [RFC3261] =
peering.<span
style=3D'mso-spacerun:yes'>=A0 </span>These use cases are determined by =
the Session
<span class=3DSpellE>PEERing</span> for Multimedia <span =
class=3DSpellE>INTerconnect</span>
(SPEERMINT) working group and will assist in identifying requirements =
and other
issues to be considered for future resolution by the working =
group.=94<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;
background:white'><span style=3D'font-size:10.0pt;font-family:"Courier =
New";
mso-fareast-font-family:"Times New Roman"'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><b><span
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-fo=
nt-family:
"Times New Roman"'>5.1<span class=3DGramE>.<span =
style=3D'mso-spacerun:yes'>=A0
</span>Static</span> Peering Use Cases</span></b><span =
style=3D'font-size:10.0pt;
font-family:"Courier New";mso-fareast-font-family:"Times New =
Roman"'><o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New =
Roman"'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span>Static peering [RFC5486] =
describes the use
case when two SSPs form a<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span><span =
class=3DGramE>peering</span>
relationship with some form of association established =
prior<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span><span class=3DGramE>to</span> =
the exchange of
traffic.<span style=3D'mso-spacerun:yes'>=A0 </span>Pre-association is a
prerequisite to<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span><span =
class=3DGramE>static</span>
peering.<span style=3D'mso-spacerun:yes'>=A0 </span>Static peering is =
used in cases
when two peers want<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span><span class=3DGramE>a</span> =
consistent and
tightly controlled approach to peering.<span =
style=3D'mso-spacerun:yes'>=A0
</span>In this<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span><span =
class=3DGramE>scenario</span>, a number
of variables, such as an identification method<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span>(<span =
class=3DGramE>remote</span> proxy IP
address) and Quality-of-Service (<span class=3DSpellE>QoS</span>) =
parameters,<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span><span class=3DGramE>can</span> =
be defined
upfront and known by each SSP prior to peering.<o:p></o:p></span></p>

<p class=3DMsoNormal style=3D'line-height:14.4pt;tab-stops:45.8pt 91.6pt =
137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt =
549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;
background:white'><span style=3D'font-size:10.0pt;font-family:"Courier =
New";
mso-fareast-font-family:"Times New Roman"'><o:p>&nbsp;</o:p></span></p>

<h2><span style=3D'mso-fareast-font-family:"Times New Roman"'>6461: =
(DRINKS) Use
Cases and Protocol Requirements<o:p></o:p></span></h2>

<p class=3DMsoNormal style=3D'line-height:14.4pt;tab-stops:45.8pt 91.6pt =
137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt =
549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;
background:white'><span style=3D'font-size:10.0pt;font-family:"Courier =
New";
mso-fareast-font-family:"Times New Roman"'>=93<span =
class=3DGramE>captures</span>
the use cases and associated requirements for<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;
background:white'><span style=3D'font-size:10.0pt;font-family:"Courier =
New";
mso-fareast-font-family:"Times New Roman"'><span =
style=3D'mso-spacerun:yes'>=A0=A0
</span><span class=3DGramE>interfaces</span> that provision session =
establishment
data into Session<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;
background:white'><span style=3D'font-size:10.0pt;font-family:"Courier =
New";
mso-fareast-font-family:"Times New Roman"'><span =
style=3D'mso-spacerun:yes'>=A0=A0
</span>Initiation Protocol (SIP) Service Provider components to assist =
with<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;
background:white'><span style=3D'font-size:10.0pt;font-family:"Courier =
New";
mso-fareast-font-family:"Times New Roman"'><span =
style=3D'mso-spacerun:yes'>=A0=A0
</span><span class=3DGramE>session</span> routing.<span
style=3D'mso-spacerun:yes'>=A0 </span>Specifically, this document =
focuses on the<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;
background:white'><span style=3D'font-size:10.0pt;font-family:"Courier =
New";
mso-fareast-font-family:"Times New Roman"'><span =
style=3D'mso-spacerun:yes'>=A0=A0
</span><span class=3DGramE>provisioning</span> of one such element =
termed the
&quot;registry&quot;.<o:p></o:p></span></p>

<p class=3DMsoNormal style=3D'line-height:14.4pt;tab-stops:45.8pt 91.6pt =
137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt =
549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;
background:white'><span style=3D'font-size:10.0pt;font-family:"Courier =
New";
mso-fareast-font-family:"Times New Roman"'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><b><span
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-fo=
nt-family:
"Times New Roman"'>3.4<span class=3DGramE>.<span =
style=3D'mso-spacerun:yes'>=A0
</span>Category</span>: SED Record Content</span></b><span =
style=3D'font-size:
10.0pt;font-family:"Courier New";mso-fareast-font-family:"Times New =
Roman"'><o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New =
Roman"'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span>UC SED RECORD #<span =
class=3DGramE>1<span
style=3D'mso-spacerun:yes'>=A0 </span>SED</span> Record Content: =
Establishing
interconnects<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0 </span><span class=3DGramE>between</span>
SSPs involves, among other things,<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0 </span><span class=3DGramE>communicating</span>
points of ingress, the service types<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0=A0 </span><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0</sp=
an>(<span class=3DGramE>SIP,</span>
SIPS, etc.) <span class=3DGramE>supported</span> by each point =
of<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0 </span><span class=3DGramE>ingress</span>,
and the relative priority of each point of<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0 </span><span class=3DGramE>ingress</span>
for each service type.<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New =
Roman"'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span>UC SED RECORD #<span =
class=3DGramE>2<span
style=3D'mso-spacerun:yes'>=A0 </span>Time</span>-To-Live (TTL): For =
performance
reasons,<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0 </span><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
</span><span class=3DGramE>querying</span>
SSPs sometimes cache SED that had been<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0 </span><span class=3DGramE>previously</span>
looked up for a given public identifier.<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0 </span>In order to accomplish
this, SSPs sometimes specify<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=
=A0=A0=A0=A0 </span><span class=3DGramE>the</span>
TTL associated with a given SED record.<o:p></o:p></span></p>

<p class=3DMsoNormal style=3D'line-height:14.4pt;tab-stops:45.8pt 91.6pt =
137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt =
549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;
background:white'><span style=3D'font-size:10.0pt;font-family:"Courier =
New";
mso-fareast-font-family:"Times New Roman"'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal style=3D'line-height:14.4pt;tab-stops:45.8pt 91.6pt =
137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt =
549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;
background:white'><span style=3D'font-size:10.0pt;font-family:"Courier =
New";
mso-fareast-font-family:"Times New Roman"'><o:p>&nbsp;</o:p></span></p>

<h2><span style=3D'mso-fareast-font-family:"Times New Roman"'>6770: =
</span>Use
Cases for Content Delivery Network Interconnection</h2>

<p class=3DMsoNormal style=3D'line-height:14.4pt;tab-stops:45.8pt 91.6pt =
137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt =
549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;
background:white'><span style=3D'font-size:10.0pt;font-family:"Courier =
New"'>=93</span><span
class=3DGramE><span style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:
"Times New Roman"'>focuses</span></span><span style=3D'font-size:10.0pt;
font-family:"Courier New";mso-fareast-font-family:"Times New Roman"'> on =
use
cases that correspond to identified industry needs and that are expected =
to be realized
once open interfaces and protocols supporting the <span
style=3D'mso-spacerun:yes'>=A0=A0</span>interconnection of CDNs are =
specified and
implemented.=94<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><b><span
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-fo=
nt-family:
"Times New Roman"'>2.2<span class=3DGramE>.<span =
style=3D'mso-spacerun:yes'>=A0
</span>Inter</span>-Affiliates Interconnection</span></b><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New =
Roman"'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span>The previous section describes =
the case of
geographic extension between CDNs operated by different entities.<span
style=3D'mso-spacerun:yes'>=A0 </span>A large CDN Provider may have =
several
subsidiaries that each <span class=3DGramE>operate</span> their own CDN =
(which may
rely on different CDN technologies, see Section 4.2).<span
style=3D'mso-spacerun:yes'>=A0 </span>In certain circumstances, the CDN =
Provider
needs to make these CDNs interoperate to provide consistent service to =
its <span
class=3DGramE>customers</span> on the whole collective =
footprint.<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New =
Roman"'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New =
Roman"'><o:p>&nbsp;</o:p></span></p>

<h2><span style=3D'mso-fareast-font-family:"Times New Roman"'>6789: =
Congestion
Exposure (<span class=3DSpellE>ConEx</span>) Concepts and Use =
Cases<o:p></o:p></span></h2>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;
background:white'><span style=3D'font-size:10.0pt;font-family:"Courier =
New";
mso-fareast-font-family:"Times New Roman"'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal style=3D'line-height:14.4pt;tab-stops:45.8pt 91.6pt =
137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt =
549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;
background:white'><span style=3D'font-size:10.0pt;font-family:"Courier =
New";
mso-fareast-font-family:"Times New Roman"'>=93<span =
class=3DGramE>focuses</span> on
how the information communicated by the <span =
class=3DSpellE>ConEx</span> marking
can serve as the basis for significantly more efficient and effective =
traffic <span
style=3D'mso-spacerun:yes'>=A0=A0</span>management than what exists on =
the Internet
today.=94<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;
background:white'><span style=3D'font-size:10.0pt;font-family:"Courier =
New";
mso-fareast-font-family:"Times New Roman"'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;
background:white'><span style=3D'font-size:10.0pt;font-family:"Courier =
New";
mso-fareast-font-family:"Times New Roman"'>Sample =
text:<o:p></o:p></span></p>

<p class=3DMsoNormal style=3D'line-height:14.4pt;tab-stops:45.8pt 91.6pt =
137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt =
549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'><span
class=3DGramE><span style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:
"Times New Roman"'>=93<span style=3D'mso-spacerun:yes'>=A0 =
</span>By</span></span><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'>
deploying a congestion <span class=3DSpellE>policer</span> at the BRAS =
location,
the network <span style=3D'mso-spacerun:yes'>=A0=A0</span>operator can =
measure the
congestion-volume created by users within the access nodes and police
misbehaving users before their traffic affects others on the access
network.<span style=3D'mso-spacerun:yes'>=A0 </span>The <span =
class=3DSpellE>policer</span>
would be provisioned with a traffic management policy, perhaps directing =
the BRAS
to drop packets from users that exceed their congestion-volume quotas =
during
times of congestion.<span style=3D'mso-spacerun:yes'>=A0 </span>Those =
users' apps
would be likely to react in the typical way to drops, backing off =
(assuming at
least some use TCP), and thereby lowering the users' congestion-volumes =
back
within the quota limits.<span style=3D'mso-spacerun:yes'>=A0 </span>If =
none of a
user's apps responds, the <span class=3DSpellE>policer</span> would =
continue to
increase focused drops and effectively enforce its own congestion =
control.=94<o:p></o:p></span></p>

<h2><span style=3D'mso-fareast-font-family:"Times New Roman"'>6007: Use =
Cases for
</span>Resource Public Key Infrastructure<span =
style=3D'mso-fareast-font-family:
"Times New Roman"'><o:p></o:p></span></h2>

<p class=3DMsoNormal style=3D'line-height:14.4pt;tab-stops:45.8pt 91.6pt =
137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt =
549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;
background:white'><span style=3D'font-size:10.0pt;font-family:"Courier =
New";
mso-fareast-font-family:"Times New Roman"'>=93<span =
class=3DGramE>describes</span>
a number of use cases together with<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;
background:white'><span style=3D'font-size:10.0pt;font-family:"Courier =
New";
mso-fareast-font-family:"Times New Roman"'><span =
style=3D'mso-spacerun:yes'>=A0=A0
</span><span class=3DGramE>directions</span> and interpretations for
organizations and relying parties<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt 732.8pt;
background:white'><span style=3D'font-size:10.0pt;font-family:"Courier =
New";
mso-fareast-font-family:"Times New Roman"'><span =
style=3D'mso-spacerun:yes'>=A0=A0
</span><span class=3DGramE>when</span> creating or encountering Resource =
Public
Key Infrastructure<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span><span class=3DGramE>(RPKI) =
object scenarios in
the public RPKI.=94</span><o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><b><span
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-fo=
nt-family:
"Times New Roman"'>3.1<span class=3DGramE>.<span =
style=3D'mso-spacerun:yes'>=A0
</span>Single</span> Announcement</span></b><span =
style=3D'font-size:10.0pt;
font-family:"Courier New";mso-fareast-font-family:"Times New =
Roman"'><o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New =
Roman"'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span>An organization (Org A with ASN =
64496) has
been allocated the prefix<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span>10.1.2.0/24.<span =
style=3D'mso-spacerun:yes'>=A0
</span>It wishes to announce the /24 prefix from ASN =
64496<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span><span class=3DGramE>such</span> =
that relying
parties interpret the route as intended.<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New =
Roman"'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span>The desired announcement (and =
organization)
would be:<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New =
Roman"'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0
</span>+----------------------------------------------+<o:p></o:p></span>=
</p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0 </span>| Prefix<span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0=A0=A0=A0=A0 </span>| Origin =
AS<span
style=3D'mso-spacerun:yes'>=A0=A0 </span>| Organization =
|<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0
</span>+----------------------------------------------+<o:p></o:p></span>=
</p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0 </span>| 10.1.2.0/24<span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0 </span>| AS 64496<span
style=3D'mso-spacerun:yes'>=A0=A0=A0 </span>|<span =
style=3D'mso-spacerun:yes'>=A0=A0
</span>Org A<span style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0 =
</span>|<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0 =
</span>+----------------------------------------------+<o:p></o:p></span>=
</p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New =
Roman"'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span>The issuing party should create =
a ROA
containing the following:<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New =
Roman"'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0
</span>+----------------------------------------------+<o:p></o:p></span>=
</p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0 </span>| <span =
class=3DSpellE><span class=3DGramE>asID</span></span><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0 </span>| address<span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 </span>| <span =
class=3DSpellE>maxLength</span><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0 </span>|<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0
</span>+----------------------------------------------+<o:p></o:p></span>=
</p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0 </span>| 64496<span =
style=3D'mso-spacerun:yes'>=A0=A0=A0
</span>| 10.1.2.0/24<span style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0=A0 =
</span>|<span
style=3D'mso-spacerun:yes'>=A0=A0=A0 </span>24<span =
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0=A0=A0=A0
</span>|<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0=A0=A0=A0
</span>+----------------------------------------------+<o:p></o:p></span>=
</p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New =
Roman"'><o:p>&nbsp;</o:p></span></p>

<h2><span style=3D'mso-fareast-font-family:"Times New Roman"'>6953: PAWS =
Use
cases<o:p></o:p></span></h2>

<p class=3DMsoNormal style=3D'line-height:14.4pt;tab-stops:45.8pt 91.6pt =
137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt =
549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'>=93This
document includes the problem statement followed by use cases and =
requirements
associated with the use of white-space spectrum by secondary users via a
database query protocol.=94<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><b><span
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-fo=
nt-family:
"Times New Roman"'>4.1<span class=3DGramE>.<span =
style=3D'mso-spacerun:yes'>=A0
</span>Master</span>-Slave White-Space Networks</span></b><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New =
Roman"'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span>There are a number of common =
scenarios in
which a master white-space<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span><span =
class=3DGramE>device</span> will act as
proxy or mediator for one or more slave devices<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span><span =
class=3DGramE>using</span> its
connection to the Internet to query the database =
for<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span><span =
class=3DGramE>available</span> spectrum
for itself and for one or more slave devices.<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span>These slave devices may be =
fixed or mobile,
in close proximity with<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span><span class=3DGramE>each</span> =
other (indoor
network or urban hotspot), or at a distance (rural<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span><span class=3DGramE>or</span> =
remote
WAN).<span style=3D'mso-spacerun:yes'>=A0 </span>Once slave devices =
switch to
white-space spectrum<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span><span class=3DGramE>for</span> =
their
communications, they may connect through the master to =
the<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span>Internet or use white-space =
spectrum for
intra-network communications<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span><span =
class=3DGramE>only</span>.<span
style=3D'mso-spacerun:yes'>=A0 </span>The master device can continue to =
arbitrate
and control white-<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span><span =
class=3DGramE>space</span>
communications by slave devices, and it may notify them =
when<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span><span class=3DGramE>they</span> =
are required
to change white-space frequencies or cease white-<o:p></o:p></span></p>

<p class=3DMsoNormal =
style=3D'margin-bottom:0in;margin-bottom:.0001pt;line-height:
14.4pt;tab-stops:45.8pt 91.6pt 137.4pt 183.2pt 229.0pt 274.8pt 320.6pt =
366.4pt 412.2pt 458.0pt 503.8pt 549.6pt 595.4pt 641.2pt 687.0pt =
732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New Roman"'><span
style=3D'mso-spacerun:yes'>=A0=A0 </span><span =
class=3DGramE>space</span>
communications.<o:p></o:p></span></p>

<p class=3DMsoNormal style=3D'line-height:14.4pt;tab-stops:45.8pt 91.6pt =
137.4pt 183.2pt 229.0pt 274.8pt 320.6pt 366.4pt 412.2pt 458.0pt 503.8pt =
549.6pt 595.4pt 641.2pt 687.0pt 732.8pt'><span
style=3D'font-size:10.0pt;font-family:"Courier =
New";mso-fareast-font-family:"Times New =
Roman"'><o:p>&nbsp;</o:p></span></p>

</div>

</body>

</html>

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From: "Waltermire, David A." <david.waltermire@nist.gov>
To: Adam Montville <Adam.Montville@cisecurity.org>, "sacm@ietf.org" <sacm@ietf.org>
Thread-Topic: Use Case Discussion: Vulnerable Endpoint Identification
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Subject: Re: [sacm] Use Case Discussion: Vulnerable Endpoint Identification
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Adam,

A few comments.

In general... if our current focus is on endpoint assessment, it seems like=
 much of this goes way beyond our initial scope of focus. Things like knowi=
ng what organizational units have endpoints and who owns these endpoints is=
 important in the broader scope, but is not significant to our constrained =
area of focus.

This raises the questions... should our use cases be scoped to only the cur=
rent area of focus for the working group, or should the use cases identify =
the broader end goal for which our work will play a part?

Other comments are inline.

Thanks,
Dave

> -----Original Message-----
> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf Of
> Adam Montville
> Sent: Monday, July 15, 2013 4:59 PM
> To: sacm@ietf.org
> Subject: [sacm] Use Case Discussion: Vulnerable Endpoint Identification
>=20
> And another...
>=20
>=20
> Use Case Name: Vulnerable Endpoint Identification
>=20
> Description:
> In this use case a zero-day exploit has been discovered in the wild, whic=
h is
> followed by a vulnerability identification entry and indicators of compro=
mise.
> A security engineer is responsible for that portion of a situational resp=
onse
> process that determines how exposed an organization is given the new stat=
e
> of the world.

This seems like two use cases in one.

Vulnerable Endpoint Identification: Typically vulnerability reports identif=
y an executable or library that is vulnerable, or worst case the software t=
hat is vulnerable. This information is used to determine if an organization=
 has one or more endpoints that have exposure to a vulnerability (i.e., wha=
t endpoints are vulnerable?). It is often necessary to know where you are r=
unning vulnerable code and what configurations are in place on the endpoint=
 and upstream devices (e.g., IDS, firewall) that may limit the exposure. Al=
l of this information, along with details on the severity and impact of a v=
ulnerability, is necessary to prioritize remedies.

Compromised Endpoint Identification: Along with knowing if one or more endp=
oints are vulnerable, it is also important to know if you have been comprom=
ised. Indicators of compromise provide details that can be used to identify=
 malware (e.g., file hashes), identify malicious activity (e.g. command and=
 control traffic), presence of unauthorized/malicious configuration items, =
and other indicators. While important, this goes beyond determining organiz=
ational exposure.

>=20
>=20
> Actors:
>=20
>    * System Administrator
>    * Vulnerability Engineer
>    * Security Engineer
>    * System Owner
>    * Information Owner
>=20
>=20
> Preconditions:
>=20
>    * Organizational Security Policy exists
>    * Security Policy specifies appropriate asset management capabilities =
(i.e.
> categorization of endpoints)
>    * Security Policy specifies endpoint configuration baseline for asset
> categorization
>    * Security Policy specifies configuration history retention requiremen=
ts
>    * The Organization associates owners who are individuals with endpoint=
s
>    * The Organization associates organizational units with endpoints
>=20
> Postconditions:
>=20
>    * Appropriate individuals in the organization have a clear understandi=
ng of
> the organization's exposure to and potential impact of the identified 0-d=
ay
>    * Appropriate individuals are taking action to further assess or mitig=
ate the
> organization's posture regarding this 0-day
>=20
>=20
> Primary Path:
>=20
>=20
>   1. [External] 0-day exploit discovery [1]
>=20
>   2. Vulnerability Identification (Vulnerability ID) issued and associate=
d
> information published to an accessible content repository [2]

This applies to Vulnerable Endpoint Identification.

>   3. Indicators of Compromise (IoC) are identified and published to an
> accessible content repository [3]

This applies to Compromised Endpoint Identification.

>   4. Security engineer provides the Vulnerability ID to the Asset Managem=
ent
> System
>=20
>   5. The Asset Management System queries a configured Vulnerability
> Database to obtain a list of affected endpoint classes [4]
>=20
>   6. The Asset Management System returns a list of specific endpoints tha=
t
> can be classified according to the endpoint class list obtained in Step 5=
, which
> either:
>
>   7.
>     a. Presently have affected software installed, or
>     b. Have had affected software installed.

This supports both. Potentially compromised endpoints are those that are vu=
lnerable or may have been vulnerable historically.

>=20
>   8. The Security Engineer exports the list of potentially affected endpo=
ints
>=20
>   9. The Security Engineer initiates a vulnerability scan based on IoCs,
> published vulnerability information, and the potentially affected endpoin=
t
> list.

Is a scan necessary for identification of vulnerable endpoints? If there is=
 datastore that contains the current software inventory of endpoint devices=
, wouldn't it be possible to check the vulnerability information against th=
at data?  Use of a data store seems to be the only effective way of doing t=
his for historically vulnerable software.

Vulnerability scanning has had mixed success in the past.  There has been l=
ittle consensus in what is the best methodology for detecting vulnerable so=
ftware using scans.  Is the software vulnerable if the software is installe=
d?  Is the endpoint vulnerable if the software is uninstalled and a vulnera=
ble library or other component is still present?

>   10. The Vulnerability Scanner derives a set of vulnerability checks (i.=
e.
> assessments) to perform on each listed endpoint based on information
> associated with the provided Vulnerability ID and IoCs.

Again, I am not sure vulnerability checks are the best approach to identify=
 vulnerable endpoints.  This is getting into architecture and implementatio=
n details. It might be better for the endpoint to send file lists with hash=
es which get stored is a data store.  Deltas can be used to reduce the over=
all volume.  We need some discussion around the different approaches that c=
an be used here.  Do we support one approach? Multiple?

File lists with hashes can be used to identify compromised endpoints for fi=
le indicators. Checks or configuration setting publication are probably the=
 best way to deal with some indicator types that relate to configuration it=
ems.

>   11. The Vulnerability Scanner executes the check on each of the potenti=
ally
> affected hosts which will return results effectively equivalent to "is
> vulnerable," "is not vulnerable," "not checked," or "error" [5].

What about "compromised" or "is not compromised"?

>   12. The Security Engineer reviews the report then generates three
> additional reports:

I thought we are striving for automation.  Why not automate the additional =
report generation?

>   13.
>     a. The first report provides summary information for the Information
> Security Manager and/or higher levels of organizational management as
> appropriate (i.e. Chief Information Security Officer)
>     b. The second report is a list of all potentially effected endpoints =
for which
> no definitive answer could be obtained by the Vulnerability Scanner (i.e.
> those endpoints for which neither an "is vulnerable" nor "is not vulnerab=
le"
> result is available)

s/effected/affected/

See above about alternate methods vs. using a vulnerability scanner. What a=
bout unreachable endpoints?

>     c. The third report is a list of all effected endpoints (i.e. those e=
ndpoints for
> which the checks resulted in "is vulnerable").

s/effected/affected/

>   14. The Security Engineer sends the first report to responsible Informa=
tion
> Security Manager(s) using relationships tracked by the Asset Management
> System
>=20
>   15. The Security Engineer sends the second report to responsible
> Vulnerability Engineer(s) using relationships tracked by the Asset
> Management System
>=20
>   16. The Security Engineer sends the third report to responsible System
> Administrator(s) using relationships tracked by the Asset Management
> System
>=20
>   17. The Security Engineer issues an alert to affected System Owners,
> Information Owners, and System Administrators using relationships tracked
> by the Asset Management System

Why can't 14-17 be automated alerts sent by the system implementing SACM sp=
ecifications?

> A Note On Alternative Paths, Preconditions, and Postconditions:
> There are likely to be many points of optimization and optional paths
> pertaining to this Use Case.  For example, there may be greater degrees o=
f
> interoperability between tools in a given organization, which would advan=
ce
> the state of automation in the "primary path" description herein provided=
.
>=20
>=20
> As with alternative paths, pre-/post-conditions can vary widely.  Conside=
r
> that this description likely represents an organization on the mature sid=
e of
> managing information security.  Most organizations are unlikely to have
> separate roles for Security Engineer and Vulnerability Engineer, for exam=
ple.
>=20
>=20
> --------------
> [1] The "[External]" notation is used to indicate that, while this step i=
s
> included in the primary path, it is out of the organization's locus of co=
ntrol
> (i.e. the step is provided for additional context in the path through the=
 use
> case rather than being placed in the pre-conditions).
>=20
>=20
> [2] An "accessible" content repository may be internal or external.  An
> internal content repository may be a replication of an external content
> repository.
>=20
>=20
> [3] Often, an indicator of compromise involves assessing the state of som=
e
> observable object on the endpoint.  For example, an indicator of
> compromise might be that a particular file path exists, a particular sett=
ing is
> configured in a specific manner, a set of settings are configured in a sp=
ecific
> manner, and/or specific log entries exist.
>=20
> [4] The Vulnerability Database may be combined with the content repositor=
y,
> but is being called out separately here to assure that the reader knows w=
hich
> type of data is being queried.
>=20
> [5] It is likely that additional result types will be required to convey =
different
> reasons a result may not be available.
>=20
> This message and attachments may contain confidential information.  If it
> appears that this message was sent to you by mistake, any retention,
> dissemination, distribution or copying of this message and attachments is
> strictly prohibited.  Please notify the sender immediately and permanentl=
y
> delete the message and any attachments.
> _______________________________________________
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Comments inline.=20

> -----Original Message-----
> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf Of
> Adam Montville
> Sent: Monday, July 15, 2013 4:57 PM
> To: sacm@ietf.org
> Subject: [sacm] Use Case Discussion: Suspicious Endpoint Behavior
>=20
> So, the Use Case discussion has been ongoing.  David Harrington submitted=
 a
> 05 draft (thank you!), so we have a lot to talk about.  Steve Hanna was g=
oing
> to craft some additional use cases, and I offered to help.  Here's what I=
've
> come up with after Steve asked for the assist.
>=20
> It's detailed, and there's another one coming after this one...  But, I t=
hink the
> detail might be useful.  When I think "use case" and that we want to get
> down to brass tacks, then this is the level of detail I think about.  At =
the very
> least, if it is found to be too detailed, then we have established some
> boundaries where we have examples of what may not be detailed enough
> (the pre 05 versions of the use case draft) and this (and following) exam=
ple
> for what may be too detailed.
>=20
> Nevertheless, I think it's probably easier to summarize from the detail t=
han it
> is to derive details from the summary...
>=20
>=20
>=20
> Use Case Name: Suspicious Endpoint Behavior
>=20
> Description:
> This Use Case describes the collaboration between specific participants i=
n an
> information security system specific to detecting a connection attempt to=
 a
> known-bad Internet host by a botnet zombie that has made its way onto an
> organization's Information Technology systems.  The primary human actor i=
s
> the Security Operations Center Analyst, and the primary software actor is=
 the
> configuration assessment tool.  Note, however, the dependencies on other
> tools, such as asset management, intrusion detection, and messaging.
>=20
>=20
> Actors:
>=20
>    * Security Operations Center (SOC) Analyst,
>    * Information Security Officer,
>    * System Owner
>    * Organizational Unit Leader
>=20
> Preconditions:
>=20
>=20
>    * Organizational Security Policy Exists
>    * Security Policy specifies appropriate asset management capabilities =
(i.e.
> categorization of endpoints)
>    * Security Policy specifies endpoint configuration baseline for asset
> categorization
>    * The Organization keeps a list of known-bad Internet hosts
>    * The Organization associates owners who are individuals with endpoint=
s
>    * The Organization associates organizational units with endpoints
>=20
> Postconditions:
>=20
>    * Endpoint configuration has been assessed [1]
>    * Results have been conveyed to scan requester
>=20
> Primary Path:
>=20
>   1. At 03:46 UTC an organization's Network Intrusion Detection System
> (NIDS) sees an IP packet with a destination IPv6 address existing on a bl=
acklist
> of known botnet command and control (C2) servers.
>=20
>   2. The NIDS sends an alert to the SOC Analyst.
>=20
>   3. The SOC Analyst uses the information captured in the alert (IP packe=
t and
> reason for the flag) to look up the endpoint in the organization's asset
> inventory system and discovers that the endpoint is a Windows Server 2008
> R2 Member Server playing the role of a File Server
>=20
>   4. The SOC Analyst also verifies that the IPv6 address cited by the NID=
S is, in
> fact, on the blacklist for known C2 servers.
>=20
>   5. At this point, the SOC Analyst switches over to the organization's
> configuration assessment tool
>=20
>   6. The SOC Analyst locates the offending endpoint in the configuration
> assessment tool's endpoint catalog [2]
>=20
>   7. The SOC Analyst then initiates an immediate and complete endpoint
> assessment to determine if the endpoint has experienced any configuration
> drift [3].

Wouldn't it be better if instead of requesting a batch assessment, that the=
 endpoint published configuration changes as they happened?  This may detec=
t compromise and may avoid the endpoint eventually lying about its configur=
ation when the scan occurs. In this case the SOC Analyst can query a CMDB c=
ontaining the current and historically related reported configurations for =
the endpoint skipping to step 11. Extending this, if the system had a mecha=
nism to determine what changes are authorized, unauthorized changes can be =
routed to the SOC Analyst as a potential security event starting step 1.

Performing scans in a periodic way is not continuous or very effective.  Fo=
r scanning to be effective here, the scanning rate needs to be twice as fre=
quent as the rate of change to have a chance of detecting a sophisticated a=
ttacker. Anything happening between samples/scans can compromise the endpoi=
nts ability to give truthful answers. This is a good case for event-driven =
data reporting where the changes is reported as soon as it happens. This ty=
pe of reporting has a chance of occurring before the attacker can compromis=
e the collector.

>   8. The configuration assessment tool:
>=20
>   9.
>     a. Performs a preliminary asset inventory scan on the offending endpo=
int,
> which results in a list of installed software [4][5]
>     b. Performs a comparison between the last known asset inventory and t=
he
> present asset inventory and notes any differences
>     c. Searches it's local content repository for appropriate configurati=
on
> baselines for the operating system of the offending endpoint and for each
> installed piece of software
>     d. Upon aggregating the set of applicable configuration baselines, th=
e
> configuration assessment tool then connects to and queries the
> organization's configuration content repository for newer baselines that =
may
> exist.
>     e. If a new baseline exists, then it is returned by the configuration=
 content
> repository.
>=20
>   10. The configuration management tool, having the set of updated
> baselines, initiates a scan against the offending host, which yields a re=
sult set.
>=20
>   11. The configuration management tool displays scan results to the SOC
> Analyst, which show that three new pieces of software have been installed
> on the offending endpoint where one piece of software is not on the
> authorized software list, and that several configuration items were out o=
f
> compliance with the organization's established baselines.
>=20
>   12. The SOC Analyst reviews the information for accuracy and to plan ne=
xt
> steps before sending the report to the responsible Information Security
> Officer, accountable System Owner, and the Organizational Unit Leader.
>=20
>=20
> A Note On Alternative Paths, Preconditions, and Postconditions:
> There are likely to be many points of optimization and optional paths.  F=
or
> example, a configuration assessment tool might provide a "quick glance" l=
ook
> at the most recent scan history for the offending endpoint.  A SOC Analys=
t
> might then elect not to run a new scan (i.e. the offending endpoint is kn=
own
> to be out of compliance, so why run a new scan?).  Another point might be
> that the offending endpoint is, at present, not authorized to be on the
> network, in which case it is very likely not to exist in the configuratio=
n
> assessment tool's endpoint catalog.

If the endpoint is joining the network for the first time, this may be the =
case.  In the future, historic info might be available.

> As with alternative paths, pre-/post-conditions can vary widely.  Conside=
r
> that this description likely represents an organization on the mature sid=
e of
> managing information security.  Many organizations do not have a Security
> Operations Center, nor do they necessarily monitor their network.  It may=
 be
> the case that a log management process has detected the blacklisted
> connection attempt  through audit trail monitoring.  Or, it may be the ca=
se
> that a shared indicator of compromise has been used to detect the offendi=
ng
> endpoint.
>=20
>=20
> -------------------
> [1] I am assuming at this point that "configuration assessment" has been
> defined and will be understood by the reader.  What I consider to be
> "assessment" is that the baseline has been obtained, send to the scanning
> implementation, endpoint configuration item values have been harvested,
> endpoint configuration item values have been compared against baseline,
> and results stored/forwarded as appropriate for the use case.
>=20
>=20
> [2] An "endpoint catalog" is intended to convey nothing more than the
> notion that configuration assessment tools are likely to have some method
> of listing, enumerating, or aggregating endpoints under configuration
> management.
>=20
>=20
> [3] It may not be necessary to specify what we mean by "complete" or the
> order in which scanning operations take place.  In this particular scenar=
io, I
> thought it might be useful to illustrate that "scan levels" exist on a
> continuum.
>=20
>=20
> [4] Remember that the configuration assessment tool has knowledge of the
> offending endpoint so running a preliminary inventory scan is reasonable =
at
> this point.
>=20
>=20
> [5] The mechanism of scan could be agent-based or remote, so details of
> how a scan happens are omitted here.  A more granular partition of the
> process is required for further details.
>=20
> This message and attachments may contain confidential information.  If it
> appears that this message was sent to you by mistake, any retention,
> dissemination, distribution or copying of this message and attachments is
> strictly prohibited.  Please notify the sender immediately and permanentl=
y
> delete the message and any attachments.
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From gunnar.engelbach@threatguard.com  Tue Jul 23 12:22:53 2013
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Cc: Adam Montville <Adam.Montville@cisecurity.org>, "sacm@ietf.org" <sacm@ietf.org>
Subject: Re: [sacm] Use Case Discussion: Suspicious Endpoint Behavior
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On 7/23/2013 2:28 PM, Waltermire, David A. wrote:
> Comments inline.
>

<snip>

>
> Wouldn't it be better if instead of requesting a batch assessment, that the endpoint published configuration changes as they happened?  This may detect compromise and may avoid the endpoint eventually lying about its configuration when the scan occurs.


Yes, it would be better, but I think that's a different use case.  It's 
the one I think we want to push for, but we have to first support the 
traditional periodic full and incremental assessments as a path to that.


>> In this case the SOC Analyst can query a CMDB containing the current and historically related reported configurations for the endpoint skipping to step 11. Extending this, if the system had a mechanism to determine what changes are authorized, unauthorized changes can be routed to the SOC Analyst as a potential security event starting step 1.

The data in the CMDB is only going to be as reliable as the collection 
method.  The endpoint can still lie about a change (or fail to report a 
change).  Further, the data in the CMDB is only as current as the last 
collection and might not represent the actual state of the endpoint.

I definitely think leveraging a CMDB when available is a net positive 
and should be supported, but it also creates other problems and should 
not be *required*.


>
> Performing scans in a periodic way is not continuous or very effective.  For scanning to be effective here, the scanning rate needs to be twice as frequent as the rate of change to have a chance of detecting a sophisticated attacker. Anything happening between samples/scans can compromise the endpoints ability to give truthful answers. This is a good case for event-driven data reporting where the changes is reported as soon as it happens. This type of reporting has a chance of occurring before the attacker can compromise the collector.

Just to be clear, Dave, the rule you refer to here works for things like 
determining the sample rate for audio, but does not apply here.

What we want to minimize is the window of opportunity to exploit an 
exposure, which is the amount of time between when a configuration item 
changed (or the announcement of a new vulnerability) and when it is 
detected and remediated.  The *average* time between when an item 
changed and when it is detected would be 1/2 the sampling rate.

If your "rate of change" is, for example, monthly, and you therefore set 
your periodic rescan for every two weeks, you still have an average time 
of exposure of a week and a worst case of two weeks.

Which only supports further your focus on bottom-up change detection 
from the endpoints.

From david.waltermire@nist.gov  Tue Jul 23 14:21:02 2013
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From: "Waltermire, David A." <david.waltermire@nist.gov>
To: Gunnar Engelbach <Gunnar.Engelbach@ThreatGuard.com>
Thread-Topic: [sacm] Use Case Discussion: Suspicious Endpoint Behavior
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Cc: Adam Montville <Adam.Montville@cisecurity.org>, "sacm@ietf.org" <sacm@ietf.org>
Subject: Re: [sacm] Use Case Discussion: Suspicious Endpoint Behavior
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Comments inline.

> -----Original Message-----
> From: Gunnar Engelbach [mailto:Gunnar.Engelbach@ThreatGuard.com]
> Sent: Tuesday, July 23, 2013 3:23 PM
> To: Waltermire, David A.
> Cc: Adam Montville; sacm@ietf.org
> Subject: Re: [sacm] Use Case Discussion: Suspicious Endpoint Behavior
>=20
> On 7/23/2013 2:28 PM, Waltermire, David A. wrote:
> > Comments inline.
> >
>=20
> <snip>
>=20
> >
> > Wouldn't it be better if instead of requesting a batch assessment, that=
 the
> endpoint published configuration changes as they happened?  This may
> detect compromise and may avoid the endpoint eventually lying about its
> configuration when the scan occurs.
>=20
>=20
> Yes, it would be better, but I think that's a different use case.  It's t=
he one I
> think we want to push for, but we have to first support the traditional
> periodic full and incremental assessments as a path to that.

I disagree with this being a different use case.  It is most certainly a di=
fferent technique for achieving/implementing the use case, but the use case=
 "detecting suspicious endpoint behavior" is the same as are the desired ou=
tcomes.

I am not advocating that we drop support for periodic scanning.  If fact, I=
 believe strongly that support for it is important for a variety of reasons=
. My concern is that we rely too much on periodic scanning to detect things=
 that it is not well suited to address. Event-driven detection of changes, =
both software and configuration, is critical for responding in a timely fas=
hion to security relevant events such as those that relate to unauthorized =
or malicious changes. We need to simultaneously support periodic and event-=
driven approaches in the standards we produce. For this to work right, we c=
an't bolt event-driven capabilities on after the fact.  This needs to be co=
nsidered as part of our architectural design and protocol adoption/design.=
=20

> >> In this case the SOC Analyst can query a CMDB containing the current a=
nd
> historically related reported configurations for the endpoint skipping to=
 step
> 11. Extending this, if the system had a mechanism to determine what
> changes are authorized, unauthorized changes can be routed to the SOC
> Analyst as a potential security event starting step 1.
>=20
> The data in the CMDB is only going to be as reliable as the collection me=
thod.
> The endpoint can still lie about a change (or fail to report a change).  =
Further,
> the data in the CMDB is only as current as the last collection and might =
not
> represent the actual state of the endpoint.

This is all true for both event-driven and periodic techniques. ;-) Many or=
ganizations are going to want a historic perspective regardless of the how =
the data is collected. This does bring up the need to capture the context o=
f collection, but that is a different discussion.

Event-driven collection is better for things that the attacker cannot silen=
ce, at least not initially until they achieve an appropriate level of privi=
lege. For example, they may be able to write to configurations using applic=
ation flaws, but they might not be able to prevent notifications of change =
events. Another example might be detecting signs of malware persistency (e.=
g., configuring it to load on boot) prior to a reboot.

> I definitely think leveraging a CMDB when available is a net positive and
> should be supported, but it also creates other problems and should not be
> *required*.

None of what we do will be required; it will all be voluntary. They key is =
to enable the endpoint to publish changes based on events. How that publish=
ed data gets processed and persisted is a downstream concern. The architect=
ure should allow for a variety of solutions that handle the info in various=
 ways providing organizations and vendors with some flexibility in deployed=
 architectures. What we want is a reasonable degree of interoperability wit=
h regards to the individual components.

> > Performing scans in a periodic way is not continuous or very effective.=
  For
> scanning to be effective here, the scanning rate needs to be twice as
> frequent as the rate of change to have a chance of detecting a sophistica=
ted
> attacker. Anything happening between samples/scans can compromise the
> endpoints ability to give truthful answers. This is a good case for event=
-driven
> data reporting where the changes is reported as soon as it happens. This
> type of reporting has a chance of occurring before the attacker can
> compromise the collector.
>=20
> Just to be clear, Dave, the rule you refer to here works for things like
> determining the sample rate for audio, but does not apply here.
>=20
> What we want to minimize is the window of opportunity to exploit an
> exposure, which is the amount of time between when a configuration item
> changed (or the announcement of a new vulnerability) and when it is
> detected and remediated.  The *average* time between when an item
> changed and when it is detected would be 1/2 the sampling rate.
>=20
> If your "rate of change" is, for example, monthly, and you therefore set =
your
> periodic rescan for every two weeks, you still have an average time of
> exposure of a week and a worst case of two weeks.

It doesn't apply if you define the window as the organizational change wind=
ow.  It does apply if you think about it as the attack window. Most attacks=
 will go unnoticed if the scanning occurs hourly.  In this scenario the att=
acker can get in, make changes, exfiltrate information, and then cleanup re=
storing things to the previous state within the hour period.

> Which only supports further your focus on bottom-up change detection from
> the endpoints.

Yes. I want to make sure that the standards we produce don't expose organiz=
ations unnecessarily if there is a more effective way. ;-) I am pushing to =
expand the scanning mindset to think about how we can approach this problem=
 space in a way that enables a variety of techniques. The legacy work that =
has been done in this space gets us a good way there.  We have a variety of=
 mechanisms that enable classes of configurations that are security relevan=
t to be identified and described.  These can be used to identify relevant c=
hange events. What is missing are the standards that describe how you imple=
ment protocols that enable endpoint data exchange that support both scannin=
g tasks and event driven publication. There are existing protocols such as =
NEA that can enable both techniques if we do the work to identify the speci=
fics of messaging. I would expect a similar approach would also enable incr=
emental scan results as well.

From gunnar.engelbach@threatguard.com  Tue Jul 23 15:49:04 2013
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Cc: Adam Montville <Adam.Montville@cisecurity.org>, "sacm@ietf.org" <sacm@ietf.org>
Subject: Re: [sacm] Use Case Discussion: Suspicious Endpoint Behavior
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Alrighty, some semantic quibbles, but I think we're both on the same page.

1) Endpoint-originated event-driven assessments are the necessary end 
state.  The solution needs to be designed for that up front.

2) CMDB's are good but not essential.

3) The standards describe a minimal set of data exchanges and 
operations, which can be organized into basic logical entities (such as 
Sensor or Evaluator), but in actual usage these can be mixed and matched 
to meet the actual needs.


Does anybody have an appreciable difference from that?




On 7/23/2013 5:20 PM, Waltermire, David A. wrote:
> Comments inline.
>
>> -----Original Message-----
>> From: Gunnar Engelbach [mailto:Gunnar.Engelbach@ThreatGuard.com]
>> Sent: Tuesday, July 23, 2013 3:23 PM
>> To: Waltermire, David A.
>> Cc: Adam Montville; sacm@ietf.org
>> Subject: Re: [sacm] Use Case Discussion: Suspicious Endpoint Behavior
>>
>> On 7/23/2013 2:28 PM, Waltermire, David A. wrote:
>>> Comments inline.
>>>
>>
>> <snip>
>>
>>>
>>> Wouldn't it be better if instead of requesting a batch assessment, that the
>> endpoint published configuration changes as they happened?  This may
>> detect compromise and may avoid the endpoint eventually lying about its
>> configuration when the scan occurs.
>>
>>
>> Yes, it would be better, but I think that's a different use case.  It's the one I
>> think we want to push for, but we have to first support the traditional
>> periodic full and incremental assessments as a path to that.
>
> I disagree with this being a different use case.  It is most certainly a different technique for achieving/implementing the use case, but the use case "detecting suspicious endpoint behavior" is the same as are the desired outcomes.
>
> I am not advocating that we drop support for periodic scanning.  If fact, I believe strongly that support for it is important for a variety of reasons. My concern is that we rely too much on periodic scanning to detect things that it is not well suited to address. Event-driven detection of changes, both software and configuration, is critical for responding in a timely fashion to security relevant events such as those that relate to unauthorized or malicious changes. We need to simultaneously support periodic and event-driven approaches in the standards we produce. For this to work right, we can't bolt event-driven capabilities on after the fact.  This needs to be considered as part of our architectural design and protocol adoption/design.
>
>>>> In this case the SOC Analyst can query a CMDB containing the current and
>> historically related reported configurations for the endpoint skipping to step
>> 11. Extending this, if the system had a mechanism to determine what
>> changes are authorized, unauthorized changes can be routed to the SOC
>> Analyst as a potential security event starting step 1.
>>
>> The data in the CMDB is only going to be as reliable as the collection method.
>> The endpoint can still lie about a change (or fail to report a change).  Further,
>> the data in the CMDB is only as current as the last collection and might not
>> represent the actual state of the endpoint.
>
> This is all true for both event-driven and periodic techniques. ;-) Many organizations are going to want a historic perspective regardless of the how the data is collected. This does bring up the need to capture the context of collection, but that is a different discussion.
>
> Event-driven collection is better for things that the attacker cannot silence, at least not initially until they achieve an appropriate level of privilege. For example, they may be able to write to configurations using application flaws, but they might not be able to prevent notifications of change events. Another example might be detecting signs of malware persistency (e.g., configuring it to load on boot) prior to a reboot.
>
>> I definitely think leveraging a CMDB when available is a net positive and
>> should be supported, but it also creates other problems and should not be
>> *required*.
>
> None of what we do will be required; it will all be voluntary. They key is to enable the endpoint to publish changes based on events. How that published data gets processed and persisted is a downstream concern. The architecture should allow for a variety of solutions that handle the info in various ways providing organizations and vendors with some flexibility in deployed architectures. What we want is a reasonable degree of interoperability with regards to the individual components.
>
>>> Performing scans in a periodic way is not continuous or very effective.  For
>> scanning to be effective here, the scanning rate needs to be twice as
>> frequent as the rate of change to have a chance of detecting a sophisticated
>> attacker. Anything happening between samples/scans can compromise the
>> endpoints ability to give truthful answers. This is a good case for event-driven
>> data reporting where the changes is reported as soon as it happens. This
>> type of reporting has a chance of occurring before the attacker can
>> compromise the collector.
>>
>> Just to be clear, Dave, the rule you refer to here works for things like
>> determining the sample rate for audio, but does not apply here.
>>
>> What we want to minimize is the window of opportunity to exploit an
>> exposure, which is the amount of time between when a configuration item
>> changed (or the announcement of a new vulnerability) and when it is
>> detected and remediated.  The *average* time between when an item
>> changed and when it is detected would be 1/2 the sampling rate.
>>
>> If your "rate of change" is, for example, monthly, and you therefore set your
>> periodic rescan for every two weeks, you still have an average time of
>> exposure of a week and a worst case of two weeks.
>
> It doesn't apply if you define the window as the organizational change window.  It does apply if you think about it as the attack window. Most attacks will go unnoticed if the scanning occurs hourly.  In this scenario the attacker can get in, make changes, exfiltrate information, and then cleanup restoring things to the previous state within the hour period.
>
>> Which only supports further your focus on bottom-up change detection from
>> the endpoints.
>
> Yes. I want to make sure that the standards we produce don't expose organizations unnecessarily if there is a more effective way. ;-) I am pushing to expand the scanning mindset to think about how we can approach this problem space in a way that enables a variety of techniques. The legacy work that has been done in this space gets us a good way there.  We have a variety of mechanisms that enable classes of configurations that are security relevant to be identified and described.  These can be used to identify relevant change events. What is missing are the standards that describe how you implement protocols that enable endpoint data exchange that support both scanning tasks and event driven publication. There are existing protocols such as NEA that can enable both techniques if we do the work to identify the specifics of messaging. I would expect a similar approach would also enable incremental scan results as well.
>

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Hi,

What would you think about trying to define the Use Cases around the =
SANS TOP20 Critical Security Controls?
http://www.sans.org/critical-security-controls/

It could help to focus and prioritize.


By the way, I found this an interesting reading
=
https://securosis.com/blog/continuous-security-monitoring-the-attack-use-c=
ase

Best regards
/JA=

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From: Rainer Enders <Rainer.Enders@ncp-e.com>
To: Gunnar Engelbach <Gunnar.Engelbach@ThreatGuard.com>, "Waltermire, David A." <david.waltermire@nist.gov>
Date: Wed, 24 Jul 2013 18:46:18 +0200
Thread-Topic: [sacm] Use Case Discussion: Suspicious Endpoint Behavior
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Subject: Re: [sacm] Use Case Discussion: Suspicious Endpoint Behavior
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IMHO it is important to have a self-contained endpoint approach in which
the endpoint is capable of maintaining its own security. A part of this is
that the endpoint should be able to collect and present security posture
related information and ensure the integrity of such information. A
remotely performed assessment/scanning process has significant issues such
as availability of the endpoint. If I can assert that a certain endpoint
is potentially vulnerable I can act on this information quickly once the
endpoint is trying to get on the network again without any extensive
scanning efforts during network admission. Off course one should argue
that this kind of scanning/assessment is necessary to t0 when the
endpoint joins the network for the very first time. However I see this as
complementary to the endpoint self-contained approach. Also the
methodology of the scan/assessment must be considered. How do you ensure
the reliability and integrity of the information that is collected? NEA
has been mentioned before. However NEA does not deal with detection and/or
prevention of lying endpoints. Likewise it does not perform detection of
malware that could report false endpoint information. So in that sense I
disagree with point 2 that CMDBs are non-essential. Additionally in the
spirit of minimal interactions between endpoints and network it appears
that the endpoint itself knows best when and how things are changing. It
is almost like you say the doctor should tell the patient when to visit
the doctor office versus the patient seeing the doctor when the patient
feels sick ;)

Regards,
Rainer



On 7/23/13 3:49 PM, "Gunnar Engelbach" <Gunnar.Engelbach@ThreatGuard.com>
wrote:

>
>Alrighty, some semantic quibbles, but I think we're both on the same page.
>
>1) Endpoint-originated event-driven assessments are the necessary end
>state.  The solution needs to be designed for that up front.
>
>2) CMDB's are good but not essential.
>
>3) The standards describe a minimal set of data exchanges and
>operations, which can be organized into basic logical entities (such as
>Sensor or Evaluator), but in actual usage these can be mixed and matched
>to meet the actual needs.
>
>
>Does anybody have an appreciable difference from that?
>
>
>
>
>On 7/23/2013 5:20 PM, Waltermire, David A. wrote:
>> Comments inline.
>>
>>> -----Original Message-----
>>> From: Gunnar Engelbach [mailto:Gunnar.Engelbach@ThreatGuard.com]
>>> Sent: Tuesday, July 23, 2013 3:23 PM
>>> To: Waltermire, David A.
>>> Cc: Adam Montville; sacm@ietf.org
>>> Subject: Re: [sacm] Use Case Discussion: Suspicious Endpoint Behavior
>>>
>>> On 7/23/2013 2:28 PM, Waltermire, David A. wrote:
>>>> Comments inline.
>>>>
>>>
>>> <snip>
>>>
>>>>
>>>> Wouldn't it be better if instead of requesting a batch assessment,
>>>>that the
>>> endpoint published configuration changes as they happened?  This may
>>> detect compromise and may avoid the endpoint eventually lying about its
>>> configuration when the scan occurs.
>>>
>>>
>>> Yes, it would be better, but I think that's a different use case.
>>>It's the one I
>>> think we want to push for, but we have to first support the traditional
>>> periodic full and incremental assessments as a path to that.
>>
>> I disagree with this being a different use case.  It is most certainly
>>a different technique for achieving/implementing the use case, but the
>>use case "detecting suspicious endpoint behavior" is the same as are the
>>desired outcomes.
>>
>> I am not advocating that we drop support for periodic scanning.  If
>>fact, I believe strongly that support for it is important for a variety
>>of reasons. My concern is that we rely too much on periodic scanning to
>>detect things that it is not well suited to address. Event-driven
>>detection of changes, both software and configuration, is critical for
>>responding in a timely fashion to security relevant events such as those
>>that relate to unauthorized or malicious changes. We need to
>>simultaneously support periodic and event-driven approaches in the
>>standards we produce. For this to work right, we can't bolt event-driven
>>capabilities on after the fact.  This needs to be considered as part of
>>our architectural design and protocol adoption/design.
>>
>>>>> In this case the SOC Analyst can query a CMDB containing the current
>>>>>and
>>> historically related reported configurations for the endpoint skipping
>>>to step
>>> 11. Extending this, if the system had a mechanism to determine what
>>> changes are authorized, unauthorized changes can be routed to the SOC
>>> Analyst as a potential security event starting step 1.
>>>
>>> The data in the CMDB is only going to be as reliable as the collection
>>>method.
>>> The endpoint can still lie about a change (or fail to report a
>>>change).  Further,
>>> the data in the CMDB is only as current as the last collection and
>>>might not
>>> represent the actual state of the endpoint.
>>
>> This is all true for both event-driven and periodic techniques. ;-)
>>Many organizations are going to want a historic perspective regardless
>>of the how the data is collected. This does bring up the need to capture
>>the context of collection, but that is a different discussion.
>>
>> Event-driven collection is better for things that the attacker cannot
>>silence, at least not initially until they achieve an appropriate level
>>of privilege. For example, they may be able to write to configurations
>>using application flaws, but they might not be able to prevent
>>notifications of change events. Another example might be detecting signs
>>of malware persistency (e.g., configuring it to load on boot) prior to a
>>reboot.
>>
>>> I definitely think leveraging a CMDB when available is a net positive
>>>and
>>> should be supported, but it also creates other problems and should not
>>>be
>>> *required*.
>>
>> None of what we do will be required; it will all be voluntary. They key
>>is to enable the endpoint to publish changes based on events. How that
>>published data gets processed and persisted is a downstream concern. The
>>architecture should allow for a variety of solutions that handle the
>>info in various ways providing organizations and vendors with some
>>flexibility in deployed architectures. What we want is a reasonable
>>degree of interoperability with regards to the individual components.
>>
>>>> Performing scans in a periodic way is not continuous or very
>>>>effective.  For
>>> scanning to be effective here, the scanning rate needs to be twice as
>>> frequent as the rate of change to have a chance of detecting a
>>>sophisticated
>>> attacker. Anything happening between samples/scans can compromise the
>>> endpoints ability to give truthful answers. This is a good case for
>>>event-driven
>>> data reporting where the changes is reported as soon as it happens.
>>>This
>>> type of reporting has a chance of occurring before the attacker can
>>> compromise the collector.
>>>
>>> Just to be clear, Dave, the rule you refer to here works for things
>>>like
>>> determining the sample rate for audio, but does not apply here.
>>>
>>> What we want to minimize is the window of opportunity to exploit an
>>> exposure, which is the amount of time between when a configuration item
>>> changed (or the announcement of a new vulnerability) and when it is
>>> detected and remediated.  The *average* time between when an item
>>> changed and when it is detected would be 1/2 the sampling rate.
>>>
>>> If your "rate of change" is, for example, monthly, and you therefore
>>>set your
>>> periodic rescan for every two weeks, you still have an average time of
>>> exposure of a week and a worst case of two weeks.
>>
>> It doesn't apply if you define the window as the organizational change
>>window.  It does apply if you think about it as the attack window. Most
>>attacks will go unnoticed if the scanning occurs hourly.  In this
>>scenario the attacker can get in, make changes, exfiltrate information,
>>and then cleanup restoring things to the previous state within the hour
>>period.
>>
>>> Which only supports further your focus on bottom-up change detection
>>>from
>>> the endpoints.
>>
>> Yes. I want to make sure that the standards we produce don't expose
>>organizations unnecessarily if there is a more effective way. ;-) I am
>>pushing to expand the scanning mindset to think about how we can
>>approach this problem space in a way that enables a variety of
>>techniques. The legacy work that has been done in this space gets us a
>>good way there.  We have a variety of mechanisms that enable classes of
>>configurations that are security relevant to be identified and
>>described.  These can be used to identify relevant change events. What
>>is missing are the standards that describe how you implement protocols
>>that enable endpoint data exchange that support both scanning tasks and
>>event driven publication. There are existing protocols such as NEA that
>>can enable both techniques if we do the work to identify the specifics
>>of messaging. I would expect a similar approach would also enable
>>incremental scan results as well.
>>
>_______________________________________________
>sacm mailing list
>sacm@ietf.org
>https://www.ietf.org/mailman/listinfo/sacm


From gunnar.engelbach@threatguard.com  Wed Jul 24 10:30:51 2013
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Cc: Adam Montville <Adam.Montville@cisecurity.org>, "Waltermire, David A." <david.waltermire@nist.gov>, "sacm@ietf.org" <sacm@ietf.org>
Subject: Re: [sacm] Use Case Discussion: Suspicious Endpoint Behavior
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A) Self-contained endpoints
Absolutely.  The third diagram I sent has just such a thing, which can 
both self-evaluate and participate in the enterprise system.  This isn't 
just a nifty application of the proposed standards, but a necessity that 
we have encountered at several customer engagements.


B) The essential CMDB
Whether it's for direct consumption or intermediate consumption via a 
CMDB there is always some sort of collection process needed to reap 
endpoint artifacts.  Use of a CMDB does not eliminate the lying endpoint 
problem.  And even if endpoint isn't lying, perhaps the CMDB is, so it's 
an additional link in that trust chain.  There will also be some degree 
of lag between a change made on the endpoint and when that is reflected 
in the CMDB, so you just can't beat being able to directly query an 
endpoint.

OTOH, a CMDB also has many benefits.  I want to see them supported, I 
just don't think they should be required.

Also, I am coming at this from the SCAP world, where it's not just a 
matter of collecting endpoint artifacts, but doing that collection in a 
manner that is verifiably correct (which is where OVAL comes in -- 
codifying vendor recommendations and/or best practices), and this is a 
very important factor.

So there's two trust factors to deal with:  is the endpoint lying, and 
was the artifact properly collected.

There's nothing about the current architecture that says the only way to 
collect artifacts is directly from each endpoint, but I do think we need 
to include the full provenance as metadata to accompany artifacts.




On 7/24/2013 12:46 PM, Rainer Enders wrote:
> IMHO it is important to have a self-contained endpoint approach in which
> the endpoint is capable of maintaining its own security. A part of this is
> that the endpoint should be able to collect and present security posture
> related information and ensure the integrity of such information. A
> remotely performed assessment/scanning process has significant issues such
> as availability of the endpoint. If I can assert that a certain endpoint
> is potentially vulnerable I can act on this information quickly once the
> endpoint is trying to get on the network again without any extensive
> scanning efforts during network admission. Off course one should argue
> that this kind of scanning/assessment is necessary to t0 when the
> endpoint joins the network for the very first time. However I see this as
> complementary to the endpoint self-contained approach. Also the
> methodology of the scan/assessment must be considered. How do you ensure
> the reliability and integrity of the information that is collected? NEA
> has been mentioned before. However NEA does not deal with detection and/or
> prevention of lying endpoints. Likewise it does not perform detection of
> malware that could report false endpoint information. So in that sense I
> disagree with point 2 that CMDBs are non-essential. Additionally in the
> spirit of minimal interactions between endpoints and network it appears
> that the endpoint itself knows best when and how things are changing. It
> is almost like you say the doctor should tell the patient when to visit
> the doctor office versus the patient seeing the doctor when the patient
> feels sick ;)
>
> Regards,
> Rainer
>
>
>
> On 7/23/13 3:49 PM, "Gunnar Engelbach" <Gunnar.Engelbach@ThreatGuard.com>
> wrote:
>
>>
>> Alrighty, some semantic quibbles, but I think we're both on the same page.
>>
>> 1) Endpoint-originated event-driven assessments are the necessary end
>> state.  The solution needs to be designed for that up front.
>>
>> 2) CMDB's are good but not essential.
>>
>> 3) The standards describe a minimal set of data exchanges and
>> operations, which can be organized into basic logical entities (such as
>> Sensor or Evaluator), but in actual usage these can be mixed and matched
>> to meet the actual needs.
>>
>>
>> Does anybody have an appreciable difference from that?
>>
>>
>>
>>
>> On 7/23/2013 5:20 PM, Waltermire, David A. wrote:
>>> Comments inline.
>>>
>>>> -----Original Message-----
>>>> From: Gunnar Engelbach [mailto:Gunnar.Engelbach@ThreatGuard.com]
>>>> Sent: Tuesday, July 23, 2013 3:23 PM
>>>> To: Waltermire, David A.
>>>> Cc: Adam Montville; sacm@ietf.org
>>>> Subject: Re: [sacm] Use Case Discussion: Suspicious Endpoint Behavior
>>>>
>>>> On 7/23/2013 2:28 PM, Waltermire, David A. wrote:
>>>>> Comments inline.
>>>>>
>>>>
>>>> <snip>
>>>>
>>>>>
>>>>> Wouldn't it be better if instead of requesting a batch assessment,
>>>>> that the
>>>> endpoint published configuration changes as they happened?  This may
>>>> detect compromise and may avoid the endpoint eventually lying about its
>>>> configuration when the scan occurs.
>>>>
>>>>
>>>> Yes, it would be better, but I think that's a different use case.
>>>> It's the one I
>>>> think we want to push for, but we have to first support the traditional
>>>> periodic full and incremental assessments as a path to that.
>>>
>>> I disagree with this being a different use case.  It is most certainly
>>> a different technique for achieving/implementing the use case, but the
>>> use case "detecting suspicious endpoint behavior" is the same as are the
>>> desired outcomes.
>>>
>>> I am not advocating that we drop support for periodic scanning.  If
>>> fact, I believe strongly that support for it is important for a variety
>>> of reasons. My concern is that we rely too much on periodic scanning to
>>> detect things that it is not well suited to address. Event-driven
>>> detection of changes, both software and configuration, is critical for
>>> responding in a timely fashion to security relevant events such as those
>>> that relate to unauthorized or malicious changes. We need to
>>> simultaneously support periodic and event-driven approaches in the
>>> standards we produce. For this to work right, we can't bolt event-driven
>>> capabilities on after the fact.  This needs to be considered as part of
>>> our architectural design and protocol adoption/design.
>>>
>>>>>> In this case the SOC Analyst can query a CMDB containing the current
>>>>>> and
>>>> historically related reported configurations for the endpoint skipping
>>>> to step
>>>> 11. Extending this, if the system had a mechanism to determine what
>>>> changes are authorized, unauthorized changes can be routed to the SOC
>>>> Analyst as a potential security event starting step 1.
>>>>
>>>> The data in the CMDB is only going to be as reliable as the collection
>>>> method.
>>>> The endpoint can still lie about a change (or fail to report a
>>>> change).  Further,
>>>> the data in the CMDB is only as current as the last collection and
>>>> might not
>>>> represent the actual state of the endpoint.
>>>
>>> This is all true for both event-driven and periodic techniques. ;-)
>>> Many organizations are going to want a historic perspective regardless
>>> of the how the data is collected. This does bring up the need to capture
>>> the context of collection, but that is a different discussion.
>>>
>>> Event-driven collection is better for things that the attacker cannot
>>> silence, at least not initially until they achieve an appropriate level
>>> of privilege. For example, they may be able to write to configurations
>>> using application flaws, but they might not be able to prevent
>>> notifications of change events. Another example might be detecting signs
>>> of malware persistency (e.g., configuring it to load on boot) prior to a
>>> reboot.
>>>
>>>> I definitely think leveraging a CMDB when available is a net positive
>>>> and
>>>> should be supported, but it also creates other problems and should not
>>>> be
>>>> *required*.
>>>
>>> None of what we do will be required; it will all be voluntary. They key
>>> is to enable the endpoint to publish changes based on events. How that
>>> published data gets processed and persisted is a downstream concern. The
>>> architecture should allow for a variety of solutions that handle the
>>> info in various ways providing organizations and vendors with some
>>> flexibility in deployed architectures. What we want is a reasonable
>>> degree of interoperability with regards to the individual components.
>>>
>>>>> Performing scans in a periodic way is not continuous or very
>>>>> effective.  For
>>>> scanning to be effective here, the scanning rate needs to be twice as
>>>> frequent as the rate of change to have a chance of detecting a
>>>> sophisticated
>>>> attacker. Anything happening between samples/scans can compromise the
>>>> endpoints ability to give truthful answers. This is a good case for
>>>> event-driven
>>>> data reporting where the changes is reported as soon as it happens.
>>>> This
>>>> type of reporting has a chance of occurring before the attacker can
>>>> compromise the collector.
>>>>
>>>> Just to be clear, Dave, the rule you refer to here works for things
>>>> like
>>>> determining the sample rate for audio, but does not apply here.
>>>>
>>>> What we want to minimize is the window of opportunity to exploit an
>>>> exposure, which is the amount of time between when a configuration item
>>>> changed (or the announcement of a new vulnerability) and when it is
>>>> detected and remediated.  The *average* time between when an item
>>>> changed and when it is detected would be 1/2 the sampling rate.
>>>>
>>>> If your "rate of change" is, for example, monthly, and you therefore
>>>> set your
>>>> periodic rescan for every two weeks, you still have an average time of
>>>> exposure of a week and a worst case of two weeks.
>>>
>>> It doesn't apply if you define the window as the organizational change
>>> window.  It does apply if you think about it as the attack window. Most
>>> attacks will go unnoticed if the scanning occurs hourly.  In this
>>> scenario the attacker can get in, make changes, exfiltrate information,
>>> and then cleanup restoring things to the previous state within the hour
>>> period.
>>>
>>>> Which only supports further your focus on bottom-up change detection
>>>> from
>>>> the endpoints.
>>>
>>> Yes. I want to make sure that the standards we produce don't expose
>>> organizations unnecessarily if there is a more effective way. ;-) I am
>>> pushing to expand the scanning mindset to think about how we can
>>> approach this problem space in a way that enables a variety of
>>> techniques. The legacy work that has been done in this space gets us a
>>> good way there.  We have a variety of mechanisms that enable classes of
>>> configurations that are security relevant to be identified and
>>> described.  These can be used to identify relevant change events. What
>>> is missing are the standards that describe how you implement protocols
>>> that enable endpoint data exchange that support both scanning tasks and
>>> event driven publication. There are existing protocols such as NEA that
>>> can enable both techniques if we do the work to identify the specifics
>>> of messaging. I would expect a similar approach would also enable
>>> incremental scan results as well.
>>>
>> _______________________________________________
>> sacm mailing list
>> sacm@ietf.org
>> https://www.ietf.org/mailman/listinfo/sacm
>

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From: Rainer Enders <Rainer.Enders@ncp-e.com>
To: Gunnar Engelbach <Gunnar.Engelbach@ThreatGuard.com>
Date: Wed, 24 Jul 2013 20:10:05 +0200
Thread-Topic: [sacm] Use Case Discussion: Suspicious Endpoint Behavior
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Cc: Adam Montville <Adam.Montville@cisecurity.org>, "Waltermire, David A." <david.waltermire@nist.gov>, "sacm@ietf.org" <sacm@ietf.org>
Subject: Re: [sacm] Use Case Discussion: Suspicious Endpoint Behavior
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This is an important discussion and I thought - in my mind at least - that
Trusted Computing plays a relevant role here but let me explain in more
detail what I am referring to. You are making good and relevant points see
some more comments below in context.


On 7/24/13 10:30 AM, "Gunnar Engelbach" <Gunnar.Engelbach@ThreatGuard.com>
wrote:

>
>A) Self-contained endpoints
>Absolutely.  The third diagram I sent has just such a thing, which can
>both self-evaluate and participate in the enterprise system.  This isn't
>just a nifty application of the proposed standards, but a necessity that
>we have encountered at several customer engagements.

Good.
>
>
>B) The essential CMDB
>Whether it's for direct consumption or intermediate consumption via a
>CMDB there is always some sort of collection process needed to reap
>endpoint artifacts.  Use of a CMDB does not eliminate the lying endpoint

That is exactly the point. I did not imply CMDB is in any way linked to
lying endpoints. What I am thinking is that emphasis must be put on
securing the endpoint - and I am particularly thinking about mobile
endpoints in that context. (mobile) Endpoints must be put into a position
to protect themselves. This entails that the endpoint should be able to
monitor and report on its identity and state in a trusted way. The
elements of Root of Trust come into play here and my vision is that the
endpoint would ideally monitor and measure its own integrity from birth to
death. When in a network-linked relationship the endpoint should be able
to report on itself and maybe even seek remediation assistance on its own.
So very much endpoint driven vs. network driven.

>
>problem.  And even if endpoint isn't lying, perhaps the CMDB is, so it's

I agree with this statement. However I think the infrastructure components
can be protected much easier as it will reside in a protected/controlled
environment and hopefully the operating instance where this function is
residing is mostly stable and controlled. As I pointed out above my
foremost concern is around mobile endpoints vs. infrastructure endpoints.


>
>an additional link in that trust chain.  There will also be some degree
>of lag between a change made on the endpoint and when that is reflected
>in the CMDB, so you just can't beat being able to directly query an
>endpoint.

This is exactly my point and goes back to David's comment about scanning
interval. There is just no right or wrong scanning interval and even with
"event-triggered" on-demand scanning you would need to establish event
categories/classification and when and how what kind of event would
trigger a query action. So I think it is much simpler to let the endpoint
establish what is changing and report on that event. With that strategy
you could hopefully have some assurance that your configuration database
reflects actual endpoint state. This does not mean you could use on-demand
query as a complementary action.

>
>OTOH, a CMDB also has many benefits.  I want to see them supported, I
>just don't think they should be required.
>
>Also, I am coming at this from the SCAP world, where it's not just a
>matter of collecting endpoint artifacts, but doing that collection in a
>manner that is verifiably correct (which is where OVAL comes in --
>codifying vendor recommendations and/or best practices), and this is a
>very important factor.

I must admit that I am not an SCAP expert however I think what you state
sounds interesting to include some sort of baseline parameters - if I
understand this correctly. I agree this can be an important factor.

>
>So there's two trust factors to deal with:  is the endpoint lying, and
>was the artifact properly collected.

I think this is an important problem to solve! Either way you do it if
endpoint identity and state cannot be asserted all bets are off no matter
what you do.

>
>There's nothing about the current architecture that says the only way to
>collect artifacts is directly from each endpoint, but I do think we need
>to include the full provenance as metadata to accompany artifacts.
>
>
>
>
>On 7/24/2013 12:46 PM, Rainer Enders wrote:
>> IMHO it is important to have a self-contained endpoint approach in which
>> the endpoint is capable of maintaining its own security. A part of this
>>is
>> that the endpoint should be able to collect and present security posture
>> related information and ensure the integrity of such information. A
>> remotely performed assessment/scanning process has significant issues
>>such
>> as availability of the endpoint. If I can assert that a certain endpoint
>> is potentially vulnerable I can act on this information quickly once the
>> endpoint is trying to get on the network again without any extensive
>> scanning efforts during network admission. Off course one should argue
>> that this kind of scanning/assessment is necessary to t0 when the
>> endpoint joins the network for the very first time. However I see this
>>as
>> complementary to the endpoint self-contained approach. Also the
>> methodology of the scan/assessment must be considered. How do you ensure
>> the reliability and integrity of the information that is collected? NEA
>> has been mentioned before. However NEA does not deal with detection
>>and/or
>> prevention of lying endpoints. Likewise it does not perform detection of
>> malware that could report false endpoint information. So in that sense I
>> disagree with point 2 that CMDBs are non-essential. Additionally in the
>> spirit of minimal interactions between endpoints and network it appears
>> that the endpoint itself knows best when and how things are changing. It
>> is almost like you say the doctor should tell the patient when to visit
>> the doctor office versus the patient seeing the doctor when the patient
>> feels sick ;)
>>
>> Regards,
>> Rainer
>>
>>
>>
>> On 7/23/13 3:49 PM, "Gunnar Engelbach"
>><Gunnar.Engelbach@ThreatGuard.com>
>> wrote:
>>
>>>
>>> Alrighty, some semantic quibbles, but I think we're both on the same
>>>page.
>>>
>>> 1) Endpoint-originated event-driven assessments are the necessary end
>>> state.  The solution needs to be designed for that up front.
>>>
>>> 2) CMDB's are good but not essential.
>>>
>>> 3) The standards describe a minimal set of data exchanges and
>>> operations, which can be organized into basic logical entities (such as
>>> Sensor or Evaluator), but in actual usage these can be mixed and
>>>matched
>>> to meet the actual needs.
>>>
>>>
>>> Does anybody have an appreciable difference from that?
>>>
>>>
>>>
>>>
>>> On 7/23/2013 5:20 PM, Waltermire, David A. wrote:
>>>> Comments inline.
>>>>
>>>>> -----Original Message-----
>>>>> From: Gunnar Engelbach [mailto:Gunnar.Engelbach@ThreatGuard.com]
>>>>> Sent: Tuesday, July 23, 2013 3:23 PM
>>>>> To: Waltermire, David A.
>>>>> Cc: Adam Montville; sacm@ietf.org
>>>>> Subject: Re: [sacm] Use Case Discussion: Suspicious Endpoint Behavior
>>>>>
>>>>> On 7/23/2013 2:28 PM, Waltermire, David A. wrote:
>>>>>> Comments inline.
>>>>>>
>>>>>
>>>>> <snip>
>>>>>
>>>>>>
>>>>>> Wouldn't it be better if instead of requesting a batch assessment,
>>>>>> that the
>>>>> endpoint published configuration changes as they happened?  This may
>>>>> detect compromise and may avoid the endpoint eventually lying about
>>>>>its
>>>>> configuration when the scan occurs.
>>>>>
>>>>>
>>>>> Yes, it would be better, but I think that's a different use case.
>>>>> It's the one I
>>>>> think we want to push for, but we have to first support the
>>>>>traditional
>>>>> periodic full and incremental assessments as a path to that.
>>>>
>>>> I disagree with this being a different use case.  It is most certainly
>>>> a different technique for achieving/implementing the use case, but the
>>>> use case "detecting suspicious endpoint behavior" is the same as are
>>>>the
>>>> desired outcomes.
>>>>
>>>> I am not advocating that we drop support for periodic scanning.  If
>>>> fact, I believe strongly that support for it is important for a
>>>>variety
>>>> of reasons. My concern is that we rely too much on periodic scanning
>>>>to
>>>> detect things that it is not well suited to address. Event-driven
>>>> detection of changes, both software and configuration, is critical for
>>>> responding in a timely fashion to security relevant events such as
>>>>those
>>>> that relate to unauthorized or malicious changes. We need to
>>>> simultaneously support periodic and event-driven approaches in the
>>>> standards we produce. For this to work right, we can't bolt
>>>>event-driven
>>>> capabilities on after the fact.  This needs to be considered as part
>>>>of
>>>> our architectural design and protocol adoption/design.
>>>>
>>>>>>> In this case the SOC Analyst can query a CMDB containing the
>>>>>>>current
>>>>>>> and
>>>>> historically related reported configurations for the endpoint
>>>>>skipping
>>>>> to step
>>>>> 11. Extending this, if the system had a mechanism to determine what
>>>>> changes are authorized, unauthorized changes can be routed to the SOC
>>>>> Analyst as a potential security event starting step 1.
>>>>>
>>>>> The data in the CMDB is only going to be as reliable as the
>>>>>collection
>>>>> method.
>>>>> The endpoint can still lie about a change (or fail to report a
>>>>> change).  Further,
>>>>> the data in the CMDB is only as current as the last collection and
>>>>> might not
>>>>> represent the actual state of the endpoint.
>>>>
>>>> This is all true for both event-driven and periodic techniques. ;-)
>>>> Many organizations are going to want a historic perspective regardless
>>>> of the how the data is collected. This does bring up the need to
>>>>capture
>>>> the context of collection, but that is a different discussion.
>>>>
>>>> Event-driven collection is better for things that the attacker cannot
>>>> silence, at least not initially until they achieve an appropriate
>>>>level
>>>> of privilege. For example, they may be able to write to configurations
>>>> using application flaws, but they might not be able to prevent
>>>> notifications of change events. Another example might be detecting
>>>>signs
>>>> of malware persistency (e.g., configuring it to load on boot) prior
>>>>to a
>>>> reboot.
>>>>
>>>>> I definitely think leveraging a CMDB when available is a net positive
>>>>> and
>>>>> should be supported, but it also creates other problems and should
>>>>>not
>>>>> be
>>>>> *required*.
>>>>
>>>> None of what we do will be required; it will all be voluntary. They
>>>>key
>>>> is to enable the endpoint to publish changes based on events. How that
>>>> published data gets processed and persisted is a downstream concern.
>>>>The
>>>> architecture should allow for a variety of solutions that handle the
>>>> info in various ways providing organizations and vendors with some
>>>> flexibility in deployed architectures. What we want is a reasonable
>>>> degree of interoperability with regards to the individual components.
>>>>
>>>>>> Performing scans in a periodic way is not continuous or very
>>>>>> effective.  For
>>>>> scanning to be effective here, the scanning rate needs to be twice as
>>>>> frequent as the rate of change to have a chance of detecting a
>>>>> sophisticated
>>>>> attacker. Anything happening between samples/scans can compromise the
>>>>> endpoints ability to give truthful answers. This is a good case for
>>>>> event-driven
>>>>> data reporting where the changes is reported as soon as it happens.
>>>>> This
>>>>> type of reporting has a chance of occurring before the attacker can
>>>>> compromise the collector.
>>>>>
>>>>> Just to be clear, Dave, the rule you refer to here works for things
>>>>> like
>>>>> determining the sample rate for audio, but does not apply here.
>>>>>
>>>>> What we want to minimize is the window of opportunity to exploit an
>>>>> exposure, which is the amount of time between when a configuration
>>>>>item
>>>>> changed (or the announcement of a new vulnerability) and when it is
>>>>> detected and remediated.  The *average* time between when an item
>>>>> changed and when it is detected would be 1/2 the sampling rate.
>>>>>
>>>>> If your "rate of change" is, for example, monthly, and you therefore
>>>>> set your
>>>>> periodic rescan for every two weeks, you still have an average time
>>>>>of
>>>>> exposure of a week and a worst case of two weeks.
>>>>
>>>> It doesn't apply if you define the window as the organizational change
>>>> window.  It does apply if you think about it as the attack window.
>>>>Most
>>>> attacks will go unnoticed if the scanning occurs hourly.  In this
>>>> scenario the attacker can get in, make changes, exfiltrate
>>>>information,
>>>> and then cleanup restoring things to the previous state within the
>>>>hour
>>>> period.
>>>>
>>>>> Which only supports further your focus on bottom-up change detection
>>>>> from
>>>>> the endpoints.
>>>>
>>>> Yes. I want to make sure that the standards we produce don't expose
>>>> organizations unnecessarily if there is a more effective way. ;-) I am
>>>> pushing to expand the scanning mindset to think about how we can
>>>> approach this problem space in a way that enables a variety of
>>>> techniques. The legacy work that has been done in this space gets us a
>>>> good way there.  We have a variety of mechanisms that enable classes
>>>>of
>>>> configurations that are security relevant to be identified and
>>>> described.  These can be used to identify relevant change events. What
>>>> is missing are the standards that describe how you implement protocols
>>>> that enable endpoint data exchange that support both scanning tasks
>>>>and
>>>> event driven publication. There are existing protocols such as NEA
>>>>that
>>>> can enable both techniques if we do the work to identify the specifics
>>>> of messaging. I would expect a similar approach would also enable
>>>> incremental scan results as well.
>>>>
>>> _______________________________________________
>>> sacm mailing list
>>> sacm@ietf.org
>>> https://www.ietf.org/mailman/listinfo/sacm
>>


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From: "Romascanu, Dan (Dan)" <dromasca@avaya.com>
To: "sacm@ietf.org" <sacm@ietf.org>
Thread-Topic: SACM at IETF-87
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Hi,=20

IETF-87 is only a few days away. The SACM WG is scheduled to meet on Friday=
, August 2. The agenda is available at https://datatracker.ietf.org/meeting=
/87/agenda/sacm/.

All presenters who plan to use slides - please send us your slides BEFORE t=
he meeting, to allow remote and on-site participants to download and read t=
hem in advance.=20

We will need two note-takers and one jabber scribe. Please volunteer in adv=
ance so that we do not waste precious time in the meeting.=20

As announced we shall hold an informal welcome and introduction meeting for=
 the first time participants in the WG at breakfast time on Thursday, Augus=
t 1st. Unless announced differently we shall meet at 8AM at the entry of th=
e breakfast space at the Intercontinental (meeting hotel).=20

We are looking forward to see you in Berlin.=20

Regards,

Adam and Dan
=20



From athiasjerome@gmail.com  Thu Jul 25 06:06:32 2013
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From: Jerome Athias <athiasjerome@gmail.com>
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Hi,

I would appreciate any feedback on this research.
http://mcaf.ee/31d9q

Thank you
Best regards

Jerome Athias

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Hi,

I would appreciate any feedback on this research.
http://mcaf.ee/31d9q

Thank you
Best regards

Jerome Athias

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From: "Romascanu, Dan (Dan)" <dromasca@avaya.com>
To: David Harrington <dbharrington@comcast.net>, "sacm@ietf.org" <sacm@ietf.org>
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Hi,

I am certainly culturally biased in this dispute for the very simple and ob=
vious reason that I have spent too much time in the IETF and too little to =
zero time in other security-oriented organizations, so I am familiar with t=
he 'IETF approach' while the 'usability.gov approach' seems strange to me.

I do have however one question that seems to me to go beyond the 'style' is=
sues. The usability.gov examples include definition and actions (procedures=
) executed by actors who are I believe what we call in IETF terms 'human op=
erators' using the network and the systems. It is very seldom that the IETF=
 defines anything that deals with human operators actions in standards-trac=
k documents. At most we may make operational recommendations, never beyond =
the BCP level.

Maybe this discussion is useful to clarify the use cases, but I do not see =
how the 'actors' actions fit into the current WG charter. Am I mistaken? Do=
 I miss something important?

Thanks and Regards,

Dan



From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf Of Dav=
id Harrington
Sent: Sunday, July 21, 2013 10:37 PM
To: sacm@ietf.org
Subject: [sacm] Use Cases Style


Hi,



There has been some debate about the amount of detail and the formality of =
the format used in our use cases document.

I have argued for IETF-style use cases; Adam has argued for a systems engin=
eering style, recommending the Martin Fowler format.



The IETF approach:



I recommended that people look at other IETF Use Case documents to see what=
 is "normal" for IETF use case documents.

Knowing that everybody is busy, I assumed few if any would actually do so.

So to move the discussion forward, I searched for RFCs with "Use Case" in t=
he title.

Then  I looked at each, and copied a quote from the text about the purpose =
of each document (where available)



I then copied in a sample use case from each document.

I was planning to make these into a PowerPoint presentation (I expected tha=
t would be very hard to do, given the space limitations of a slide).

So I chose short examples.

Feel free to look at longer examples if you want.



My samples of IETF use cases are in the attached file.

The usability.gov approach (http://www.usability.gov/how-to-and-tools/metho=
ds/use-cases.html)



Elements of a Use Case



Depending on how in depth and complex you want or need to get, use cases de=
scribe a combination of the following elements:

*Actor - anyone or anything that performs a behavior (who is using the syst=
em)

*Stakeholder - someone or something with vested interests in the behavior o=
f the system under discussion (SUD)

*Primary Actor - stakeholder who initiates an interaction with the system t=
o achieve a goal

*Preconditions - what must be true or happen before and after the use case =
runs.

*Triggers - this is the event that causes the use case to be initiated.

*Main success scenarios [Basic Flow] - use case in which nothing goes wrong=
.

*Alternative paths [Alternative Flow] - these paths are a variation on the =
main theme. These exceptions are what happen when things go wrong at the sy=
stem level.


How To Write a Use Case

Write the steps in a use case in an easy-to-understand narrative. Kenworthy=
 (1997) outlines the following steps:

1.       Identify who is going to be using the website.

2.       Pick one of those users.

3.       Define what that user wants to do on the site. Each thing the use =
does on the site becomes a use case.

4.       For each use case, decide on the normal course of events when that=
 user is using the site.

5.       Describe the basic course in the description for the use case. Des=
cribe it in terms of what the user does and what the system does in respons=
e that the user should be aware of.

6.       When the basic course is described, consider alternate courses of =
events and add those to "extend" the use case.

7.       Look for commonalities among the use cases. Extract these and note=
 them as common course use cases.

8.       Repeat the steps 2 through 7 for all other users.



Middleweight Laundry Use Case



Use Case 1: Do laundry

Actor: Housekeeper

Basic Flow: On Wednesdays, the housekeeper reports to the laundry room.  Sh=
e sorts the laundry that is there.  Then she washes each load.  She dries e=
ach load. She folds the items that need folding.  She throws away any laund=
ry item that is irrevocably shrunken, soiled or scorched.

Alternative Flow 1: If she notices that something is wrinkled, she irons it=
 and then hangs it on a hanger.

Alternative Flow 2: If she notices that something is still dirty, she rewas=
hes it.

Alternative Flow 3: If she notices that something shrank, she throws it out=
.



Adam's example use case:

Use Case Name: Suspicious Endpoint Behavior



Description:

This Use Case describes the collaboration between specific participants in =
an information security system specific to detecting a connection attempt t=
o a known-bad Internet host by a botnet zombie that has made its way onto a=
n organization's Information Technology systems.  The primary human actor i=
s the Security Operations Center Analyst, and the primary software actor is=
 the configuration assessment tool.  Note, however, the dependencies on oth=
er tools, such as asset management, intrusion detection, and messaging.





Actors:



   * Security Operations Center (SOC) Analyst,

   * Information Security Officer,

   * System Owner

   * Organizational Unit Leader



Preconditions:





   * Organizational Security Policy Exists

   * Security Policy specifies appropriate asset management capabilities (i=
.e. categorization of endpoints)

   * Security Policy specifies endpoint configuration baseline for asset ca=
tegorization

   * The Organization keeps a list of known-bad Internet hosts

   * The Organization associates owners who are individuals with endpoints

   * The Organization associates organizational units with endpoints



Postconditions:



   * Endpoint configuration has been assessed [1]

   * Results have been conveyed to scan requester



Primary Path:



  1. At 03:46 UTC an organization's Network Intrusion Detection System (NID=
S) sees an IP packet with a destination IPv6 address existing on a blacklis=
t of known botnet command and control (C2) servers.



  2. The NIDS sends an alert to the SOC Analyst.



  3. The SOC Analyst uses the information captured in the alert (IP packet =
and reason for the flag) to look up the endpoint in the organization's asse=
t inventory system and discovers that the endpoint is a Windows Server 2008=
 R2 Member Server playing the role of a File Server



  4. The SOC Analyst also verifies that the IPv6 address cited by the NIDS =
is, in fact, on the blacklist for known C2 servers.



  5. At this point, the SOC Analyst switches over to the organization's con=
figuration assessment tool



  6. The SOC Analyst locates the offending endpoint in the configuration as=
sessment tool's endpoint catalog [2]



  7. The SOC Analyst then initiates an immediate and complete endpoint asse=
ssment to determine if the endpoint has experienced any configuration drift=
 [3].



  8. The configuration assessment tool:



  9.

    a. Performs a preliminary asset inventory scan on the offending endpoin=
t, which results in a list of installed software [4][5]

    b. Performs a comparison between the last known asset inventory and the=
 present asset inventory and notes any differences

    c. Searches it's local content repository for appropriate configuration=
 baselines for the operating system of the offending endpoint and for each =
installed piece of software

    d. Upon aggregating the set of applicable configuration baselines, the =
configuration assessment tool then connects to and queries the organization=
's configuration content repository for newer baselines that may exist.

    e. If a new baseline exists, then it is returned by the configuration c=
ontent repository.



  10. The configuration management tool, having the set of updated baseline=
s, initiates a scan against the offending host, which yields a result set.



  11. The configuration management tool displays scan results to the SOC An=
alyst, which show that three new pieces of software have been installed on =
the offending endpoint where one piece of software is not on the authorized=
 software list, and that several configuration items were out of compliance=
 with the organization's established baselines.



  12. The SOC Analyst reviews the information for accuracy and to plan next=
 steps before sending the report to the responsible Information Security Of=
ficer, accountable System Owner, and the Organizational Unit Leader.





A Note On Alternative Paths, Preconditions, and Postconditions:

There are likely to be many points of optimization and optional paths.  For=
 example, a configuration assessment tool might provide a "quick glance" lo=
ok at the most recent scan history for the offending endpoint.  A SOC Analy=
st might then elect not to run a new scan (i.e. the offending endpoint is k=
nown to be out of compliance, so why run a new scan?).  Another point might=
 be that the offending endpoint is, at present, not authorized to be on the=
 network, in which case it is very likely not to exist in the configuration=
 assessment tool's endpoint catalog.





As with alternative paths, pre-/post-conditions can vary widely.  Consider =
that this description likely represents an organization on the mature side =
of managing information security.  Many organizations do not have a Securit=
y Operations Center, nor do they necessarily monitor their network.  It may=
 be the case that a log management process has detected the blacklisted con=
nection attempt  through audit trail monitoring.  Or, it may be the case th=
at a shared indicator of compromise has been used to detect the offending e=
ndpoint.





-------------------

[1] I am assuming at this point that "configuration assessment" has been de=
fined and will be understood by the reader.  What I consider to be "assessm=
ent" is that the baseline has been obtained, send to the scanning implement=
ation, endpoint configuration item values have been harvested, endpoint con=
figuration item values have been compared against baseline, and results sto=
red/forwarded as appropriate for the use case.





[2] An "endpoint catalog" is intended to convey nothing more than the notio=
n that configuration assessment tools are likely to have some method of lis=
ting, enumerating, or aggregating endpoints under configuration management.





[3] It may not be necessary to specify what we mean by "complete" or the or=
der in which scanning operations take place.  In this particular scenario, =
I thought it might be useful to illustrate that "scan levels" exist on a co=
ntinuum.





[4] Remember that the configuration assessment tool has knowledge of the of=
fending endpoint so running a preliminary inventory scan is reasonable at t=
his point.





[5] The mechanism of scan could be agent-based or remote, so details of how=
 a scan happens are omitted here.  A more granular partition of the process=
 is required for further details.



This message and attachments may contain confidential information.  If it a=
ppears that this message was sent to you by mistake, any retention, dissemi=
nation, distribution or copying of this message and attachments is strictly=
 prohibited.  Please notify the sender immediately and permanently delete t=
he message and any attachments.



My Comments:
Executive Summary:
The IETF format is what most IETF readers will expect. This format has the =
drawback of not being formal, and is not necessarily very complete. If we t=
o derive requirements from this freehand format, it can be more difficult. =
But it is easily readable, so reviewers of our work can understand what we =
are trying to accomplish. Use cases of this form help to identify the natur=
e of the stakeholders involved in our WG. Operators vs vendors, service pro=
viders vs enterprises, managed-device implementers vs management applicatio=
n developers, and so on. This can help to categorize requirements that exis=
t for some stakeholders but not all stakeholders.

I think the formal approach recommended in usability.gov would be more work=
 for the editors to lay out the use cases in this formal format, and the AS=
CII text required for RFCs makes this much harder than, say Word or HTML fo=
rmats.
Usability.gov step 2 says "pick one of the users" to document as the actor.=
 Each thing the user wants to do becomes a use case, and each possible alte=
rnative action becomes a use case.
Adam's example for Actor includes multiple roles, and then describes a rath=
er complex use case , including footnotes.

Part of my concern is that we have WG contributors coming from multiple ven=
dors, with possibly multiple products, representing customers from multiple=
 industry segments.
To fully detail each possible alternative would make it close to impossible=
 to actually finish this document in a reasonable amount of time.
I suspect Adam combined a number of use cases together in his example, to s=
implify things.
However, I cannot figure out how to create English sentences from his examp=
le because he has multiple actors and multiple preconditions and multiple p=
ostconditions, and what seems to be a lot of irrelevant details in the Prim=
ary Path. Is the fact that this happens at 3:46 UTC an important detail in =
our design? Or is it an irrelevant detail? Or is it important for some use =
cases (such as trying to establish behavior anomalies based on when a user =
normally works, or when an attack normally happens?) but not others?


I think the formal approach is over the top for our needs.
The IETF approach seems more appropriate at this point in our work process.




David Harrington

dbharrington@comcast.net<mailto:dbharrington@comcast.net>

+1-603-828-1401



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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Hi,<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">I am certainly cultura=
lly biased in this dispute for the very simple and obvious reason that I ha=
ve spent too much time in the IETF and too little to zero time in other sec=
urity-oriented organizations, so I am
 familiar with the &#8216;IETF approach&#8217; while the &#8216;</span>usab=
ility.gov approach<span style=3D"color:#1F497D">&#8217; seems strange to me=
.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">I do have however one =
question that seems to me to go beyond the &#8216;style&#8217; issues. The =
usability.gov examples include definition and actions (procedures) executed=
 by actors who are I believe what we call in IETF
 terms &#8216;human operators&#8217; using the network and the systems. It =
is very seldom that the IETF defines anything that deals with human operato=
rs actions in standards-track documents. At most we may make operational re=
commendations, never beyond the BCP level.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Maybe this discussion =
is useful to clarify the use cases, but I do not see how the &#8216;actors&=
#8217; actions fit into the current WG charter. Am I mistaken? Do I miss so=
mething important?
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Thanks and Regards,<o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Dan<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;"> sacm-bou=
nces@ietf.org [mailto:sacm-bounces@ietf.org]
<b>On Behalf Of </b>David Harrington<br>
<b>Sent:</b> Sunday, July 21, 2013 10:37 PM<br>
<b>To:</b> sacm@ietf.org<br>
<b>Subject:</b> [sacm] Use Cases Style<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">Hi,<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">There has been some debate about the amount of de=
tail and the formality of the format used in our use cases document.<o:p></=
o:p></p>
<p class=3D"MsoPlainText">I have argued for IETF-style use cases; Adam has =
argued for a systems engineering style, recommending the Martin Fowler form=
at.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<h2>The IETF approach:<o:p></o:p></h2>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">I recommended that people look at other IETF Use =
Case documents to see what is &quot;normal&quot; for IETF use case document=
s.<o:p></o:p></p>
<p class=3D"MsoPlainText">Knowing that everybody is busy, I assumed few if =
any would actually do so.<o:p></o:p></p>
<p class=3D"MsoPlainText">So to move the discussion forward, I searched for=
 RFCs with &quot;Use Case&quot; in the title.<o:p></o:p></p>
<p class=3D"MsoPlainText">Then&nbsp; I looked at each, and copied a quote f=
rom the text about the purpose of each document (where available)<o:p></o:p=
></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">I then copied in a sample use case from each docu=
ment.<o:p></o:p></p>
<p class=3D"MsoPlainText">I was planning to make these into a PowerPoint pr=
esentation (I expected that would be very hard to do, given the space limit=
ations of a slide).<o:p></o:p></p>
<p class=3D"MsoPlainText">So I chose short examples.<o:p></o:p></p>
<p class=3D"MsoPlainText">Feel free to look at longer examples if you want.=
<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">My samples of IETF use cases are in the attached =
file.<o:p></o:p></p>
<h2>The usability.gov approach (<a href=3D"http://www.usability.gov/how-to-=
and-tools/methods/use-cases.html">http://www.usability.gov/how-to-and-tools=
/methods/use-cases.html</a>)<o:p></o:p></h2>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">Elements of a Use Case<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">Depending on how in depth and complex you want or=
 need to get, use cases describe a combination of the following elements:<o=
:p></o:p></p>
<p class=3D"MsoPlainText">&#8226;Actor &#8211; anyone or anything that perf=
orms a behavior (who is using the system)<o:p></o:p></p>
<p class=3D"MsoPlainText">&#8226;Stakeholder &#8211; someone or something w=
ith vested interests in the behavior of the system under discussion (SUD)<o=
:p></o:p></p>
<p class=3D"MsoPlainText">&#8226;Primary Actor &#8211; stakeholder who init=
iates an interaction with the system to achieve a goal<o:p></o:p></p>
<p class=3D"MsoPlainText">&#8226;Preconditions &#8211; what must be true or=
 happen before and after the use case runs.<o:p></o:p></p>
<p class=3D"MsoPlainText">&#8226;Triggers &#8211; this is the event that ca=
uses the use case to be initiated.<o:p></o:p></p>
<p class=3D"MsoPlainText">&#8226;Main success scenarios [Basic Flow] &#8211=
; use case in which nothing goes wrong.<o:p></o:p></p>
<p class=3D"MsoPlainText">&#8226;Alternative paths [Alternative Flow] &#821=
1; these paths are a variation on the main theme. These exceptions are what=
 happen when things go wrong at the system level.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">How To Write a Use Case<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Write the steps in a use case in an easy-to-understa=
nd narrative. Kenworthy (1997) outlines the following steps:<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">1.<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;
</span></span><![endif]><span dir=3D"LTR"></span>Identify who is going to b=
e using the website.<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">2.<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;
</span></span><![endif]><span dir=3D"LTR"></span>Pick one of those users.<o=
:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">3.<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;
</span></span><![endif]><span dir=3D"LTR"></span>Define what that user want=
s to do on the site. Each thing the use does on the site becomes a use case=
.<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">4.<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;
</span></span><![endif]><span dir=3D"LTR"></span>For each use case, decide =
on the normal course of events when that user is using the site.<o:p></o:p>=
</p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">5.<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;
</span></span><![endif]><span dir=3D"LTR"></span>Describe the basic course =
in the description for the use case. Describe it in terms of what the user =
does and what the system does in response that the user should be aware of.=
<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">6.<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;
</span></span><![endif]><span dir=3D"LTR"></span>When the basic course is d=
escribed, consider alternate courses of events and add those to &quot;exten=
d&quot; the use case.<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">7.<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;
</span></span><![endif]><span dir=3D"LTR"></span>Look for commonalities amo=
ng the use cases. Extract these and note them as common course use cases.<o=
:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">8.<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;
</span></span><![endif]><span dir=3D"LTR"></span>Repeat the steps 2 through=
 7 for all other users.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">Middleweight Laundry Use Case<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">Use Case 1: Do laundry <o:p></o:p></p>
<p class=3D"MsoPlainText">Actor: Housekeeper <o:p></o:p></p>
<p class=3D"MsoPlainText">Basic Flow: On Wednesdays, the housekeeper report=
s to the laundry room.&nbsp; She sorts the laundry that is there.&nbsp; The=
n she washes each load.&nbsp; She dries each load. She folds the items that=
 need folding.&nbsp; She throws away any laundry item
 that is irrevocably shrunken, soiled or scorched. <o:p></o:p></p>
<p class=3D"MsoPlainText">Alternative Flow 1: If she notices that something=
 is wrinkled, she irons it and then hangs it on a hanger.
<o:p></o:p></p>
<p class=3D"MsoPlainText">Alternative Flow 2: If she notices that something=
 is still dirty, she rewashes it.
<o:p></o:p></p>
<p class=3D"MsoPlainText">Alternative Flow 3: If she notices that something=
 shrank, she throws it out.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<h2>Adam's example use case:<o:p></o:p></h2>
<p class=3D"MsoPlainText">Use Case Name: Suspicious Endpoint Behavior<o:p><=
/o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">Description: <o:p></o:p></p>
<p class=3D"MsoPlainText">This Use Case describes the collaboration between=
 specific participants in an information security system specific to detect=
ing a connection attempt to a known-bad Internet host by a botnet zombie th=
at has made its way onto an organization's
 Information Technology systems.&nbsp; The primary human actor is the Secur=
ity Operations Center Analyst, and the primary software actor is the config=
uration assessment tool.&nbsp; Note, however, the dependencies on other too=
ls, such as asset management, intrusion detection,
 and messaging.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">Actors: <o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp; * Security Operations Center (SOC) A=
nalyst, <o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp;* Information Security Officer,=
 <o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp;* System Owner<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp; * Organizational Unit Leader<o:p></o=
:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">Preconditions:<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp; * Organizational Security Policy Exi=
sts<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp; * Security Policy specifies appropri=
ate asset management capabilities (i.e. categorization of endpoints)<o:p></=
o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp; * Security Policy specifies endpoint=
 configuration baseline for asset categorization<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp; * The Organization keeps a list of k=
nown-bad Internet hosts<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp; * The Organization associates owners=
 who are individuals with endpoints<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp; * The Organization associates organi=
zational units with endpoints<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">Postconditions:<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp; * Endpoint configuration has been as=
sessed [1]<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp; * Results have been conveyed to scan=
 requester<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">Primary Path:<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp; 1. At 03:46 UTC an organization's Network =
Intrusion Detection System (NIDS) sees an IP packet with a destination IPv6=
 address existing on a blacklist of known botnet command and control (C2) s=
ervers.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp; 2. The NIDS sends an alert to the SOC Anal=
yst.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp; 3. The SOC Analyst uses the information ca=
ptured in the alert (IP packet and reason for the flag) to look up the endp=
oint in the organization's asset inventory system and discovers that the en=
dpoint is a Windows Server 2008 R2 Member
 Server playing the role of a File Server<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp; 4. The SOC Analyst also verifies that the =
IPv6 address cited by the NIDS is, in fact, on the blacklist for known C2 s=
ervers.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp; 5. At this point, the SOC Analyst switches=
 over to the organization's configuration assessment tool<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp; 6. The SOC Analyst locates the offending e=
ndpoint in the configuration assessment tool's endpoint catalog [2]<o:p></o=
:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp; 7. The SOC Analyst then initiates an immed=
iate and complete endpoint assessment to determine if the endpoint has expe=
rienced any configuration drift [3].<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp; 8. The configuration assessment tool:<o:p>=
</o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp; 9. <o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp;&nbsp;a. Performs a preliminary=
 asset inventory scan on the offending endpoint, which results in a list of=
 installed software [4][5]<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; b. Performs a comparison betwe=
en the last known asset inventory and the present asset inventory and notes=
 any differences<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; c. Searches it's local content=
 repository for appropriate configuration baselines for the operating syste=
m of the offending endpoint and for each installed piece of software<o:p></=
o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; d. Upon aggregating the set of=
 applicable configuration baselines, the configuration assessment tool then=
 connects to and queries the organization's configuration content repositor=
y for newer baselines that may exist.<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; e. If a new baseline exists, t=
hen it is returned by the configuration content repository.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp; 10. The configuration management tool, hav=
ing the set of updated baselines, initiates a scan against the offending ho=
st, which yields a result set.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp; 11. The configuration management tool disp=
lays scan results to the SOC Analyst, which show that three new pieces of s=
oftware have been installed on the offending endpoint where one piece of so=
ftware is not on the authorized software
 list, and that several configuration items were out of compliance with the=
 organization's established baselines.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp; 12. The SOC Analyst reviews the informatio=
n for accuracy and to plan next steps before sending the report to the resp=
onsible Information Security Officer, accountable System Owner, and the Org=
anizational Unit Leader.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">A Note On Alternative Paths, Preconditions, and P=
ostconditions:<o:p></o:p></p>
<p class=3D"MsoPlainText">There are likely to be many points of optimizatio=
n and optional paths.&nbsp; For example, a configuration assessment tool mi=
ght provide a &quot;quick glance&quot; look at the most recent scan history=
 for the offending endpoint.&nbsp; A SOC Analyst might
 then elect not to run a new scan (i.e. the offending endpoint is known to =
be out of compliance, so why run a new scan?).&nbsp; Another point might be=
 that the offending endpoint is, at present, not authorized to be on the ne=
twork, in which case it is very likely
 not to exist in the configuration assessment tool's endpoint catalog.<o:p>=
</o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">As with alternative paths, pre-/post-conditions c=
an vary widely.&nbsp; Consider that this description likely represents an o=
rganization on the mature side of managing information security.&nbsp; Many=
 organizations do not have a Security Operations
 Center, nor do they necessarily monitor their network.&nbsp; It may be the=
 case that a log management process has detected the blacklisted connection=
 attempt&nbsp; through audit trail monitoring.&nbsp; Or, it may be the case=
 that a shared indicator of compromise has been
 used to detect the offending endpoint.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">-------------------<o:p></o:p></p>
<p class=3D"MsoPlainText">[1] I am assuming at this point that &quot;config=
uration assessment&quot; has been defined and will be understood by the rea=
der.&nbsp; What I consider to be &quot;assessment&quot; is that the baselin=
e has been obtained, send to the scanning implementation, endpoint
 configuration item values have been harvested, endpoint configuration item=
 values have been compared against baseline, and results stored/forwarded a=
s appropriate for the use case.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">[2] An &quot;endpoint catalog&quot; is intended t=
o convey nothing more than the notion that configuration assessment tools a=
re likely to have some method of listing, enumerating, or aggregating endpo=
ints under configuration management.
<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">[3] It may not be necessary to specify what we me=
an by &quot;complete&quot; or the order in which scanning operations take p=
lace.&nbsp; In this particular scenario, I thought it might be useful to il=
lustrate that &quot;scan levels&quot; exist on a continuum.&nbsp;
<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">[4] Remember that the configuration assessment to=
ol has knowledge of the offending endpoint so running a preliminary invento=
ry scan is reasonable at this point.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">[5] The mechanism of scan could be agent-based or=
 remote, so details of how a scan happens are omitted here.&nbsp; A more gr=
anular partition of the process is required for further details.<o:p></o:p>=
</p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">This message and attachments may contain confiden=
tial information.&nbsp; If it appears that this message was sent to you by =
mistake, any retention, dissemination, distribution or copying of this mess=
age and attachments is strictly prohibited.&nbsp;
 Please notify the sender immediately and permanently delete the message an=
d any attachments.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<h2>My Comments:<o:p></o:p></h2>
<p class=3D"MsoNormal">Executive Summary:<o:p></o:p></p>
<p class=3D"MsoNormal">The IETF format is what most IETF readers will expec=
t. This format has the drawback of not being formal, and is not necessarily=
 very complete. If we to derive requirements from this freehand format, it =
can be more difficult. But it is easily
 readable, so reviewers of our work can understand what we are trying to ac=
complish. Use cases of this form help to identify the nature of the stakeho=
lders involved in our WG. Operators vs vendors, service providers vs enterp=
rises, managed-device implementers
 vs management application developers, and so on. This can help to categori=
ze requirements that exist for some stakeholders but not all stakeholders.<=
o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I think the formal approach recommended in usability=
.gov would be more work for the editors to lay out the use cases in this fo=
rmal format, and the ASCII text required for RFCs makes this much harder th=
an, say Word or HTML formats.<o:p></o:p></p>
<p class=3D"MsoNormal">Usability.gov step 2 says &#8220;pick one of the use=
rs&#8221; to document as the actor. Each thing the user wants to do becomes=
 a use case, and each possible alternative action becomes a use case.<o:p><=
/o:p></p>
<p class=3D"MsoNormal">Adam&#8217;s example for Actor includes multiple rol=
es, and then describes a rather complex use case , including footnotes.<o:p=
></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Part of my concern is that we have WG contributors c=
oming from multiple vendors, with possibly multiple products, representing =
customers from multiple industry segments.<o:p></o:p></p>
<p class=3D"MsoNormal">To fully detail each possible alternative would make=
 it close to impossible to actually finish this document in a reasonable am=
ount of time.<o:p></o:p></p>
<p class=3D"MsoNormal">I suspect Adam combined a number of use cases togeth=
er in his example, to simplify things.<o:p></o:p></p>
<p class=3D"MsoNormal">However, I cannot figure out how to create English s=
entences from his example because he has multiple actors and multiple preco=
nditions and multiple postconditions, and what seems to be a lot of irrelev=
ant details in the Primary Path. Is
 the fact that this happens at 3:46 UTC an important detail in our design? =
Or is it an irrelevant detail? Or is it important for some use cases (such =
as trying to establish behavior anomalies based on when a user normally wor=
ks, or when an attack normally happens?)
 but not others? <o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I think the formal approach is over the top for our =
needs.<o:p></o:p></p>
<p class=3D"MsoNormal">The IETF approach seems more appropriate at this poi=
nt in our work process.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">David Harrington<o:p></o:p></p>
<p class=3D"MsoPlainText"><a href=3D"mailto:dbharrington@comcast.net">dbhar=
rington@comcast.net</a><o:p></o:p></p>
<p class=3D"MsoPlainText">&#43;1-603-828-1401<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
</div>
</div>
</body>
</html>

--_000_9904FB1B0159DA42B0B887B7FA8119CA12881204AZFFEXMB04globa_--

From dromasca@avaya.com  Thu Jul 25 07:04:53 2013
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From: "Romascanu, Dan (Dan)" <dromasca@avaya.com>
To: ietfdbh <ietfdbh@comcast.net>, "sacm@ietf.org" <sacm@ietf.org>
Thread-Topic: [sacm] use cases versus requirements
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Hi,

Thanks for the effort invested until now into trying to sort out use cases =
and requirements.=20

The document has already some good parts which I believe are very useful - =
for example the terminology section.=20

Is my understanding correct that from 04 to 05 we started to transition fro=
m the initial top-down ('theoretical') approach used in the initial version=
s of the document to a bottom-up approach, collecting real-life use cases, =
describing, sorting, consolidating them, and deriving the requirements from=
 here? If so should we expect to see the couple of use cases proposed durin=
g the last week by Adam on the list by Adam be added to the use cases (toge=
ther with other that will come)? If I am correct the efforts should be now =
channeled towards adding use cases to section 3 making sure that all import=
ant use cases are covered while keeping the list at a low and manageable si=
ze, and in parallel fill in with content section 4 that covers requirements=
.=20

What is the opinion of the WG participants - is the structure of section 4 =
right or aproximatively right?=20

I would like to see the requirements in the requirement sections numbered!

Regards,

Dan

=20

> -----Original Message-----
> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf Of
> ietfdbh
> Sent: Tuesday, July 16, 2013 1:34 AM
> To: sacm@ietf.org
> Subject: [sacm] use cases versus requirements
>=20
> Hi,
>=20
> I looked up the BOF summaries from November and March.
> The summary from November says " The consensus was to start from
> requirements and then develop an architecture to explain how the use
> cases can be met.  The group has a fairly good understanding of the
> problem space, but needs to document this and present it more clearly
> with the requirements, then the architecture.  These steps need to
> happen to progress the work."  Are we paying enough attention to the
> requirements stage? We don't have a requirements doc, and that might be
> helpful.
>=20
> The summary is unclear about which comes first - use cases or
> requirements.
>=20
> The -04- version of use cases had very high-level uses cases, and then
> defined concepts and requirements from the three abstract use cases, in
> a top-down approach that led to organizing the document by (theoretical)
> requirements and then finding use cases as supporting examples of the
> requirements. As I mentioned in my previous email, I think we should be
> working in the IETF bottom-up approach, looking at multiple real-world
> implementation/deployment use cases and deriving requirements from the
> aggregation of use cases.
>=20
> The -05- version of use cases shows the lack of clarity about how this
> should be approached (and the lack of time as the deadline approached).
>=20
> Comments welcome.
>=20
> David Harrington
> ietfdbh@comcast.net
> +1-603-828-1401
>=20
>=20
> _______________________________________________
> sacm mailing list
> sacm@ietf.org
> https://www.ietf.org/mailman/listinfo/sacm

From Adam.Montville@cisecurity.org  Thu Jul 25 07:31:23 2013
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> -----Original Message-----
> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf Of
> Romascanu, Dan (Dan)
> Sent: Thursday, July 25, 2013 7:05 AM
> To: ietfdbh; sacm@ietf.org
> Subject: Re: [sacm] use cases versus requirements
>=20
> Hi,
>=20
> Thanks for the effort invested until now into trying to sort out use cas=
es and
> requirements.

+1

>=20
> The document has already some good parts which I believe are very useful=
 -
> for example the terminology section.
>=20
> Is my understanding correct that from 04 to 05 we started to transition =
from
> the initial top-down ('theoretical') approach used in the initial versio=
ns of the
> document to a bottom-up approach, collecting real-life use cases, descri=
bing,
> sorting, consolidating them, and deriving the requirements from here? If=
 so
> should we expect to see the couple of use cases proposed during the last=

> week by Adam on the list by Adam be added to the use cases (together wit=
h
> other that will come)? If I am correct the efforts should be now channel=
ed
> towards adding use cases to section 3 making sure that all important use=

> cases are covered while keeping the list at a low and manageable size, a=
nd in
> parallel fill in with content section 4 that covers requirements.

+1=20

The use cases I presented need not be included if we believe we have a sui=
table use case sampling already.  If they are included, then they can be "=
trimmed" to be less specific, if warranted. =20

I also believe we should understand that many of the use cases can be sati=
sfied, in part, with existing specifications - not all of them, but many. =
 IMO, the value of the use cases at this point is to ensure that what we'r=
e building meets the requirements from the driving needs of the enterprise=
.

>=20
> What is the opinion of the WG participants - is the structure of section=
 4 right
> or aproximatively right?

I was reviewing the document yesterday evening and I like the structure my=
self - just an opinion of one, though.

>=20
> I would like to see the requirements in the requirement=20sections numbe=
red!

+1


>=20
> Regards,
>=20
> Dan
>=20
>=20
>=20
> > -----Original Message-----
> > From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf
> > Of ietfdbh
> > Sent: Tuesday, July 16, 2013 1:34 AM
> > To: sacm@ietf.org
> > Subject: [sacm] use cases versus requirements
> >
> > Hi,
> >
> > I looked up the BOF summaries from November and March.
> > The summary from November says " The consensus was to start from
> > requirements and then develop an architecture to explain how the use
> > cases can be met.  The group has a fairly good understanding of the
> > problem space, but needs to document this and present it more clearly
> > with the requirements, then the architecture.  These steps need to
> > happen to progress the work."  Are we paying enough attention to the
> > requirements stage? We don't have a requirements doc, and that might
> > be helpful.
> >
> > The summary is unclear about which comes first - use cases or
> > requirements.
> >
> > The -04- version of use cases had very high-level uses cases, and then=

> > defined concepts and requirements from the three abstract use cases,
> > in a top-down approach that led to organizing the document by
> > (theoretical) requirements and then finding use cases as supporting
> > examples of the requirements. As I mentioned in my previous email, I
> > think we should be working in the IETF bottom-up approach, looking at
> > multiple real-world implementation/deployment use cases and deriving
> > requirements from the aggregation of use cases.
> >
> > The -05- version of use cases shows the lack of clarity about how this=

> > should be approached (and the lack of time as the deadline approached)=
.
> >
> > Comments welcome.
> >
> > David Harrington
> > ietfdbh@comcast.net
> > +1-603-828-1401
> >
> >
> > _______________________________________________
> > sacm mailing list
> > sacm@ietf.org
> > https://www.ietf.org/mailman/listinfo/sacm
> _______________________________________________
> sacm mailing list
> sacm@ietf.org
> https://www.ietf.org/mailman/listinfo/sacm
>=20
> ...

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From: Adam Montville <Adam.Montville@cisecurity.org>
To: "Waltermire, David A." <david.waltermire@nist.gov>, "sacm@ietf.org" <sacm@ietf.org>
Thread-Topic: Use Case Discussion: Vulnerable Endpoint Identification
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> -----Original Message-----
> From: Waltermire, David A. [mailto:david.waltermire@nist.gov]
> Sent: Tuesday, July 23, 2013 11:09 AM
> To: Adam Montville; sacm@ietf.org
> Subject: RE: Use Case Discussion: Vulnerable Endpoint Identification
>=20
> Adam,
>=20
> A few comments.
>=20
> In general... if our current focus is on endpoint assessment, it seems l=
ike
> much of this goes way beyond our initial scope of focus. Things like kno=
wing
> what organizational units have endpoints and who owns these endpoints is=

> important in the broader scope, but is not significant to our constraine=
d area
> of focus.

There was a similar comment with respect to my inclusion of something as d=
etailed as an event's time of occurrence.  Strictly speaking, we don't car=
e what time something happened, but what we should care about is that time=
 of change is important, so it's something we need to capture.  It's my pe=
rspective, and we need not take this perspective as a WG, that these detai=
ls are important to consider when crafting the right architecture.  Some o=
f these elements are "out of scope" in the sense that we are not solving a=
 problem related to them, but they are not necessarily "out of scope" when=
 considering how we want to craft an architecture.

>=20
> This raises the questions... should our use cases be scoped to only the
> current area of focus for the working group, or should the use cases ide=
ntify
> the broader end goal for which our work will play a part?

This, to me, will necessarily be a balancing act.  We run some risk of mis=
sing the boat if we constrain too much, and some risk of running aground i=
f we broaden too much. =20

In general, I like the use cases we have so far, though some of them seem =
to need fleshing out.  I also believe that, if we're going to be harvestin=
g information from the variety of sources represented in the 05 use case d=
ocument, we ought to be considering what properties such sources should ha=
ve, if any.  For example, the MIB sources are relatively new to me, and I =
know little about their reliability,=20but getting information from regist=
ries and server configuration files is well-known in this space.

>=20
> Other comments are inline.
>=20
> Thanks,
> Dave
>=20
> > -----Original Message-----
> > From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf
> > Of Adam Montville
> > Sent: Monday, July 15, 2013 4:59 PM
> > To: sacm@ietf.org
> > Subject: [sacm] Use Case Discussion: Vulnerable Endpoint
> > Identification
> >
> > And another...
> >
> >
> > Use Case Name: Vulnerable Endpoint Identification
> >
> > Description:
> > In this use case a zero-day exploit has been discovered in the wild,
> > which is followed by a vulnerability identification entry and indicato=
rs of
> compromise.
> > A security engineer is responsible for that portion of a situational
> > response process that determines how exposed an organization is given
> > the new state of the world.
>=20
> This seems like two use cases in one.
>=20
> Vulnerable Endpoint Identification: Typically vulnerability reports iden=
tify an
> executable or library that is vulnerable, or worst case the software tha=
t is
> vulnerable. This information is used to determine if an organization has=
 one
> or more endpoints that have exposure to a vulnerability (i.e., what endp=
oints
> are vulnerable?). It is often necessary to know where you are running
> vulnerable code and what configurations are in place on the endpoint and=

> upstream devices (e.g., IDS, firewall) that may limit the exposure. All =
of this
> information, along with details on the severity and impact of a vulnerab=
ility, is
> necessary to prioritize remedies.
>=20
> Compromised Endpoint Identification: Along with knowing if one or more
> endpoints are vulnerable, it is also important to know if you have been
> compromised. Indicators of compromise provide details that can be used t=
o
> identify malware (e.g., file hashes), identify malicious activity (e.g. =
command
> and control traffic), presence of unauthorized/malicious configuration i=
tems,
> and other indicators. While important, this goes beyond determining
> organizational exposure.
>=20
> >
> >
> > Actors:
> >
> >    * System Administrator
> >    * Vulnerability Engineer
> >    * Security Engineer
> >    * System Owner
> >    * Information Owner
> >
> >
> > Preconditions:
> >
> >    * Organizational Security Policy exists
> >    * Security Policy specifies appropriate asset management capabiliti=
es (i.e.
> > categorization of endpoints)
> >    * Security Policy specifies endpoint configuration baseline for
> > asset categorization
> >    * Security Policy specifies configuration history retention require=
ments
> >    * The Organization associates owners who are individuals with endpo=
ints
> >    * The Organization associates organizational units with endpoints
> >
> > Postconditions:
> >
> >    * Appropriate individuals in the organization have a clear
> > understanding of the organization's exposure to and potential impact o=
f
> the identified 0-day
> >    * Appropriate individuals are taking action to further assess or
> > mitigate the organization's posture regarding this 0-day
> >
> >
> > Primary Path:
> >
> >
> >   1. [External] 0-day exploit discovery [1]
> >
> >   2. Vulnerability Identification (Vulnerability ID) issued and
> > associated information published to an accessible content repository
> > [2]
>=20
> This applies to Vulnerable Endpoint Identification.
>=20
> >   3. Indicators of Compromise (IoC) are identified and published to an=

> > accessible content repository [3]
>=20
> This applies to Compromised Endpoint Identification.
>=20
> >   4. Security engineer provides the Vulnerability ID to the Asset
> > Management System
> >
> >   5. The Asset Management System queries a configured Vulnerability
> > Database to obtain a list of affected endpoint classes [4]
> >
> >   6. The Asset Management System returns a list of specific endpoints
> > that can be classified according to the endpoint class list obtained
> > in Step 5, which
> > either:
> >
> >   7.
> >     a. Presently have affected software installed, or
> >     b. Have had affected software installed.
>=20
> This supports both. Potentially compromised endpoints are those that are=

> vulnerable or may have been vulnerable historically.
>=20
> >
> >   8. The Security Engineer exports the list of potentially affected
> > endpoints
> >
> >   9. The Security Engineer initiates a vulnerability scan based on
> > IoCs, published vulnerability information, and the potentially
> > affected endpoint list.
>=20
> Is a scan necessary for identification of vulnerable endpoints? If there=
 is
> datastore that contains the current software inventory of endpoint devic=
es,
> wouldn't it be possible to check the vulnerability information against t=
hat
> data?  Use of a data store seems to be the only effective way of doing t=
his
> for historically vulnerable software.
>=20
> Vulnerability scanning has had mixed success in the past.  There has bee=
n
> little consensus in what is the best methodology for detecting vulnerabl=
e
> software using scans.  Is the software vulnerable if the software is ins=
talled?
> Is the endpoint vulnerable if the software is uninstalled and a vulnerab=
le
> library or other component is still present?
>=20
> >   10. The Vulnerability Scanner derives a set of vulnerability checks =
(i.e.
> > assessments) to perform on each listed endpoint based on information
> > associated with the provided Vulnerability ID and IoCs.
>=20
> Again, I am not sure vulnerability checks are the best approach to ident=
ify
> vulnerable endpoints.  This is getting into architecture and implementat=
ion
> details. It might be better for the endpoint to send file lists with has=
hes
> which get stored is a data store.  Deltas can be used to reduce the over=
all
> volume.  We need some discussion around the different approaches that ca=
n
> be used here.  Do we support one approach? Multiple?
>=20
> File lists with hashes can be used to identify compromised endpoints for=
 file
> indicators. Checks or configuration setting publication are probably the=
 best
> way to deal with some indicator types that relate to configuration items=
.
>=20
> >   11. The Vulnerability Scanner executes the check on each of the
> > potentially affected hosts which will return results effectively
> > equivalent to "is vulnerable," "is not vulnerable," "not checked," or =
"error"
> [5].
>=20
> What about "compromised" or "is not compromised"?
>=20
> >   12. The Security Engineer reviews the report then generates three
> > additional reports:
>=20
> I thought we are striving for automation.  Why not automate the addition=
al
> report generation?
>=20
> >   13.
> >     a. The first report provides summary information for the
> > Information Security Manager and/or higher levels of organizational
> > management as appropriate (i.e. Chief Information Security Officer)
> >     b. The second report is a list of all potentially effected
> > endpoints for which no definitive answer could be obtained by the
> Vulnerability Scanner (i.e.
> > those endpoints for which neither an "is vulnerable" nor "is not vulne=
rable"
> > result is available)
>=20
> s/effected/affected/
>=20
> See above about alternate methods vs. using a vulnerability scanner. Wha=
t
> about unreachable endpoints?
>=20
> >     c. The third report is a list of all effected endpoints (i.e.
> > those endpoints for which the checks resulted in "is vulnerable").
>=20
> s/effected/affected/
>=20
> >   14. The Security Engineer sends the first report to responsible
> > Information Security Manager(s) using relationships tracked by the
> > Asset Management System
> >
> >   15. The Security Engineer sends the second report to responsible
> > Vulnerability Engineer(s) using relationships tracked by the Asset
> > Management System
> >
> >   16. The Security Engineer sends the third report to responsible
> > System
> > Administrator(s) using relationships tracked by the Asset Management
> > System
> >
> >   17. The Security Engineer issues an alert to affected System Owners,=

> > Information Owners, and System Administrators using relationships
> > tracked by the Asset Management System
>=20
> Why can't 14-17 be automated alerts sent by the system implementing SACM=

> specifications?
>=20
> > A Note On Alternative Paths, Preconditions, and Postconditions:
> > There are likely to be many points of optimization and optional paths
> > pertaining to this Use Case.  For example, there may be greater
> > degrees of interoperability between tools in a given organization,
> > which would advance the state of automation in the "primary path"
> description herein provided.
> >
> >
> > As with alternative paths, pre-/post-conditions can vary widely.
> > Consider that this description likely represents an organization on
> > the mature side of managing information security.  Most organizations
> > are unlikely to have separate roles for Security Engineer and Vulnerab=
ility
> Engineer, for example.
> >
> >
> > --------------
> > [1] The "[External]" notation is used to indicate that, while this
> > step is included in the primary path, it is out of the organization's
> > locus of control (i.e. the step is provided for additional context in
> > the path through the use case rather than being placed in the pre-
> conditions).
> >
> >
> > [2] An "accessible" content repository may be internal or external.
> > An internal content repository may be a replication of an external
> > content repository.
> >
> >
> > [3] Often, an indicator of compromise involves assessing the state of
> > some observable object on the endpoint.  For example, an indicator of
> > compromise might be that a particular file path exists, a particular
> > setting is configured in a specific manner, a set of settings are
> > configured in a specific manner, and/or specific log entries exist.
> >
> > [4] The Vulnerability Database may be combined with the content
> > repository, but is being called out separately here to assure that the=

> > reader knows which type of data is being queried.
> >
> > [5] It is likely that additional result types will be required to
> > convey different reasons a result may not be available.
> >
> > This message and attachments may contain confidential information.  If=

> > it appears that this message was sent to you by mistake, any
> > retention, dissemination, distribution or copying of this message and
> > attachments is strictly prohibited.  Please notify the sender
> > immediately and permanently delete the message and any attachments.
> > _______________________________________________
> > sacm mailing list
> > sacm@ietf.org
> > https://www.ietf.org/mailman/listinfo/sacm
>=20
> ...

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Subject: Re: [sacm] Use Case Discussion: Vulnerable Endpoint Identification
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On 7/25/2013 10:37 AM, Adam Montville wrote:
>
>
>> -----Original Message-----
>> From: Waltermire, David A. [mailto:david.waltermire@nist.gov]
>> Sent: Tuesday, July 23, 2013 11:09 AM
>> To: Adam Montville; sacm@ietf.org
>> Subject: RE: Use Case Discussion: Vulnerable Endpoint Identification
>>
>> Adam,
>>
>> A few comments.
>>
>> In general... if our current focus is on endpoint assessment, it seems like
>> much of this goes way beyond our initial scope of focus. Things like knowing
>> what organizational units have endpoints and who owns these endpoints is
>> important in the broader scope, but is not significant to our constrained area
>> of focus.
>
> There was a similar comment with respect to my inclusion of something as detailed as an event's time of occurrence.  Strictly speaking, we don't care what time something happened, but what we should care about is that time of change is important, so it's something we need to capture.  It's my perspective, and we need not take this perspective as a WG, that these details are important to consider when crafting the right architecture.  Some of these elements are "out of scope" in the sense that we are not solving a problem related to them, but they are not necessarily "out of scope" when considering how we want to craft an architecture.

+1

The inclusion of that level of detail isn't necessary to understand the 
picture being painted by the use case, but it does point out information 
that needs to be captured that might not otherwise be apparent.




>
>>
>> This raises the questions... should our use cases be scoped to only the
>> current area of focus for the working group, or should the use cases identify
>> the broader end goal for which our work will play a part?
>
> This, to me, will necessarily be a balancing act.  We run some risk of missing the boat if we constrain too much, and some risk of running aground if we broaden too much.
>
> In general, I like the use cases we have so far, though some of them seem to need fleshing out.  I also believe that, if we're going to be harvesting information from the variety of sources represented in the 05 use case document, we ought to be considering what properties such sources should have, if any.  For example, the MIB sources are relatively new to me, and I know little about their reliability, but getting information from registries and server configuration files is well-known in this space.
>
>>
>> Other comments are inline.
>>
>> Thanks,
>> Dave
>>
>>> -----Original Message-----
>>> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf
>>> Of Adam Montville
>>> Sent: Monday, July 15, 2013 4:59 PM
>>> To: sacm@ietf.org
>>> Subject: [sacm] Use Case Discussion: Vulnerable Endpoint
>>> Identification
>>>
>>> And another...
>>>
>>>
>>> Use Case Name: Vulnerable Endpoint Identification
>>>
>>> Description:
>>> In this use case a zero-day exploit has been discovered in the wild,
>>> which is followed by a vulnerability identification entry and indicators of
>> compromise.
>>> A security engineer is responsible for that portion of a situational
>>> response process that determines how exposed an organization is given
>>> the new state of the world.
>>
>> This seems like two use cases in one.
>>
>> Vulnerable Endpoint Identification: Typically vulnerability reports identify an
>> executable or library that is vulnerable, or worst case the software that is
>> vulnerable. This information is used to determine if an organization has one
>> or more endpoints that have exposure to a vulnerability (i.e., what endpoints
>> are vulnerable?). It is often necessary to know where you are running
>> vulnerable code and what configurations are in place on the endpoint and
>> upstream devices (e.g., IDS, firewall) that may limit the exposure. All of this
>> information, along with details on the severity and impact of a vulnerability, is
>> necessary to prioritize remedies.
>>
>> Compromised Endpoint Identification: Along with knowing if one or more
>> endpoints are vulnerable, it is also important to know if you have been
>> compromised. Indicators of compromise provide details that can be used to
>> identify malware (e.g., file hashes), identify malicious activity (e.g. command
>> and control traffic), presence of unauthorized/malicious configuration items,
>> and other indicators. While important, this goes beyond determining
>> organizational exposure.
>>
>>>
>>>
>>> Actors:
>>>
>>>     * System Administrator
>>>     * Vulnerability Engineer
>>>     * Security Engineer
>>>     * System Owner
>>>     * Information Owner
>>>
>>>
>>> Preconditions:
>>>
>>>     * Organizational Security Policy exists
>>>     * Security Policy specifies appropriate asset management capabilities (i.e.
>>> categorization of endpoints)
>>>     * Security Policy specifies endpoint configuration baseline for
>>> asset categorization
>>>     * Security Policy specifies configuration history retention requirements
>>>     * The Organization associates owners who are individuals with endpoints
>>>     * The Organization associates organizational units with endpoints
>>>
>>> Postconditions:
>>>
>>>     * Appropriate individuals in the organization have a clear
>>> understanding of the organization's exposure to and potential impact of
>> the identified 0-day
>>>     * Appropriate individuals are taking action to further assess or
>>> mitigate the organization's posture regarding this 0-day
>>>
>>>
>>> Primary Path:
>>>
>>>
>>>    1. [External] 0-day exploit discovery [1]
>>>
>>>    2. Vulnerability Identification (Vulnerability ID) issued and
>>> associated information published to an accessible content repository
>>> [2]
>>
>> This applies to Vulnerable Endpoint Identification.
>>
>>>    3. Indicators of Compromise (IoC) are identified and published to an
>>> accessible content repository [3]
>>
>> This applies to Compromised Endpoint Identification.
>>
>>>    4. Security engineer provides the Vulnerability ID to the Asset
>>> Management System
>>>
>>>    5. The Asset Management System queries a configured Vulnerability
>>> Database to obtain a list of affected endpoint classes [4]
>>>
>>>    6. The Asset Management System returns a list of specific endpoints
>>> that can be classified according to the endpoint class list obtained
>>> in Step 5, which
>>> either:
>>>
>>>    7.
>>>      a. Presently have affected software installed, or
>>>      b. Have had affected software installed.
>>
>> This supports both. Potentially compromised endpoints are those that are
>> vulnerable or may have been vulnerable historically.
>>
>>>
>>>    8. The Security Engineer exports the list of potentially affected
>>> endpoints
>>>
>>>    9. The Security Engineer initiates a vulnerability scan based on
>>> IoCs, published vulnerability information, and the potentially
>>> affected endpoint list.
>>
>> Is a scan necessary for identification of vulnerable endpoints? If there is
>> datastore that contains the current software inventory of endpoint devices,
>> wouldn't it be possible to check the vulnerability information against that
>> data?  Use of a data store seems to be the only effective way of doing this
>> for historically vulnerable software.
>>
>> Vulnerability scanning has had mixed success in the past.  There has been
>> little consensus in what is the best methodology for detecting vulnerable
>> software using scans.  Is the software vulnerable if the software is installed?
>> Is the endpoint vulnerable if the software is uninstalled and a vulnerable
>> library or other component is still present?
>>
>>>    10. The Vulnerability Scanner derives a set of vulnerability checks (i.e.
>>> assessments) to perform on each listed endpoint based on information
>>> associated with the provided Vulnerability ID and IoCs.
>>
>> Again, I am not sure vulnerability checks are the best approach to identify
>> vulnerable endpoints.  This is getting into architecture and implementation
>> details. It might be better for the endpoint to send file lists with hashes
>> which get stored is a data store.  Deltas can be used to reduce the overall
>> volume.  We need some discussion around the different approaches that can
>> be used here.  Do we support one approach? Multiple?
>>
>> File lists with hashes can be used to identify compromised endpoints for file
>> indicators. Checks or configuration setting publication are probably the best
>> way to deal with some indicator types that relate to configuration items.
>>
>>>    11. The Vulnerability Scanner executes the check on each of the
>>> potentially affected hosts which will return results effectively
>>> equivalent to "is vulnerable," "is not vulnerable," "not checked," or "error"
>> [5].
>>
>> What about "compromised" or "is not compromised"?
>>
>>>    12. The Security Engineer reviews the report then generates three
>>> additional reports:
>>
>> I thought we are striving for automation.  Why not automate the additional
>> report generation?
>>
>>>    13.
>>>      a. The first report provides summary information for the
>>> Information Security Manager and/or higher levels of organizational
>>> management as appropriate (i.e. Chief Information Security Officer)
>>>      b. The second report is a list of all potentially effected
>>> endpoints for which no definitive answer could be obtained by the
>> Vulnerability Scanner (i.e.
>>> those endpoints for which neither an "is vulnerable" nor "is not vulnerable"
>>> result is available)
>>
>> s/effected/affected/
>>
>> See above about alternate methods vs. using a vulnerability scanner. What
>> about unreachable endpoints?
>>
>>>      c. The third report is a list of all effected endpoints (i.e.
>>> those endpoints for which the checks resulted in "is vulnerable").
>>
>> s/effected/affected/
>>
>>>    14. The Security Engineer sends the first report to responsible
>>> Information Security Manager(s) using relationships tracked by the
>>> Asset Management System
>>>
>>>    15. The Security Engineer sends the second report to responsible
>>> Vulnerability Engineer(s) using relationships tracked by the Asset
>>> Management System
>>>
>>>    16. The Security Engineer sends the third report to responsible
>>> System
>>> Administrator(s) using relationships tracked by the Asset Management
>>> System
>>>
>>>    17. The Security Engineer issues an alert to affected System Owners,
>>> Information Owners, and System Administrators using relationships
>>> tracked by the Asset Management System
>>
>> Why can't 14-17 be automated alerts sent by the system implementing SACM
>> specifications?
>>
>>> A Note On Alternative Paths, Preconditions, and Postconditions:
>>> There are likely to be many points of optimization and optional paths
>>> pertaining to this Use Case.  For example, there may be greater
>>> degrees of interoperability between tools in a given organization,
>>> which would advance the state of automation in the "primary path"
>> description herein provided.
>>>
>>>
>>> As with alternative paths, pre-/post-conditions can vary widely.
>>> Consider that this description likely represents an organization on
>>> the mature side of managing information security.  Most organizations
>>> are unlikely to have separate roles for Security Engineer and Vulnerability
>> Engineer, for example.
>>>
>>>
>>> --------------
>>> [1] The "[External]" notation is used to indicate that, while this
>>> step is included in the primary path, it is out of the organization's
>>> locus of control (i.e. the step is provided for additional context in
>>> the path through the use case rather than being placed in the pre-
>> conditions).
>>>
>>>
>>> [2] An "accessible" content repository may be internal or external.
>>> An internal content repository may be a replication of an external
>>> content repository.
>>>
>>>
>>> [3] Often, an indicator of compromise involves assessing the state of
>>> some observable object on the endpoint.  For example, an indicator of
>>> compromise might be that a particular file path exists, a particular
>>> setting is configured in a specific manner, a set of settings are
>>> configured in a specific manner, and/or specific log entries exist.
>>>
>>> [4] The Vulnerability Database may be combined with the content
>>> repository, but is being called out separately here to assure that the
>>> reader knows which type of data is being queried.
>>>
>>> [5] It is likely that additional result types will be required to
>>> convey different reasons a result may not be available.
>>>
>>> This message and attachments may contain confidential information.  If
>>> it appears that this message was sent to you by mistake, any
>>> retention, dissemination, distribution or copying of this message and
>>> attachments is strictly prohibited.  Please notify the sender
>>> immediately and permanently delete the message and any attachments.
>>> _______________________________________________
>>> sacm mailing list
>>> sacm@ietf.org
>>> https://www.ietf.org/mailman/listinfo/sacm
>>
>> ...
>
> This message and attachments may contain confidential information.  If it appears that this message was sent to you by mistake, any retention, dissemination, distribution or copying of this message and attachments is strictly prohibited.  Please notify the sender immediately and permanently delete the message and any attachments.
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>

From ietfdbh@comcast.net  Thu Jul 25 09:23:56 2013
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Date: Thu, 25 Jul 2013 18:23:12 -0400
From: David Harrington <ietfdbh@comcast.net>
To: "Romascanu, Dan (Dan)" <dromasca@avaya.com>, "sacm@ietf.org" <sacm@ietf.org>
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Thread-Topic: [sacm] use cases versus requirements
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Subject: Re: [sacm] use cases versus requirements
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Hi Dan,

I published -05- as a partial update.
I gathered all the use cases I think I knew about at the time.
IIRC I put Adam's in, rewritten to the informal format, but might have not
done so (I'm not looking at the doc right now).
I did find Adam's use case to be quite complex, so I may not have put it
in yet.

There have been a number of use cases discussed since -05-.
I expect to capture them in -06-.
No guarantees of when that will get published.

I started reorg'ing the doc, but haven't finished.
It unclear whether the WG wants each UC to have a
description+functions+requirements (that would lead to a LOT of duplicate
text, which I think would obscure the information badly).
An alternative would be to list all the use cases in 1 section, then
summarize the functions in a section, then derive the requirements in a
third section.
Another alternative would be to organize by general use case (asset,
config, change, vulnerability), and within each of those sections, have
subsections for use cases, functions, and requirements, so there would
liekly be some duplication between the asset mgmt and the config mgmt, but
we'd eliminate a ot of the duplication between asset uc1 and asset uc2,
and so on.

--
David Harrington
Ietfdbh@comcast.net
+1-603-828-1401





On 7/25/13 10:04 AM, "Romascanu, Dan (Dan)" <dromasca@avaya.com> wrote:

>Hi,
>
>Thanks for the effort invested until now into trying to sort out use
>cases and requirements.
>
>The document has already some good parts which I believe are very useful
>- for example the terminology section.
>
>Is my understanding correct that from 04 to 05 we started to transition
>from the initial top-down ('theoretical') approach used in the initial
>versions of the document to a bottom-up approach, collecting real-life
>use cases, describing, sorting, consolidating them, and deriving the
>requirements from here? If so should we expect to see the couple of use
>cases proposed during the last week by Adam on the list by Adam be added
>to the use cases (together with other that will come)? If I am correct
>the efforts should be now channeled towards adding use cases to section 3
>making sure that all important use cases are covered while keeping the
>list at a low and manageable size, and in parallel fill in with content
>section 4 that covers requirements.
>
>What is the opinion of the WG participants - is the structure of section
>4 right or aproximatively right?
>
>I would like to see the requirements in the requirement sections numbered!
>
>Regards,
>
>Dan
>
> 
>
>> -----Original Message-----
>> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf Of
>> ietfdbh
>> Sent: Tuesday, July 16, 2013 1:34 AM
>> To: sacm@ietf.org
>> Subject: [sacm] use cases versus requirements
>> 
>> Hi,
>> 
>> I looked up the BOF summaries from November and March.
>> The summary from November says " The consensus was to start from
>> requirements and then develop an architecture to explain how the use
>> cases can be met.  The group has a fairly good understanding of the
>> problem space, but needs to document this and present it more clearly
>> with the requirements, then the architecture.  These steps need to
>> happen to progress the work."  Are we paying enough attention to the
>> requirements stage? We don't have a requirements doc, and that might be
>> helpful.
>> 
>> The summary is unclear about which comes first - use cases or
>> requirements.
>> 
>> The -04- version of use cases had very high-level uses cases, and then
>> defined concepts and requirements from the three abstract use cases, in
>> a top-down approach that led to organizing the document by (theoretical)
>> requirements and then finding use cases as supporting examples of the
>> requirements. As I mentioned in my previous email, I think we should be
>> working in the IETF bottom-up approach, looking at multiple real-world
>> implementation/deployment use cases and deriving requirements from the
>> aggregation of use cases.
>> 
>> The -05- version of use cases shows the lack of clarity about how this
>> should be approached (and the lack of time as the deadline approached).
>> 
>> Comments welcome.
>> 
>> David Harrington
>> ietfdbh@comcast.net
>> +1-603-828-1401
>> 
>> 
>> _______________________________________________
>> sacm mailing list
>> sacm@ietf.org
>> https://www.ietf.org/mailman/listinfo/sacm



From Adam.Montville@cisecurity.org  Thu Jul 25 09:33:11 2013
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From: Adam Montville <Adam.Montville@cisecurity.org>
To: Rainer Enders <Rainer.Enders@ncp-e.com>, "sacm@ietf.org" <sacm@ietf.org>
Thread-Topic: [sacm] Appropriate Level for Use Cases
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Subject: Re: [sacm] Appropriate Level for Use Cases
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Rainer,=20

Thanks for your perspective on use cases, it's good to hear.  Sorry for th=
e delay in my response.

With respect to industry participation in standards, there is a reasonably=
 sized group of security software vendors already invested in security aut=
omation standards to date.  Moving forward, I agree that getting the word =
out will continue to be important. =20

IMHO, most of us listening to and contributing to this effort should be ac=
ting as ambassadors on behalf of the effort.  If you're involved and you s=
ee an opportunity to promote the work we're doing - and, most important, g=
et more good people involved - then you ought to be doing that.  I try to =
do this at every opportunity.  If I'm on a panel, talking to customers, or=
 just talking shop with a peer, I'm evaluating our effort's viability and =
applicability.  In effect, I evangelize (use of that word probably makes s=
ome people cringe) the benefit security automation can bring, and I raise =
its challenges.

Adam=20

> -----Original Message-----
> From: Rainer Enders [mailto:Rainer.Enders@ncp-e.com]
> Sent: Thursday, July 18, 2013 9:08 AM
> To: Adam Montville; sacm@ietf.org
> Subject: Re: [sacm] Appropriate Level for Use Cases
>=20
> Hello Adam,
>=20
>=20
> I agree with your thinking and I found your presentation of use cases
> refreshing and promising. With my background as a research engineer it
> appears, at least to me, that at times researchers and scientists tend t=
o
> overanalyze problems. Having said that I often look at use cases and won=
der
> if the work that they are intending to support is worth the effort becau=
se
> they do not offer significant substantiation and differentiation.
> We have a large number of standards and if you have a good knowledge
> base of such standards you often can imagine simplistic use cases could =
easily
> be addressed by existing standards and wonder what the value add is of t=
he
> work that is being proposed. So in that sense use cases are a critical e=
lement.
> Another related thought I have on this subject is that the lack of=20bro=
ad
> industry participation in standardization efforts is a limiting factor i=
n the sense
> that there is a difference between practical issues and theoretical issu=
es.
> Maybe a way to address this is to take discussions on standardization ef=
forts
> into more public forums (trade shows, industry events)?
>=20
> Regards,
> Rainer
>=20
> On 7/18/13 8:49 AM, "Adam Montville" <Adam.Montville@cisecurity.org>
> wrote:
>=20
> >Greetings all,
> >
> >I'd like to start a discussion here on what we, as a community, believe=

> >is the appropriate descriptive level for what we are calling a "use
> >case."  From my background - biased by computer science, electrical and=

> >computer engineering, and years of working with software development
> >groups - a "use case" is something that looks a lot like the two I sent=

> >earlier this week ([1] and [2]).
> >
> >At that level of detail, we have a better understanding of who relying
> >parties are on the capability being described and what pieces of data
> >and/or pre-requisites are=20otherwise needed for the capability to be
> >successful, which is one of the reasons I like that level of descriptio=
n.
> >
> >
> >To me, it makes sense to get what we are calling use cases to an
> >appropriate level of detail to act as representatives of requirements.
> >Requirements can be derived from the use cases, and from non-use-case
> >sources.  Then, once requirements are better known, we can move on to
> >architectures.
> >
> >Additionally, David Harrington has asked whether we're paying enough
> >attention to requirements [3], and I agree that we may not be at this
> >time.  But, I would also ask whether we ought to be just yet, at least
> >until a good set of appropriately described use cases exists.
> >
> >All that said, I think much of this work can be done in parallel or in
> >quick iterations, but I also think that, if parallel/iterative
> >development of use cases, requirements, and architecture is going to be=

> >successful, we need to discuss more here - on the list. :-)
> >
> >That's my take on it anyway.  I guess the bottom line is that we have
> >an October milestone to have an initial I-D submission to IESG for the
> >architecture, and there are two general steps that  need to complete
> >before we can feel comfortable with the architectural direction - use
> >cases and requirements.
> >
> >Thoughts?
> >
> >Adam
> >
> >
> >[1] http://www.ietf.org/mail-archive/web/sacm/current/msg01282.html
> >[2] http://www.ietf.org/mail-archive/web/sacm/current/msg01284.html
> >[3] http://www.ietf.org/mail-archive/web/sacm/current/msg01288.html
> >
> >
> >This message and attachments may contain confidential information.  If
> >it appears that this message was sent to you by mistake, any retention,=

> >dissemination, distribution or copying of this message and attachments
> >is strictly prohibited.  Please notify the sender immediately and
> >permanently delete the message and any attachments.
> >_______________________________________________
> >sacm mailing list
> >sacm@ietf.org
> >https://www.ietf.org/mailman/listinfo/sacm
>=20
> ...

This message and attachments may contain confidential information.  If it =
appears that this message was sent to you by mistake, any retention, disse=
mination, distribution or copying of this message and attachments is stric=
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From: Rainer Enders <Rainer.Enders@ncp-e.com>
To: Adam Montville <Adam.Montville@cisecurity.org>, "sacm@ietf.org" <sacm@ietf.org>
Date: Thu, 25 Jul 2013 18:51:52 +0200
Thread-Topic: [sacm] Appropriate Level for Use Cases
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Hello Adam,

I will be doing that next week again when delivering a presentation at the
BriForum in Chicago. I see myself very much as an evangelist as well.
Ambassador sounds just too political to me 8)

I don't mean to hijack this forum or enter into a more detailed discussion
about standards participation here. Just to clarify my point of view with
broader participation I meant not just vendors and government which
appears to prevail the scene. There are many other groups and
organizations that could contribute to standardization efforts. But as I
said no need to discuss this further here.

Rainer=20




On 7/25/13 9:32 AM, "Adam Montville" <Adam.Montville@cisecurity.org> wrote:

>Rainer,=20
>
>Thanks for your perspective on use cases, it's good to hear.  Sorry for
>the delay in my response.
>
>With respect to industry participation in standards, there is a
>reasonably sized group of security software vendors already invested in
>security automation standards to date.  Moving forward, I agree that
>getting the word out will continue to be important.
>
>IMHO, most of us listening to and contributing to this effort should be
>acting as ambassadors on behalf of the effort.  If you're involved and
>you see an opportunity to promote the work we're doing - and, most
>important, get more good people involved - then you ought to be doing
>that.  I try to do this at every opportunity.  If I'm on a panel, talking
>to customers, or just talking shop with a peer, I'm evaluating our
>effort's viability and applicability.  In effect, I evangelize (use of
>that word probably makes some people cringe) the benefit security
>automation can bring, and I raise its challenges.
>
>Adam=20
>
>> -----Original Message-----
>> From: Rainer Enders [mailto:Rainer.Enders@ncp-e.com]
>> Sent: Thursday, July 18, 2013 9:08 AM
>> To: Adam Montville; sacm@ietf.org
>> Subject: Re: [sacm] Appropriate Level for Use Cases
>>=20
>> Hello Adam,
>>=20
>>=20
>> I agree with your thinking and I found your presentation of use cases
>> refreshing and promising. With my background as a research engineer it
>> appears, at least to me, that at times researchers and scientists tend
>>to
>> overanalyze problems. Having said that I often look at use cases and
>>wonder
>> if the work that they are intending to support is worth the effort
>>because
>> they do not offer significant substantiation and differentiation.
>> We have a large number of standards and if you have a good knowledge
>> base of such standards you often can imagine simplistic use cases could
>>easily
>> be addressed by existing standards and wonder what the value add is of
>>the
>> work that is being proposed. So in that sense use cases are a critical
>>element.
>> Another related thought I have on this subject is that the lack of broad
>> industry participation in standardization efforts is a limiting factor
>>in the sense
>> that there is a difference between practical issues and theoretical
>>issues.
>> Maybe a way to address this is to take discussions on standardization
>>efforts
>> into more public forums (trade shows, industry events)?
>>=20
>> Regards,
>> Rainer
>>=20
>> On 7/18/13 8:49 AM, "Adam Montville" <Adam.Montville@cisecurity.org>
>> wrote:
>>=20
>> >Greetings all,
>> >
>> >I'd like to start a discussion here on what we, as a community, believe
>> >is the appropriate descriptive level for what we are calling a "use
>> >case."  From my background - biased by computer science, electrical and
>> >computer engineering, and years of working with software development
>> >groups - a "use case" is something that looks a lot like the two I sent
>> >earlier this week ([1] and [2]).
>> >
>> >At that level of detail, we have a better understanding of who relying
>> >parties are on the capability being described and what pieces of data
>> >and/or pre-requisites are otherwise needed for the capability to be
>> >successful, which is one of the reasons I like that level of
>>description.
>> >
>> >
>> >To me, it makes sense to get what we are calling use cases to an
>> >appropriate level of detail to act as representatives of requirements.
>> >Requirements can be derived from the use cases, and from non-use-case
>> >sources.  Then, once requirements are better known, we can move on to
>> >architectures.
>> >
>> >Additionally, David Harrington has asked whether we're paying enough
>> >attention to requirements [3], and I agree that we may not be at this
>> >time.  But, I would also ask whether we ought to be just yet, at least
>> >until a good set of appropriately described use cases exists.
>> >
>> >All that said, I think much of this work can be done in parallel or in
>> >quick iterations, but I also think that, if parallel/iterative
>> >development of use cases, requirements, and architecture is going to be
>> >successful, we need to discuss more here - on the list. :-)
>> >
>> >That's my take on it anyway.  I guess the bottom line is that we have
>> >an October milestone to have an initial I-D submission to IESG for the
>> >architecture, and there are two general steps that  need to complete
>> >before we can feel comfortable with the architectural direction - use
>> >cases and requirements.
>> >
>> >Thoughts?
>> >
>> >Adam
>> >
>> >
>> >[1] http://www.ietf.org/mail-archive/web/sacm/current/msg01282.html
>> >[2] http://www.ietf.org/mail-archive/web/sacm/current/msg01284.html
>> >[3] http://www.ietf.org/mail-archive/web/sacm/current/msg01288.html
>> >
>> >
>> >This message and attachments may contain confidential information.  If
>> >it appears that this message was sent to you by mistake, any retention,
>> >dissemination, distribution or copying of this message and attachments
>> >is strictly prohibited.  Please notify the sender immediately and
>> >permanently delete the message and any attachments.
>> >_______________________________________________
>> >sacm mailing list
>> >sacm@ietf.org
>> >https://www.ietf.org/mailman/listinfo/sacm
>>=20
>> ...
>
>This message and attachments may contain confidential information.  If it
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From: "Wienholt, Edward" <emwienh@nsa.gov>
To: 'Jerome Athias' <athiasjerome@gmail.com>, "sacm@ietf.org" <sacm@ietf.org>
Thread-Topic: [sacm] XORCISM eXtensible Open Research on Cyber Information Security Models
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All,

Is this a valid website?  The mcaf.ee address hints that it may be a
malicious site and that this is a phishing email.

Edward Wienholt 
I411 Cyber Security Methods & Technologies Office
Computer Network Defense Research and Technology (CND R&T) Team
Phone: 443-634-0270
Fax 410-854-4681
emwienh@nsa.gov 


-----Original Message-----
From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf Of
Jerome Athias
Sent: Thursday, July 25, 2013 9:04 AM
To: sacm@ietf.org
Subject: [sacm] XORCISM eXtensible Open Research on Cyber Information
Security Models

Hi,

I would appreciate any feedback on this research.
http://mcaf.ee/31d9q

Thank you
Best regards

Jerome Athias
_______________________________________________
sacm mailing list
sacm@ietf.org
https://www.ietf.org/mailman/listinfo/sacm

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From Adam.Montville@cisecurity.org  Thu Jul 25 10:04:26 2013
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From: Adam Montville <Adam.Montville@cisecurity.org>
To: Sean Turner <turners@ieca.com>, "sacm@ietf.org" <sacm@ietf.org>
Thread-Topic: [sacm] Fwd: I-D Action: draft-handt-sacm-asset-identifiers-00.txt
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Subject: Re: [sacm] Fwd: I-D Action: draft-handt-sacm-asset-identifiers-00.txt
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Being the transcriber of NISTS Asset Identification standard to an I-D for=
mat (now expired), I have some questions about this proposal.  First, howe=
ver, I like the way this reads and flows and I enjoyed reading it, much li=
ke I enjoyed reading the alternate architecture document.

It seems that draft-handt-sacm-asset-identifiers-00 is squarely focused on=
 instance-level identity, identification, and identifiers.  I believe, tha=
t we have several levels of "identification" requirements.  We do want ins=
tance-level identification, and I believe OIDs, as proposed, could be a go=
od solution.  I believe we also want class-level identification, for which=
 we have been considering CPE.

For example, I may have several OIDs, one for each of a Windows Server 200=
8 instance, RHEL 6 instance, Windows Server 2012 instance, and Solaris 9 i=
nstance.  Now, I want to find all the assets in the "Windows" class, which=
 would be the set of two OIDs representing the WS2008 and WS2012 instances=
.  We could leave it up to implementers to provide this type of functional=
ity, but would it not be useful to have some standardized way to represent=
 that class?

An honest question: How would this proposal handle class-level identificat=
ion?  Or, do we collectively believe there is no such need?

Adam =20

> -----Original Message-----
> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf Of
> Sean Turner
> Sent: Thursday, July 11, 2013 9:51 AM
> To: sacm@ietf.org
> Subject: [sacm] Fwd: I-D Action: draft-handt-sacm-asset-identifiers-00.t=
xt
>=20
> More food for thought.
>=20
> spt
>=20
> -------- Original Message --------
> Subject: I-D Action: draft-handt-sacm-asset-identifiers-00.txt
> Date: Thu, 11 Jul 2013 09:50:15 -0700
> From: internet-drafts@ietf.org
> Reply-To: internet-drafts@ietf.org
> To: i-d-announce@ietf.org
>=20
>=20
> A New Internet-Draft is available from the on-line Internet-Drafts direc=
tories.
>=20
>=20
> =09Title           : sacm: Asset Identifier
> =09Author(s)       : Russ Housley
>                            Sean Turner
> =09Filename   =20    : draft-handt-sacm-asset-identifiers-00.txt
> =09Pages           : 7
> =09Date            : 2013-07-11
>=20
> Abstract:
>     This document examines the asset identifiers available for sacm and
>     it proposes that OIDs (Object Identifiers) be selected as the asset
>     identifier format.
>=20
>=20
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-handt-sacm-asset-identifiers
>=20
> There's also a htmlized version available at:
> http://tools.ietf.org/html/draft-handt-sacm-asset-identifiers-00
>=20
>=20
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>=20
> _______________________________________________
> I-D-Announce mailing list
> I-D-Announce@ietf.org
> https://www.ietf.org/mailman/listinfo/i-d-announce
> Internet-Draft directories: http://www.ietf.org/shadow.html
> or ftp://ftp.ietf.org/ietf/1shadow-sites.txt
>=20
>=20
>=20
> _______________________________________________
> sacm mailing list
> sacm@ietf.org
> https://www.ietf.org/mailman/listinfo/sacm
>=20
> ...

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From athiasjerome@gmail.com  Thu Jul 25 10:13:23 2013
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From: Jerome Athias <athiasjerome@gmail.com>
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To: "Wienholt, Edward" <emwienh@nsa.gov>
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Subject: Re: [sacm] XORCISM eXtensible Open Research on Cyber Information Security Models
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It is a Secure Short URL Service

The full URL is
http://frhack.org/research/xorcism.php

Best regards
 
On Jul 25, 2013, at 9:02 PM, "Wienholt, Edward" <emwienh@nsa.gov> wrote:

> All,
> 
> Is this a valid website?  The mcaf.ee address hints that it may be a
> malicious site and that this is a phishing email.
> 
> Edward Wienholt 
> I411 Cyber Security Methods & Technologies Office
> Computer Network Defense Research and Technology (CND R&T) Team
> Phone: 443-634-0270
> Fax 410-854-4681
> emwienh@nsa.gov 
> 
> 
> -----Original Message-----
> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf Of
> Jerome Athias
> Sent: Thursday, July 25, 2013 9:04 AM
> To: sacm@ietf.org
> Subject: [sacm] XORCISM eXtensible Open Research on Cyber Information
> Security Models
> 
> Hi,
> 
> I would appreciate any feedback on this research.
> http://mcaf.ee/31d9q
> 
> Thank you
> Best regards
> 
> Jerome Athias
> _______________________________________________
> sacm mailing list
> sacm@ietf.org
> https://www.ietf.org/mailman/listinfo/sacm


From Adam.Montville@cisecurity.org  Thu Jul 25 10:37:23 2013
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Subject: Re: [sacm] Fwd: I-D Action: draft-handt-sacm-asset-identifiers-00.txt
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I may have answered my own question actually digging into it.  So, if I'm =
understanding this right, it seems like we'd be seeing arcs that would hav=
e OIDs that are named, which would have some node that acts as a class of =
the instances found below...  Maybe I'm still wrong.  More digging.

> -----Original Message-----
> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf Of
> Adam Montville
> Sent: Thursday, July 25, 2013 10:04 AM
> To: Sean Turner; sacm@ietf.org
> Subject: Re: [sacm] Fwd: I-D Action: draft-handt-sacm-asset-identifiers-=

> 00.txt
>=20
> Being the transcriber of NISTS Asset Identification standard to an I-D f=
ormat
> (now expired), I have some questions about this proposal.  First, howeve=
r, I
> like the way this reads and flows and I enjoyed reading it, much like I =
enjoyed
> reading the alternate architecture document.
>=20
> It seems that draft-handt-sacm-asset-identifiers-00 is squarely focused =
on
> instance-level identity, identification, and identifiers.  I believe, th=
at we have
> several levels of "identification" requirements.  We do want instance-le=
vel
> identification, and I believe OIDs, as proposed, could be a good solutio=
n.  I
> believe we also want class-level identification, for which we have been
> considering CPE.
>=20
> For example, I may have several OIDs, one for each of a Windows Server
> 2008 instance, RHEL 6 instance, Windows Server 2012 instance, and Solari=
s 9
> instance.  Now, I want to find all the assets in the "Windows" class, wh=
ich
> would be the set of two OIDs representing the WS2008 and WS2012
> instances.  We could leave it up to implementers to provide this type of=

> functionality, but would it not be useful to have some standardized way =
to
> represent that class?
>=20
> An honest question: How would this proposal handle class-level
> identification?  Or, do we collectively believe there is no such need?
>=20
> Adam
>=20
> > -----Original Message-----
> > From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf
> > Of Sean Turner
> > Sent: Thursday, July 11, 2013 9:51 AM
> > To: sacm@ietf.org
> > Subject: [sacm] Fwd: I-D Action:
> > draft-handt-sacm-asset-identifiers-00.txt
> >
> > More food for thought.
> >
> > spt
> >
> > -------- Original Message --------
> > Subject: I-D Action: draft-handt-sacm-asset-identifiers-00.txt
> > Date: Thu, 11 Jul 2013 09:50:15 -0700
> > From: internet-drafts@ietf.org
> > Reply-To: internet-drafts@ietf.org
> > To: i-d-announce@ietf.org
> >
> >
> > A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> >
> >
> > =09Title           : sacm: Asset Identifier
> > =09Author(s)       : Russ Housley
> >                            Sean Turner
> > =09Filename        : draft-handt-sacm-asset-identifiers-00.txt
> > =09Pages           : 7
> > =09Date            : 2013-07-11
> >
> > Abstract:
> >     This document examines the asset identifiers available for sacm an=
d
> >     it proposes that OIDs (Object Identifiers) be selected as the asse=
t
> >     identifier format.
> >
> >
> > The IETF datatracker status page for this draft is:
> > https://datatracker.ietf.org/doc/draft-handt-sacm-asset-identifiers
> >
> > There's also a htmlized version available at:
> > http://tools.ietf.org/html/draft-handt-sacm-asset-identifiers-00
> >
> >
> > Internet-Drafts are also available by anonymous FTP at:
> > ftp://ftp.ietf.org/internet-drafts/
> >
> > _______________________________________________
> > I-D-Announce mailing list
> > I-D-Announce@ietf.org
> > https://www.ietf.org/mailman/listinfo/i-d-announce
> > Internet-Draft directories: http://www.ietf.org/shadow.html or
> > ftp://ftp.ietf.org/ietf/1shadow-sites.txt
> >
> >
> >
> > _______________________________________________
> > sacm mailing list
> > sacm@ietf.org
> > https://www.ietf.org/mailman/listinfo/sacm
> >
> > ...
>=20
> This message and attachments may contain confidential information.  If i=
t
> appears that this message was sent to you by mistake, any retention,
> dissemination, distribution or copying of this message and attachments i=
s
> strictly prohibited.  Please notify the sender immediately and permanent=
ly
> delete the message and any attachments.
> _______________________________________________
> sacm mailing list
> sacm@ietf.org
> https://www.ietf.org/mailman/listinfo/sacm
>=20
> ...

This message and attachments may contain confidential information.  If it =
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tly prohibited.  Please notify the sender immediately and permanently dele=
te the message and any attachments.

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Cc: Sean Turner <turners@ieca.com>, "sacm@ietf.org" <sacm@ietf.org>
Subject: Re: [sacm] Fwd: I-D Action: draft-handt-sacm-asset-identifiers-00.txt
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On 7/25/2013 1:04 PM, Adam Montville wrote:
> Being the transcriber of NISTS Asset Identification standard to an I-D format (now expired), I have some questions about this proposal.  First, however, I like the way this reads and flows and I enjoyed reading it, much like I enjoyed reading the alternate architecture document.
>
> It seems that draft-handt-sacm-asset-identifiers-00 is squarely focused on instance-level identity, identification, and identifiers.  I believe, that we have several levels of "identification" requirements.  We do want instance-level identification, and I believe OIDs, as proposed, could be a good solution.  I believe we also want class-level identification, for which we have been considering CPE.
>
> For example, I may have several OIDs, one for each of a Windows Server 2008 instance, RHEL 6 instance, Windows Server 2012 instance, and Solaris 9 instance.  Now, I want to find all the assets in the "Windows" class, which would be the set of two OIDs representing the WS2008 and WS2012 instances.  We could leave it up to implementers to provide this type of functionality, but would it not be useful to have some standardized way to represent that class?
>
> An honest question: How would this propsal handle class-level identification?  Or, do we collectively believe there is no such need?


There is definitely a need for a class-level ID.  In fact, from a SACM 
perspective, I'd say it's more important than an instance-level ID.



--gun



>
> Adam
>
>> -----Original Message-----
>> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf Of
>> Sean Turner
>> Sent: Thursday, July 11, 2013 9:51 AM
>> To: sacm@ietf.org
>> Subject: [sacm] Fwd: I-D Action: draft-handt-sacm-asset-identifiers-00.txt
>>
>> More food for thought.
>>
>> spt
>>
>> -------- Original Message --------
>> Subject: I-D Action: draft-handt-sacm-asset-identifiers-00.txt
>> Date: Thu, 11 Jul 2013 09:50:15 -0700
>> From: internet-drafts@ietf.org
>> Reply-To: internet-drafts@ietf.org
>> To: i-d-announce@ietf.org
>>
>>
>> A New Internet-Draft is available from the on-line Internet-Drafts directories.
>>
>>
>> 	Title           : sacm: Asset Identifier
>> 	Author(s)       : Russ Housley
>>                             Sean Turner
>> 	Filename        : draft-handt-sacm-asset-identifiers-00.txt
>> 	Pages           : 7
>> 	Date            : 2013-07-11
>>
>> Abstract:
>>      This document examines the asset identifiers available for sacm and
>>      it proposes that OIDs (Object Identifiers) be selected as the asset
>>      identifier format.
>>
>>
>> The IETF datatracker status page for this draft is:
>> https://datatracker.ietf.org/doc/draft-handt-sacm-asset-identifiers
>>
>> There's also a htmlized version available at:
>> http://tools.ietf.org/html/draft-handt-sacm-asset-identifiers-00
>>
>>
>> Internet-Drafts are also available by anonymous FTP at:
>> ftp://ftp.ietf.org/internet-drafts/
>>
>> _______________________________________________
>> I-D-Announce mailing list
>> I-D-Announce@ietf.org
>> https://www.ietf.org/mailman/listinfo/i-d-announce
>> Internet-Draft directories: http://www.ietf.org/shadow.html
>> or ftp://ftp.ietf.org/ietf/1shadow-sites.txt
>>
>>
>>
>> _______________________________________________
>> sacm mailing list
>> sacm@ietf.org
>> https://www.ietf.org/mailman/listinfo/sacm
>>
>> ...
>
> This message and attachments may contain confidential information.  If it appears that this message was sent to you by mistake, any retention, dissemination, distribution or copying of this message and attachments is strictly prohibited.  Please notify the sender immediately and permanently delete the message and any attachments.
> _______________________________________________
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> https://www.ietf.org/mailman/listinfo/sacm
>

From dromasca@avaya.com  Fri Jul 26 00:26:09 2013
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From: "Romascanu, Dan (Dan)" <dromasca@avaya.com>
To: Adam Montville <Adam.Montville@cisecurity.org>, Sean Turner <turners@ieca.com>, "sacm@ietf.org" <sacm@ietf.org>
Thread-Topic: [sacm] Fwd: I-D Action: draft-handt-sacm-asset-identifiers-00.txt
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Subject: Re: [sacm] Fwd: I-D Action: draft-handt-sacm-asset-identifiers-00.txt
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OIDs are basically a tree structure. One can design the tree so that OIDs b=
elonging to the same class are grouped under the same node.=20

Would this be sufficient?=20

Regards,

Dan




> -----Original Message-----
> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf Of
> Adam Montville
> Sent: Thursday, July 25, 2013 8:37 PM
> To: Sean Turner; sacm@ietf.org
> Subject: Re: [sacm] Fwd: I-D Action: draft-handt-sacm-asset-identifiers-
> 00.txt
>=20
> I may have answered my own question actually digging into it.  So, if
> I'm understanding this right, it seems like we'd be seeing arcs that
> would have OIDs that are named, which would have some node that acts as
> a class of the instances found below...  Maybe I'm still wrong.  More
> digging.
>=20
> > -----Original Message-----
> > From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf
> > Of Adam Montville
> > Sent: Thursday, July 25, 2013 10:04 AM
> > To: Sean Turner; sacm@ietf.org
> > Subject: Re: [sacm] Fwd: I-D Action:
> > draft-handt-sacm-asset-identifiers-
> > 00.txt
> >
> > Being the transcriber of NISTS Asset Identification standard to an I-D
> > format (now expired), I have some questions about this proposal.
> > First, however, I like the way this reads and flows and I enjoyed
> > reading it, much like I enjoyed reading the alternate architecture
> document.
> >
> > It seems that draft-handt-sacm-asset-identifiers-00 is squarely
> > focused on instance-level identity, identification, and identifiers.
> > I believe, that we have several levels of "identification"
> > requirements.  We do want instance-level identification, and I believe
> > OIDs, as proposed, could be a good solution.  I believe we also want
> > class-level identification, for which we have been considering CPE.
> >
> > For example, I may have several OIDs, one for each of a Windows Server
> > 2008 instance, RHEL 6 instance, Windows Server 2012 instance, and
> > Solaris 9 instance.  Now, I want to find all the assets in the
> > "Windows" class, which would be the set of two OIDs representing the
> > WS2008 and WS2012 instances.  We could leave it up to implementers to
> > provide this type of functionality, but would it not be useful to have
> > some standardized way to represent that class?
> >
> > An honest question: How would this proposal handle class-level
> > identification?  Or, do we collectively believe there is no such need?
> >
> > Adam
> >
> > > -----Original Message-----
> > > From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf
> > > Of Sean Turner
> > > Sent: Thursday, July 11, 2013 9:51 AM
> > > To: sacm@ietf.org
> > > Subject: [sacm] Fwd: I-D Action:
> > > draft-handt-sacm-asset-identifiers-00.txt
> > >
> > > More food for thought.
> > >
> > > spt
> > >
> > > -------- Original Message --------
> > > Subject: I-D Action: draft-handt-sacm-asset-identifiers-00.txt
> > > Date: Thu, 11 Jul 2013 09:50:15 -0700
> > > From: internet-drafts@ietf.org
> > > Reply-To: internet-drafts@ietf.org
> > > To: i-d-announce@ietf.org
> > >
> > >
> > > A New Internet-Draft is available from the on-line Internet-Drafts
> > directories.
> > >
> > >
> > > 	Title           : sacm: Asset Identifier
> > > 	Author(s)       : Russ Housley
> > >                            Sean Turner
> > > 	Filename        : draft-handt-sacm-asset-identifiers-00.txt
> > > 	Pages           : 7
> > > 	Date            : 2013-07-11
> > >
> > > Abstract:
> > >     This document examines the asset identifiers available for sacm
> and
> > >     it proposes that OIDs (Object Identifiers) be selected as the
> asset
> > >     identifier format.
> > >
> > >
> > > The IETF datatracker status page for this draft is:
> > > https://datatracker.ietf.org/doc/draft-handt-sacm-asset-identifiers
> > >
> > > There's also a htmlized version available at:
> > > http://tools.ietf.org/html/draft-handt-sacm-asset-identifiers-00
> > >
> > >
> > > Internet-Drafts are also available by anonymous FTP at:
> > > ftp://ftp.ietf.org/internet-drafts/
> > >
> > > _______________________________________________
> > > I-D-Announce mailing list
> > > I-D-Announce@ietf.org
> > > https://www.ietf.org/mailman/listinfo/i-d-announce
> > > Internet-Draft directories: http://www.ietf.org/shadow.html or
> > > ftp://ftp.ietf.org/ietf/1shadow-sites.txt
> > >
> > >
> > >
> > > _______________________________________________
> > > sacm mailing list
> > > sacm@ietf.org
> > > https://www.ietf.org/mailman/listinfo/sacm
> > >
> > > ...
> >
> > This message and attachments may contain confidential information.  If
> > it appears that this message was sent to you by mistake, any
> > retention, dissemination, distribution or copying of this message and
> > attachments is strictly prohibited.  Please notify the sender
> > immediately and permanently delete the message and any attachments.
> > _______________________________________________
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> > sacm@ietf.org
> > https://www.ietf.org/mailman/listinfo/sacm
> >
> > ...
>=20
> This message and attachments may contain confidential information.  If
> it appears that this message was sent to you by mistake, any retention,
> dissemination, distribution or copying of this message and attachments
> is strictly prohibited.  Please notify the sender immediately and
> permanently delete the message and any attachments.
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> https://www.ietf.org/mailman/listinfo/sacm

From turners@ieca.com  Fri Jul 26 03:17:20 2013
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Cc: "Romascanu, Dan \(Dan\)" <dromasca@avaya.com>, "sacm@ietf.org" <sacm@ietf.org>
Subject: Re: [sacm] Fwd: I-D Action: draft-handt-sacm-asset-identifiers-00.txt
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Dan beat me to it.  It's a tree structure that may or may not have 
meaning at each "node".  It depends on what we're looking for.

spt

On 7/26/13 9:25 AM, Romascanu, Dan (Dan) wrote:
> OIDs are basically a tree structure. One can design the tree so that OIDs belonging to the same class are grouped under the same node.
>
> Would this be sufficient?
>
> Regards,
>
> Dan
>
>
>
>
>> -----Original Message-----
>> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf Of
>> Adam Montville
>> Sent: Thursday, July 25, 2013 8:37 PM
>> To: Sean Turner; sacm@ietf.org
>> Subject: Re: [sacm] Fwd: I-D Action: draft-handt-sacm-asset-identifiers-
>> 00.txt
>>
>> I may have answered my own question actually digging into it.  So, if
>> I'm understanding this right, it seems like we'd be seeing arcs that
>> would have OIDs that are named, which would have some node that acts as
>> a class of the instances found below...  Maybe I'm still wrong.  More
>> digging.
>>
>>> -----Original Message-----
>>> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf
>>> Of Adam Montville
>>> Sent: Thursday, July 25, 2013 10:04 AM
>>> To: Sean Turner; sacm@ietf.org
>>> Subject: Re: [sacm] Fwd: I-D Action:
>>> draft-handt-sacm-asset-identifiers-
>>> 00.txt
>>>
>>> Being the transcriber of NISTS Asset Identification standard to an I-D
>>> format (now expired), I have some questions about this proposal.
>>> First, however, I like the way this reads and flows and I enjoyed
>>> reading it, much like I enjoyed reading the alternate architecture
>> document.
>>>
>>> It seems that draft-handt-sacm-asset-identifiers-00 is squarely
>>> focused on instance-level identity, identification, and identifiers.
>>> I believe, that we have several levels of "identification"
>>> requirements.  We do want instance-level identification, and I believe
>>> OIDs, as proposed, could be a good solution.  I believe we also want
>>> class-level identification, for which we have been considering CPE.
>>>
>>> For example, I may have several OIDs, one for each of a Windows Server
>>> 2008 instance, RHEL 6 instance, Windows Server 2012 instance, and
>>> Solaris 9 instance.  Now, I want to find all the assets in the
>>> "Windows" class, which would be the set of two OIDs representing the
>>> WS2008 and WS2012 instances.  We could leave it up to implementers to
>>> provide this type of functionality, but would it not be useful to have
>>> some standardized way to represent that class?
>>>
>>> An honest question: How would this proposal handle class-level
>>> identification?  Or, do we collectively believe there is no such need?
>>>
>>> Adam
>>>
>>>> -----Original Message-----
>>>> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf
>>>> Of Sean Turner
>>>> Sent: Thursday, July 11, 2013 9:51 AM
>>>> To: sacm@ietf.org
>>>> Subject: [sacm] Fwd: I-D Action:
>>>> draft-handt-sacm-asset-identifiers-00.txt
>>>>
>>>> More food for thought.
>>>>
>>>> spt
>>>>
>>>> -------- Original Message --------
>>>> Subject: I-D Action: draft-handt-sacm-asset-identifiers-00.txt
>>>> Date: Thu, 11 Jul 2013 09:50:15 -0700
>>>> From: internet-drafts@ietf.org
>>>> Reply-To: internet-drafts@ietf.org
>>>> To: i-d-announce@ietf.org
>>>>
>>>>
>>>> A New Internet-Draft is available from the on-line Internet-Drafts
>>> directories.
>>>>
>>>>
>>>> 	Title           : sacm: Asset Identifier
>>>> 	Author(s)       : Russ Housley
>>>>                             Sean Turner
>>>> 	Filename        : draft-handt-sacm-asset-identifiers-00.txt
>>>> 	Pages           : 7
>>>> 	Date            : 2013-07-11
>>>>
>>>> Abstract:
>>>>      This document examines the asset identifiers available for sacm
>> and
>>>>      it proposes that OIDs (Object Identifiers) be selected as the
>> asset
>>>>      identifier format.
>>>>
>>>>
>>>> The IETF datatracker status page for this draft is:
>>>> https://datatracker.ietf.org/doc/draft-handt-sacm-asset-identifiers
>>>>
>>>> There's also a htmlized version available at:
>>>> http://tools.ietf.org/html/draft-handt-sacm-asset-identifiers-00
>>>>
>>>>
>>>> Internet-Drafts are also available by anonymous FTP at:
>>>> ftp://ftp.ietf.org/internet-drafts/
>>>>
>>>> _______________________________________________
>>>> I-D-Announce mailing list
>>>> I-D-Announce@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/i-d-announce
>>>> Internet-Draft directories: http://www.ietf.org/shadow.html or
>>>> ftp://ftp.ietf.org/ietf/1shadow-sites.txt
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> sacm mailing list
>>>> sacm@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/sacm
>>>>
>>>> ...
>>>
>>> This message and attachments may contain confidential information.  If
>>> it appears that this message was sent to you by mistake, any
>>> retention, dissemination, distribution or copying of this message and
>>> attachments is strictly prohibited.  Please notify the sender
>>> immediately and permanently delete the message and any attachments.
>>> _______________________________________________
>>> sacm mailing list
>>> sacm@ietf.org
>>> https://www.ietf.org/mailman/listinfo/sacm
>>>
>>> ...
>>
>> This message and attachments may contain confidential information.  If
>> it appears that this message was sent to you by mistake, any retention,
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>> _______________________________________________
>> sacm mailing list
>> sacm@ietf.org
>> https://www.ietf.org/mailman/listinfo/sacm
> _______________________________________________
> sacm mailing list
> sacm@ietf.org
> https://www.ietf.org/mailman/listinfo/sacm
>

From ietfdbh@comcast.net  Sat Jul 27 13:51:34 2013
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From: David Harrington <ietfdbh@comcast.net>
To: "Waltermire, David A." <david.waltermire@nist.gov>, Gunnar Engelbach <Gunnar.Engelbach@ThreatGuard.com>
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On 7/23/13 5:20 PM, "Waltermire, David A." <david.waltermire@nist.gov>
wrote:


>
>> I definitely think leveraging a CMDB when available is a net positive
>>and
>> should be supported, but it also creates other problems and should not
>>be
>> *required*.
>
>None of what we do will be required; it will all be voluntary. They key
>is to enable the endpoint to publish changes based on events. How that
>published data gets processed and persisted is a downstream concern. The
>architecture should allow for a variety of solutions that handle the info
>in various ways providing organizations and vendors with some flexibility
>in deployed architectures. What we want is a reasonable degree of
>interoperability with regards to the individual components.

See RFC 3365 "Strong Security Requirements for Internet Engineering Task
Force Standard Protocols"
To claim compliance to the standards, implementers MUST implement the
"required" aspects of the standard.
But it is up to the deployer/user/operator whether to use each feature.
So a significant portion of what we do should be "required to implement",
otherwise it isn't really a standard, and implementations will likely not
interoperate.

>
>--
>David Harrington
>Ietfdbh@comcast.net
>+1-603-828-1401
>

>



From Adam.Montville@cisecurity.org  Mon Jul 29 00:45:57 2013
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Let me know.  It would be good to get together before Friday's meeting.

Adam

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From: "Baker, Jon" <bakerj@mitre.org>
To: Sean Turner <turners@ieca.com>, Adam Montville <Adam.Montville@cisecurity.org>
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Cc: "Romascanu, Dan \(Dan\)" <dromasca@avaya.com>, "sacm@ietf.org" <sacm@ietf.org>
Subject: Re: [sacm] Fwd: I-D Action:	draft-handt-sacm-asset-identifiers-00.txt
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Quick comment on the draft. I found the following text in the CPE section:

"  Another major issue with CPE is process by which one is obtained; an
   application needs to be submitted to NVD (National Vulnerability
   Database), which is run by the USG (United States Government).  This
   simple fact likely renders CPE, as it is currently specified and
   operated, as unsatisfactory as the basis for sacm because there will
   be some non-US entity unwilling or unable to submit an application."

CPE 2.3 allows for multiple CPE dictionaries to be maintained. NIST operate=
s the Official CPE dictionary at this time, but we certainly envisioned ven=
dors operating their own CPE dictionaries. For CPE, there are outstanding q=
uestions of how best to manage cpe names.

To be clear, CPE should not be considered an Asset Identifier. It was not d=
esigned for that purpose.

Thanks,

Jon

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Jonathan O. Baker
G022 - IA Industry Collaboration
The MITRE Corporation
Email: bakerj@mitre.org


>-----Original Message-----
>From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf Of
>Sean Turner
>Sent: Friday, July 26, 2013 6:17 AM
>To: Adam Montville
>Cc: Romascanu, Dan (Dan); sacm@ietf.org
>Subject: Re: [sacm] Fwd: I-D Action: draft-handt-sacm-asset-identifiers-00=
.txt
>
>Dan beat me to it.  It's a tree structure that may or may not have
>meaning at each "node".  It depends on what we're looking for.
>
>spt
>
>On 7/26/13 9:25 AM, Romascanu, Dan (Dan) wrote:
>> OIDs are basically a tree structure. One can design the tree so that OID=
s
>belonging to the same class are grouped under the same node.
>>
>> Would this be sufficient?
>>
>> Regards,
>>
>> Dan
>>
>>
>>
>>
>>> -----Original Message-----
>>> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf
>Of
>>> Adam Montville
>>> Sent: Thursday, July 25, 2013 8:37 PM
>>> To: Sean Turner; sacm@ietf.org
>>> Subject: Re: [sacm] Fwd: I-D Action: draft-handt-sacm-asset-identifiers=
-
>>> 00.txt
>>>
>>> I may have answered my own question actually digging into it.  So, if
>>> I'm understanding this right, it seems like we'd be seeing arcs that
>>> would have OIDs that are named, which would have some node that acts
>as
>>> a class of the instances found below...  Maybe I'm still wrong.  More
>>> digging.
>>>
>>>> -----Original Message-----
>>>> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf
>>>> Of Adam Montville
>>>> Sent: Thursday, July 25, 2013 10:04 AM
>>>> To: Sean Turner; sacm@ietf.org
>>>> Subject: Re: [sacm] Fwd: I-D Action:
>>>> draft-handt-sacm-asset-identifiers-
>>>> 00.txt
>>>>
>>>> Being the transcriber of NISTS Asset Identification standard to an I-D
>>>> format (now expired), I have some questions about this proposal.
>>>> First, however, I like the way this reads and flows and I enjoyed
>>>> reading it, much like I enjoyed reading the alternate architecture
>>> document.
>>>>
>>>> It seems that draft-handt-sacm-asset-identifiers-00 is squarely
>>>> focused on instance-level identity, identification, and identifiers.
>>>> I believe, that we have several levels of "identification"
>>>> requirements.  We do want instance-level identification, and I believe
>>>> OIDs, as proposed, could be a good solution.  I believe we also want
>>>> class-level identification, for which we have been considering CPE.
>>>>
>>>> For example, I may have several OIDs, one for each of a Windows Server
>>>> 2008 instance, RHEL 6 instance, Windows Server 2012 instance, and
>>>> Solaris 9 instance.  Now, I want to find all the assets in the
>>>> "Windows" class, which would be the set of two OIDs representing the
>>>> WS2008 and WS2012 instances.  We could leave it up to implementers to
>>>> provide this type of functionality, but would it not be useful to have
>>>> some standardized way to represent that class?
>>>>
>>>> An honest question: How would this proposal handle class-level
>>>> identification?  Or, do we collectively believe there is no such need?
>>>>
>>>> Adam
>>>>
>>>>> -----Original Message-----
>>>>> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf
>>>>> Of Sean Turner
>>>>> Sent: Thursday, July 11, 2013 9:51 AM
>>>>> To: sacm@ietf.org
>>>>> Subject: [sacm] Fwd: I-D Action:
>>>>> draft-handt-sacm-asset-identifiers-00.txt
>>>>>
>>>>> More food for thought.
>>>>>
>>>>> spt
>>>>>
>>>>> -------- Original Message --------
>>>>> Subject: I-D Action: draft-handt-sacm-asset-identifiers-00.txt
>>>>> Date: Thu, 11 Jul 2013 09:50:15 -0700
>>>>> From: internet-drafts@ietf.org
>>>>> Reply-To: internet-drafts@ietf.org
>>>>> To: i-d-announce@ietf.org
>>>>>
>>>>>
>>>>> A New Internet-Draft is available from the on-line Internet-Drafts
>>>> directories.
>>>>>
>>>>>
>>>>> 	Title           : sacm: Asset Identifier
>>>>> 	Author(s)       : Russ Housley
>>>>>                             Sean Turner
>>>>> 	Filename        : draft-handt-sacm-asset-identifiers-00.txt
>>>>> 	Pages           : 7
>>>>> 	Date            : 2013-07-11
>>>>>
>>>>> Abstract:
>>>>>      This document examines the asset identifiers available for sacm
>>> and
>>>>>      it proposes that OIDs (Object Identifiers) be selected as the
>>> asset
>>>>>      identifier format.
>>>>>
>>>>>
>>>>> The IETF datatracker status page for this draft is:
>>>>> https://datatracker.ietf.org/doc/draft-handt-sacm-asset-identifiers
>>>>>
>>>>> There's also a htmlized version available at:
>>>>> http://tools.ietf.org/html/draft-handt-sacm-asset-identifiers-00
>>>>>
>>>>>
>>>>> Internet-Drafts are also available by anonymous FTP at:
>>>>> ftp://ftp.ietf.org/internet-drafts/
>>>>>
>>>>> _______________________________________________
>>>>> I-D-Announce mailing list
>>>>> I-D-Announce@ietf.org
>>>>> https://www.ietf.org/mailman/listinfo/i-d-announce
>>>>> Internet-Draft directories: http://www.ietf.org/shadow.html or
>>>>> ftp://ftp.ietf.org/ietf/1shadow-sites.txt
>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> sacm mailing list
>>>>> sacm@ietf.org
>>>>> https://www.ietf.org/mailman/listinfo/sacm
>>>>>
>>>>> ...
>>>>
>>>> This message and attachments may contain confidential information.  If
>>>> it appears that this message was sent to you by mistake, any
>>>> retention, dissemination, distribution or copying of this message and
>>>> attachments is strictly prohibited.  Please notify the sender
>>>> immediately and permanently delete the message and any attachments.
>>>> _______________________________________________
>>>> sacm mailing list
>>>> sacm@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/sacm
>>>>
>>>> ...
>>>
>>> This message and attachments may contain confidential information.  If
>>> it appears that this message was sent to you by mistake, any retention,
>>> dissemination, distribution or copying of this message and attachments
>>> is strictly prohibited.  Please notify the sender immediately and
>>> permanently delete the message and any attachments.
>>> _______________________________________________
>>> sacm mailing list
>>> sacm@ietf.org
>>> https://www.ietf.org/mailman/listinfo/sacm
>> _______________________________________________
>> sacm mailing list
>> sacm@ietf.org
>> https://www.ietf.org/mailman/listinfo/sacm
>>
>_______________________________________________
>sacm mailing list
>sacm@ietf.org
>https://www.ietf.org/mailman/listinfo/sacm

From Adam.Montville@cisecurity.org  Mon Jul 29 11:13:57 2013
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To: "sacm@ietf.org" <sacm@ietf.org>
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Chris has graciously volunteered to take notes during our meeting this Fri=
day. =20

Who can be a jabber scribe?

Adam

This message and attachments may contain confidential information.  If it =
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te the message and any attachments.

From dromasca@avaya.com  Mon Jul 29 21:55:48 2013
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From: "Romascanu, Dan (Dan)" <dromasca@avaya.com>
To: Adam Montville <Adam.Montville@cisecurity.org>, "sacm@ietf.org" <sacm@ietf.org>
Thread-Topic: Note Taker and Jabber Scribe
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It would be good to have two note takers, so that they back-up each other i=
n case one of them presents or speaks at the mike. So please, keep on volun=
teering.=20

Regards,

Dan




> -----Original Message-----
> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf Of
> Adam Montville
> Sent: Monday, July 29, 2013 9:13 PM
> To: sacm@ietf.org
> Subject: [sacm] Note Taker and Jabber Scribe
>=20
> Chris has graciously volunteered to take notes during our meeting this
> Friday.
>=20
> Who can be a jabber scribe?
>=20
> Adam
>=20
> This message and attachments may contain confidential information.  If
> it appears that this message was sent to you by mistake, any retention,
> dissemination, distribution or copying of this message and attachments
> is strictly prohibited.  Please notify the sender immediately and
> permanently delete the message and any attachments.
> _______________________________________________
> sacm mailing list
> sacm@ietf.org
> https://www.ietf.org/mailman/listinfo/sacm

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From: Adam Montville <Adam.Montville@cisecurity.org>
To: "Romascanu, Dan (Dan)" <dromasca@avaya.com>, "sacm@ietf.org" <sacm@ietf.org>
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So far we can thank Chris Ignacio for volunteering to take notes and Jon B=
aker for volunteering to be Jabber scribe... =20

We need just one more note taker...  Anyone?

Adam

> -----Original Message-----
> From: Romascanu, Dan (Dan) [mailto:dromasca@avaya.com]
> Sent: Monday, July 29, 2013 9:55 PM
> To: Adam Montville; sacm@ietf.org
> Subject: RE: Note Taker and Jabber Scribe
>=20
> It would be good to have two note takers, so that they back-up each othe=
r in
> case one of them presents or speaks at the mike. So please, keep on
> volunteering.
>=20
> Regards,
>=20
> Dan
>=20
>=20
>=20
>=20
> > -----Original Message-----
> > From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf
> > Of Adam Montville
> > Sent: Monday, July 29, 2013 9:13 PM
> > To: sacm@ietf.org
> > Subject: [sacm] Note Taker and Jabber Scribe
> >
> > Chris has graciously volunteered to take notes during our meeting this=

> > Friday.
> >
> > Who can be a jabber scribe?
> >
> > Adam
> >
> > This message and attachments may contain confidential information.  If=

> > it appears that this message was sent to you by mistake, any
> > retention, dissemination, distribution or copying of this message and
> > attachments is strictly prohibited.  Please notify the sender
> > immediately and permanently delete the message and any attachments.
> > _______________________________________________
> > sacm mailing list
> > sacm@ietf.org
> > https://www.ietf.org/mailman/listinfo/sacm
>=20
> ...

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From: "Romascanu, Dan (Dan)" <dromasca@avaya.com>
To: "sacm@ietf.org" <sacm@ietf.org>
Thread-Topic: SACM at IETF-87
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This is a reminder that:=20

- the SACM meeting is scheduled for Friday 8/2
- we need slides in advance from all presenters
- we are still in need of one volunteer for notes taking and jabber
- we shall meet tomorrow morning (Thursday 8/1) at breakfast for a welcome =
session for newcomers. Meeting place at 8AM at the entry of the breakfast p=
lace of the InterContinental hotel (LA Caf=E9)

Regards,

Adam and Dan




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From: Adam Montville <Adam.Montville@cisecurity.org>
To: "sacm@ietf.org" <sacm@ietf.org>
Thread-Topic: Updated sacm Agenda
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Please note that the sacm agenda has been updated.

See: http://www.ietf.org/proceedings/87/agenda/agenda-87-sacm

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From: Stephen Hanna <shanna@juniper.net>
To: "Romascanu, Dan (Dan)" <dromasca@avaya.com>, David Harrington <dbharrington@comcast.net>, "sacm@ietf.org" <sacm@ietf.org>
Thread-Topic: [sacm] Use Cases Style
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Subject: Re: [sacm] Use Cases Style
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I should have responded to this thread earlier. I have been waiting to find=
 enough time to write a long response as Dan did. However, it seems that I =
won't find that time before the SACM WG meeting so I'll just say:

I also favor the IETF approach to use case style: a brief summary of the pr=
oblem to be solved.

In my view, providing a detailed walkthrough of the solution tends to restr=
ict the architectural options. We're not ready for that yet. Instead, we sh=
ould focus our use cases on the problem to be solved.

Thanks,

Steve

From: sacm-bounces@ietf.org<mailto:sacm-bounces@ietf.org> [mailto:sacm-boun=
ces@ietf.org] On Behalf Of Romascanu, Dan (Dan)
Sent: Thursday, July 25, 2013 9:41 AM
To: David Harrington; sacm@ietf.org<mailto:sacm@ietf.org>
Subject: Re: [sacm] Use Cases Style

Hi,

I am certainly culturally biased in this dispute for the very simple and ob=
vious reason that I have spent too much time in the IETF and too little to =
zero time in other security-oriented organizations, so I am familiar with t=
he 'IETF approach' while the 'usability.gov approach' seems strange to me.

I do have however one question that seems to me to go beyond the 'style' is=
sues. The usability.gov examples include definition and actions (procedures=
) executed by actors who are I believe what we call in IETF terms 'human op=
erators' using the network and the systems. It is very seldom that the IETF=
 defines anything that deals with human operators actions in standards-trac=
k documents. At most we may make operational recommendations, never beyond =
the BCP level.

Maybe this discussion is useful to clarify the use cases, but I do not see =
how the 'actors' actions fit into the current WG charter. Am I mistaken? Do=
 I miss something important?

Thanks and Regards,

Dan



From: sacm-bounces@ietf.org<mailto:sacm-bounces@ietf.org> [mailto:sacm-boun=
ces@ietf.org] On Behalf Of David Harrington
Sent: Sunday, July 21, 2013 10:37 PM
To: sacm@ietf.org<mailto:sacm@ietf.org>
Subject: [sacm] Use Cases Style


Hi,



There has been some debate about the amount of detail and the formality of =
the format used in our use cases document.

I have argued for IETF-style use cases; Adam has argued for a systems engin=
eering style, recommending the Martin Fowler format.



The IETF approach:



I recommended that people look at other IETF Use Case documents to see what=
 is "normal" for IETF use case documents.

Knowing that everybody is busy, I assumed few if any would actually do so.

So to move the discussion forward, I searched for RFCs with "Use Case" in t=
he title.

Then  I looked at each, and copied a quote from the text about the purpose =
of each document (where available)



I then copied in a sample use case from each document.

I was planning to make these into a PowerPoint presentation (I expected tha=
t would be very hard to do, given the space limitations of a slide).

So I chose short examples.

Feel free to look at longer examples if you want.



My samples of IETF use cases are in the attached file.

The usability.gov approach (http://www.usability.gov/how-to-and-tools/metho=
ds/use-cases.html)



Elements of a Use Case



Depending on how in depth and complex you want or need to get, use cases de=
scribe a combination of the following elements:

*Actor - anyone or anything that performs a behavior (who is using the syst=
em)

*Stakeholder - someone or something with vested interests in the behavior o=
f the system under discussion (SUD)

*Primary Actor - stakeholder who initiates an interaction with the system t=
o achieve a goal

*Preconditions - what must be true or happen before and after the use case =
runs.

*Triggers - this is the event that causes the use case to be initiated.

*Main success scenarios [Basic Flow] - use case in which nothing goes wrong=
.

*Alternative paths [Alternative Flow] - these paths are a variation on the =
main theme. These exceptions are what happen when things go wrong at the sy=
stem level.


How To Write a Use Case

Write the steps in a use case in an easy-to-understand narrative. Kenworthy=
 (1997) outlines the following steps:

1.       Identify who is going to be using the website.

2.       Pick one of those users.

3.       Define what that user wants to do on the site. Each thing the use =
does on the site becomes a use case.

4.       For each use case, decide on the normal course of events when that=
 user is using the site.

5.       Describe the basic course in the description for the use case. Des=
cribe it in terms of what the user does and what the system does in respons=
e that the user should be aware of.

6.       When the basic course is described, consider alternate courses of =
events and add those to "extend" the use case.

7.       Look for commonalities among the use cases. Extract these and note=
 them as common course use cases.

8.       Repeat the steps 2 through 7 for all other users.



Middleweight Laundry Use Case



Use Case 1: Do laundry

Actor: Housekeeper

Basic Flow: On Wednesdays, the housekeeper reports to the laundry room.  Sh=
e sorts the laundry that is there.  Then she washes each load.  She dries e=
ach load. She folds the items that need folding.  She throws away any laund=
ry item that is irrevocably shrunken, soiled or scorched.

Alternative Flow 1: If she notices that something is wrinkled, she irons it=
 and then hangs it on a hanger.

Alternative Flow 2: If she notices that something is still dirty, she rewas=
hes it.

Alternative Flow 3: If she notices that something shrank, she throws it out=
.



Adam's example use case:

Use Case Name: Suspicious Endpoint Behavior



Description:

This Use Case describes the collaboration between specific participants in =
an information security system specific to detecting a connection attempt t=
o a known-bad Internet host by a botnet zombie that has made its way onto a=
n organization's Information Technology systems.  The primary human actor i=
s the Security Operations Center Analyst, and the primary software actor is=
 the configuration assessment tool.  Note, however, the dependencies on oth=
er tools, such as asset management, intrusion detection, and messaging.





Actors:



   * Security Operations Center (SOC) Analyst,

   * Information Security Officer,

   * System Owner

   * Organizational Unit Leader



Preconditions:





   * Organizational Security Policy Exists

   * Security Policy specifies appropriate asset management capabilities (i=
.e. categorization of endpoints)

   * Security Policy specifies endpoint configuration baseline for asset ca=
tegorization

   * The Organization keeps a list of known-bad Internet hosts

   * The Organization associates owners who are individuals with endpoints

   * The Organization associates organizational units with endpoints



Postconditions:



   * Endpoint configuration has been assessed [1]

   * Results have been conveyed to scan requester



Primary Path:



  1. At 03:46 UTC an organization's Network Intrusion Detection System (NID=
S) sees an IP packet with a destination IPv6 address existing on a blacklis=
t of known botnet command and control (C2) servers.



  2. The NIDS sends an alert to the SOC Analyst.



  3. The SOC Analyst uses the information captured in the alert (IP packet =
and reason for the flag) to look up the endpoint in the organization's asse=
t inventory system and discovers that the endpoint is a Windows Server 2008=
 R2 Member Server playing the role of a File Server



  4. The SOC Analyst also verifies that the IPv6 address cited by the NIDS =
is, in fact, on the blacklist for known C2 servers.



  5. At this point, the SOC Analyst switches over to the organization's con=
figuration assessment tool



  6. The SOC Analyst locates the offending endpoint in the configuration as=
sessment tool's endpoint catalog [2]



  7. The SOC Analyst then initiates an immediate and complete endpoint asse=
ssment to determine if the endpoint has experienced any configuration drift=
 [3].



  8. The configuration assessment tool:



  9.

    a. Performs a preliminary asset inventory scan on the offending endpoin=
t, which results in a list of installed software [4][5]

    b. Performs a comparison between the last known asset inventory and the=
 present asset inventory and notes any differences

    c. Searches it's local content repository for appropriate configuration=
 baselines for the operating system of the offending endpoint and for each =
installed piece of software

    d. Upon aggregating the set of applicable configuration baselines, the =
configuration assessment tool then connects to and queries the organization=
's configuration content repository for newer baselines that may exist.

    e. If a new baseline exists, then it is returned by the configuration c=
ontent repository.



  10. The configuration management tool, having the set of updated baseline=
s, initiates a scan against the offending host, which yields a result set.



  11. The configuration management tool displays scan results to the SOC An=
alyst, which show that three new pieces of software have been installed on =
the offending endpoint where one piece of software is not on the authorized=
 software list, and that several configuration items were out of compliance=
 with the organization's established baselines.



  12. The SOC Analyst reviews the information for accuracy and to plan next=
 steps before sending the report to the responsible Information Security Of=
ficer, accountable System Owner, and the Organizational Unit Leader.





A Note On Alternative Paths, Preconditions, and Postconditions:

There are likely to be many points of optimization and optional paths.  For=
 example, a configuration assessment tool might provide a "quick glance" lo=
ok at the most recent scan history for the offending endpoint.  A SOC Analy=
st might then elect not to run a new scan (i.e. the offending endpoint is k=
nown to be out of compliance, so why run a new scan?).  Another point might=
 be that the offending endpoint is, at present, not authorized to be on the=
 network, in which case it is very likely not to exist in the configuration=
 assessment tool's endpoint catalog.





As with alternative paths, pre-/post-conditions can vary widely.  Consider =
that this description likely represents an organization on the mature side =
of managing information security.  Many organizations do not have a Securit=
y Operations Center, nor do they necessarily monitor their network.  It may=
 be the case that a log management process has detected the blacklisted con=
nection attempt  through audit trail monitoring.  Or, it may be the case th=
at a shared indicator of compromise has been used to detect the offending e=
ndpoint.





-------------------

[1] I am assuming at this point that "configuration assessment" has been de=
fined and will be understood by the reader.  What I consider to be "assessm=
ent" is that the baseline has been obtained, send to the scanning implement=
ation, endpoint configuration item values have been harvested, endpoint con=
figuration item values have been compared against baseline, and results sto=
red/forwarded as appropriate for the use case.





[2] An "endpoint catalog" is intended to convey nothing more than the notio=
n that configuration assessment tools are likely to have some method of lis=
ting, enumerating, or aggregating endpoints under configuration management.





[3] It may not be necessary to specify what we mean by "complete" or the or=
der in which scanning operations take place.  In this particular scenario, =
I thought it might be useful to illustrate that "scan levels" exist on a co=
ntinuum.





[4] Remember that the configuration assessment tool has knowledge of the of=
fending endpoint so running a preliminary inventory scan is reasonable at t=
his point.





[5] The mechanism of scan could be agent-based or remote, so details of how=
 a scan happens are omitted here.  A more granular partition of the process=
 is required for further details.



This message and attachments may contain confidential information.  If it a=
ppears that this message was sent to you by mistake, any retention, dissemi=
nation, distribution or copying of this message and attachments is strictly=
 prohibited.  Please notify the sender immediately and permanently delete t=
he message and any attachments.



My Comments:
Executive Summary:
The IETF format is what most IETF readers will expect. This format has the =
drawback of not being formal, and is not necessarily very complete. If we t=
o derive requirements from this freehand format, it can be more difficult. =
But it is easily readable, so reviewers of our work can understand what we =
are trying to accomplish. Use cases of this form help to identify the natur=
e of the stakeholders involved in our WG. Operators vs vendors, service pro=
viders vs enterprises, managed-device implementers vs management applicatio=
n developers, and so on. This can help to categorize requirements that exis=
t for some stakeholders but not all stakeholders.

I think the formal approach recommended in usability.gov would be more work=
 for the editors to lay out the use cases in this formal format, and the AS=
CII text required for RFCs makes this much harder than, say Word or HTML fo=
rmats.
Usability.gov step 2 says "pick one of the users" to document as the actor.=
 Each thing the user wants to do becomes a use case, and each possible alte=
rnative action becomes a use case.
Adam's example for Actor includes multiple roles, and then describes a rath=
er complex use case , including footnotes.

Part of my concern is that we have WG contributors coming from multiple ven=
dors, with possibly multiple products, representing customers from multiple=
 industry segments.
To fully detail each possible alternative would make it close to impossible=
 to actually finish this document in a reasonable amount of time.
I suspect Adam combined a number of use cases together in his example, to s=
implify things.
However, I cannot figure out how to create English sentences from his examp=
le because he has multiple actors and multiple preconditions and multiple p=
ostconditions, and what seems to be a lot of irrelevant details in the Prim=
ary Path. Is the fact that this happens at 3:46 UTC an important detail in =
our design? Or is it an irrelevant detail? Or is it important for some use =
cases (such as trying to establish behavior anomalies based on when a user =
normally works, or when an attack normally happens?) but not others?


I think the formal approach is over the top for our needs.
The IETF approach seems more appropriate at this point in our work process.




David Harrington

dbharrington@comcast.net<mailto:dbharrington@comcast.net>

+1-603-828-1401



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<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">I should have responde=
d to this thread earlier. I have been waiting to find enough time to write =
a long response as Dan did. However, it seems that I won&#8217;t find that =
time before the SACM WG meeting so I&#8217;ll just
 say:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">I also favor the IETF =
approach to use case style: a brief summary of the problem to be solved.<o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">In my view, providing =
a detailed walkthrough of the solution tends to restrict the architectural =
options. We&#8217;re not ready for that yet. Instead, we should focus our u=
se cases on the problem to be solved.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Thanks,<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Steve<o:p></o:p></span=
></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">
<a href=3D"mailto:sacm-bounces@ietf.org">sacm-bounces@ietf.org</a> [<a href=
=3D"mailto:sacm-bounces@ietf.org">mailto:sacm-bounces@ietf.org</a>]
<b>On Behalf Of </b>Romascanu, Dan (Dan)<br>
<b>Sent:</b> Thursday, July 25, 2013 9:41 AM<br>
<b>To:</b> David Harrington; <a href=3D"mailto:sacm@ietf.org">sacm@ietf.org=
</a><br>
<b>Subject:</b> Re: [sacm] Use Cases Style<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Hi,<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">I am certainly cultura=
lly biased in this dispute for the very simple and obvious reason that I ha=
ve spent too much time in the IETF and too little to zero time in other sec=
urity-oriented organizations, so I am
 familiar with the &#8216;IETF approach&#8217; while the &#8216;</span>usab=
ility.gov approach<span style=3D"color:#1F497D">&#8217; seems strange to me=
.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">I do have however one =
question that seems to me to go beyond the &#8216;style&#8217; issues. The =
usability.gov examples include definition and actions (procedures) executed=
 by actors who are I believe what we call in IETF
 terms &#8216;human operators&#8217; using the network and the systems. It =
is very seldom that the IETF defines anything that deals with human operato=
rs actions in standards-track documents. At most we may make operational re=
commendations, never beyond the BCP level.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Maybe this discussion =
is useful to clarify the use cases, but I do not see how the &#8216;actors&=
#8217; actions fit into the current WG charter. Am I mistaken? Do I miss so=
mething important?
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Thanks and Regards,<o:=
p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D">Dan<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#1F497D"><o:p>&nbsp;</o:p></spa=
n></p>
<div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in =
4.0pt">
<div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in =
0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.0pt;font-family:&quot=
;Tahoma&quot;,&quot;sans-serif&quot;">From:</span></b><span style=3D"font-s=
ize:10.0pt;font-family:&quot;Tahoma&quot;,&quot;sans-serif&quot;">
<a href=3D"mailto:sacm-bounces@ietf.org">sacm-bounces@ietf.org</a> [<a href=
=3D"mailto:sacm-bounces@ietf.org">mailto:sacm-bounces@ietf.org</a>]
<b>On Behalf Of </b>David Harrington<br>
<b>Sent:</b> Sunday, July 21, 2013 10:37 PM<br>
<b>To:</b> <a href=3D"mailto:sacm@ietf.org">sacm@ietf.org</a><br>
<b>Subject:</b> [sacm] Use Cases Style<o:p></o:p></span></p>
</div>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">Hi,<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">There has been some debate about the amount of de=
tail and the formality of the format used in our use cases document.<o:p></=
o:p></p>
<p class=3D"MsoPlainText">I have argued for IETF-style use cases; Adam has =
argued for a systems engineering style, recommending the Martin Fowler form=
at.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<h2>The IETF approach:<o:p></o:p></h2>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">I recommended that people look at other IETF Use =
Case documents to see what is &quot;normal&quot; for IETF use case document=
s.<o:p></o:p></p>
<p class=3D"MsoPlainText">Knowing that everybody is busy, I assumed few if =
any would actually do so.<o:p></o:p></p>
<p class=3D"MsoPlainText">So to move the discussion forward, I searched for=
 RFCs with &quot;Use Case&quot; in the title.<o:p></o:p></p>
<p class=3D"MsoPlainText">Then&nbsp; I looked at each, and copied a quote f=
rom the text about the purpose of each document (where available)<o:p></o:p=
></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">I then copied in a sample use case from each docu=
ment.<o:p></o:p></p>
<p class=3D"MsoPlainText">I was planning to make these into a PowerPoint pr=
esentation (I expected that would be very hard to do, given the space limit=
ations of a slide).<o:p></o:p></p>
<p class=3D"MsoPlainText">So I chose short examples.<o:p></o:p></p>
<p class=3D"MsoPlainText">Feel free to look at longer examples if you want.=
<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">My samples of IETF use cases are in the attached =
file.<o:p></o:p></p>
<h2>The usability.gov approach (<a href=3D"http://www.usability.gov/how-to-=
and-tools/methods/use-cases.html">http://www.usability.gov/how-to-and-tools=
/methods/use-cases.html</a>)<o:p></o:p></h2>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">Elements of a Use Case<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">Depending on how in depth and complex you want or=
 need to get, use cases describe a combination of the following elements:<o=
:p></o:p></p>
<p class=3D"MsoPlainText">&#8226;Actor &#8211; anyone or anything that perf=
orms a behavior (who is using the system)<o:p></o:p></p>
<p class=3D"MsoPlainText">&#8226;Stakeholder &#8211; someone or something w=
ith vested interests in the behavior of the system under discussion (SUD)<o=
:p></o:p></p>
<p class=3D"MsoPlainText">&#8226;Primary Actor &#8211; stakeholder who init=
iates an interaction with the system to achieve a goal<o:p></o:p></p>
<p class=3D"MsoPlainText">&#8226;Preconditions &#8211; what must be true or=
 happen before and after the use case runs.<o:p></o:p></p>
<p class=3D"MsoPlainText">&#8226;Triggers &#8211; this is the event that ca=
uses the use case to be initiated.<o:p></o:p></p>
<p class=3D"MsoPlainText">&#8226;Main success scenarios [Basic Flow] &#8211=
; use case in which nothing goes wrong.<o:p></o:p></p>
<p class=3D"MsoPlainText">&#8226;Alternative paths [Alternative Flow] &#821=
1; these paths are a variation on the main theme. These exceptions are what=
 happen when things go wrong at the system level.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">How To Write a Use Case<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Write the steps in a use case in an easy-to-understa=
nd narrative. Kenworthy (1997) outlines the following steps:<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">1.<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;
</span></span><![endif]>Identify who is going to be using the website.<o:p>=
</o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">2.<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;
</span></span><![endif]>Pick one of those users.<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">3.<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;
</span></span><![endif]>Define what that user wants to do on the site. Each=
 thing the use does on the site becomes a use case.<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">4.<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;
</span></span><![endif]>For each use case, decide on the normal course of e=
vents when that user is using the site.<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">5.<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;
</span></span><![endif]>Describe the basic course in the description for th=
e use case. Describe it in terms of what the user does and what the system =
does in response that the user should be aware of.<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">6.<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;
</span></span><![endif]>When the basic course is described, consider altern=
ate courses of events and add those to &quot;extend&quot; the use case.<o:p=
></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">7.<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;
</span></span><![endif]>Look for commonalities among the use cases. Extract=
 these and note them as common course use cases.<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo2"><![if !supportLists]><span style=3D"mso-list:Ignore">8.<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&=
nbsp;
</span></span><![endif]>Repeat the steps 2 through 7 for all other users.<o=
:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">Middleweight Laundry Use Case<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">Use Case 1: Do laundry <o:p></o:p></p>
<p class=3D"MsoPlainText">Actor: Housekeeper <o:p></o:p></p>
<p class=3D"MsoPlainText">Basic Flow: On Wednesdays, the housekeeper report=
s to the laundry room.&nbsp; She sorts the laundry that is there.&nbsp; The=
n she washes each load.&nbsp; She dries each load. She folds the items that=
 need folding.&nbsp; She throws away any laundry item
 that is irrevocably shrunken, soiled or scorched. <o:p></o:p></p>
<p class=3D"MsoPlainText">Alternative Flow 1: If she notices that something=
 is wrinkled, she irons it and then hangs it on a hanger.
<o:p></o:p></p>
<p class=3D"MsoPlainText">Alternative Flow 2: If she notices that something=
 is still dirty, she rewashes it.
<o:p></o:p></p>
<p class=3D"MsoPlainText">Alternative Flow 3: If she notices that something=
 shrank, she throws it out.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<h2>Adam's example use case:<o:p></o:p></h2>
<p class=3D"MsoPlainText">Use Case Name: Suspicious Endpoint Behavior<o:p><=
/o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">Description: <o:p></o:p></p>
<p class=3D"MsoPlainText">This Use Case describes the collaboration between=
 specific participants in an information security system specific to detect=
ing a connection attempt to a known-bad Internet host by a botnet zombie th=
at has made its way onto an organization's
 Information Technology systems.&nbsp; The primary human actor is the Secur=
ity Operations Center Analyst, and the primary software actor is the config=
uration assessment tool.&nbsp; Note, however, the dependencies on other too=
ls, such as asset management, intrusion detection,
 and messaging.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">Actors: <o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp; * Security Operations Center (SOC) A=
nalyst, <o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp;* Information Security Officer,=
 <o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp;* System Owner<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp; * Organizational Unit Leader<o:p></o=
:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">Preconditions:<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp; * Organizational Security Policy Exi=
sts<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp; * Security Policy specifies appropri=
ate asset management capabilities (i.e. categorization of endpoints)<o:p></=
o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp; * Security Policy specifies endpoint=
 configuration baseline for asset categorization<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp; * The Organization keeps a list of k=
nown-bad Internet hosts<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp; * The Organization associates owners=
 who are individuals with endpoints<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp; * The Organization associates organi=
zational units with endpoints<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">Postconditions:<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp; * Endpoint configuration has been as=
sessed [1]<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp; * Results have been conveyed to scan=
 requester<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">Primary Path:<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp; 1. At 03:46 UTC an organization's Network =
Intrusion Detection System (NIDS) sees an IP packet with a destination IPv6=
 address existing on a blacklist of known botnet command and control (C2) s=
ervers.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp; 2. The NIDS sends an alert to the SOC Anal=
yst.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp; 3. The SOC Analyst uses the information ca=
ptured in the alert (IP packet and reason for the flag) to look up the endp=
oint in the organization's asset inventory system and discovers that the en=
dpoint is a Windows Server 2008 R2 Member
 Server playing the role of a File Server<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp; 4. The SOC Analyst also verifies that the =
IPv6 address cited by the NIDS is, in fact, on the blacklist for known C2 s=
ervers.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp; 5. At this point, the SOC Analyst switches=
 over to the organization's configuration assessment tool<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp; 6. The SOC Analyst locates the offending e=
ndpoint in the configuration assessment tool's endpoint catalog [2]<o:p></o=
:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp; 7. The SOC Analyst then initiates an immed=
iate and complete endpoint assessment to determine if the endpoint has expe=
rienced any configuration drift [3].<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp; 8. The configuration assessment tool:<o:p>=
</o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp; 9. <o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp;&nbsp;a. Performs a preliminary=
 asset inventory scan on the offending endpoint, which results in a list of=
 installed software [4][5]<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; b. Performs a comparison betwe=
en the last known asset inventory and the present asset inventory and notes=
 any differences<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; c. Searches it's local content=
 repository for appropriate configuration baselines for the operating syste=
m of the offending endpoint and for each installed piece of software<o:p></=
o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; d. Upon aggregating the set of=
 applicable configuration baselines, the configuration assessment tool then=
 connects to and queries the organization's configuration content repositor=
y for newer baselines that may exist.<o:p></o:p></p>
<p class=3D"MsoPlainText">&nbsp;&nbsp;&nbsp; e. If a new baseline exists, t=
hen it is returned by the configuration content repository.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp; 10. The configuration management tool, hav=
ing the set of updated baselines, initiates a scan against the offending ho=
st, which yields a result set.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp; 11. The configuration management tool disp=
lays scan results to the SOC Analyst, which show that three new pieces of s=
oftware have been installed on the offending endpoint where one piece of so=
ftware is not on the authorized software
 list, and that several configuration items were out of compliance with the=
 organization's established baselines.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">&nbsp; 12. The SOC Analyst reviews the informatio=
n for accuracy and to plan next steps before sending the report to the resp=
onsible Information Security Officer, accountable System Owner, and the Org=
anizational Unit Leader.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">A Note On Alternative Paths, Preconditions, and P=
ostconditions:<o:p></o:p></p>
<p class=3D"MsoPlainText">There are likely to be many points of optimizatio=
n and optional paths.&nbsp; For example, a configuration assessment tool mi=
ght provide a &quot;quick glance&quot; look at the most recent scan history=
 for the offending endpoint.&nbsp; A SOC Analyst might
 then elect not to run a new scan (i.e. the offending endpoint is known to =
be out of compliance, so why run a new scan?).&nbsp; Another point might be=
 that the offending endpoint is, at present, not authorized to be on the ne=
twork, in which case it is very likely
 not to exist in the configuration assessment tool's endpoint catalog.<o:p>=
</o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">As with alternative paths, pre-/post-conditions c=
an vary widely.&nbsp; Consider that this description likely represents an o=
rganization on the mature side of managing information security.&nbsp; Many=
 organizations do not have a Security Operations
 Center, nor do they necessarily monitor their network.&nbsp; It may be the=
 case that a log management process has detected the blacklisted connection=
 attempt&nbsp; through audit trail monitoring.&nbsp; Or, it may be the case=
 that a shared indicator of compromise has been
 used to detect the offending endpoint.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">-------------------<o:p></o:p></p>
<p class=3D"MsoPlainText">[1] I am assuming at this point that &quot;config=
uration assessment&quot; has been defined and will be understood by the rea=
der.&nbsp; What I consider to be &quot;assessment&quot; is that the baselin=
e has been obtained, send to the scanning implementation, endpoint
 configuration item values have been harvested, endpoint configuration item=
 values have been compared against baseline, and results stored/forwarded a=
s appropriate for the use case.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">[2] An &quot;endpoint catalog&quot; is intended t=
o convey nothing more than the notion that configuration assessment tools a=
re likely to have some method of listing, enumerating, or aggregating endpo=
ints under configuration management.
<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">[3] It may not be necessary to specify what we me=
an by &quot;complete&quot; or the order in which scanning operations take p=
lace.&nbsp; In this particular scenario, I thought it might be useful to il=
lustrate that &quot;scan levels&quot; exist on a continuum.&nbsp;
<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">[4] Remember that the configuration assessment to=
ol has knowledge of the offending endpoint so running a preliminary invento=
ry scan is reasonable at this point.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">[5] The mechanism of scan could be agent-based or=
 remote, so details of how a scan happens are omitted here.&nbsp; A more gr=
anular partition of the process is required for further details.<o:p></o:p>=
</p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">This message and attachments may contain confiden=
tial information.&nbsp; If it appears that this message was sent to you by =
mistake, any retention, dissemination, distribution or copying of this mess=
age and attachments is strictly prohibited.&nbsp;
 Please notify the sender immediately and permanently delete the message an=
d any attachments.<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<h2>My Comments:<o:p></o:p></h2>
<p class=3D"MsoNormal">Executive Summary:<o:p></o:p></p>
<p class=3D"MsoNormal">The IETF format is what most IETF readers will expec=
t. This format has the drawback of not being formal, and is not necessarily=
 very complete. If we to derive requirements from this freehand format, it =
can be more difficult. But it is easily
 readable, so reviewers of our work can understand what we are trying to ac=
complish. Use cases of this form help to identify the nature of the stakeho=
lders involved in our WG. Operators vs vendors, service providers vs enterp=
rises, managed-device implementers
 vs management application developers, and so on. This can help to categori=
ze requirements that exist for some stakeholders but not all stakeholders.<=
o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I think the formal approach recommended in usability=
.gov would be more work for the editors to lay out the use cases in this fo=
rmal format, and the ASCII text required for RFCs makes this much harder th=
an, say Word or HTML formats.<o:p></o:p></p>
<p class=3D"MsoNormal">Usability.gov step 2 says &#8220;pick one of the use=
rs&#8221; to document as the actor. Each thing the user wants to do becomes=
 a use case, and each possible alternative action becomes a use case.<o:p><=
/o:p></p>
<p class=3D"MsoNormal">Adam&#8217;s example for Actor includes multiple rol=
es, and then describes a rather complex use case , including footnotes.<o:p=
></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Part of my concern is that we have WG contributors c=
oming from multiple vendors, with possibly multiple products, representing =
customers from multiple industry segments.<o:p></o:p></p>
<p class=3D"MsoNormal">To fully detail each possible alternative would make=
 it close to impossible to actually finish this document in a reasonable am=
ount of time.<o:p></o:p></p>
<p class=3D"MsoNormal">I suspect Adam combined a number of use cases togeth=
er in his example, to simplify things.<o:p></o:p></p>
<p class=3D"MsoNormal">However, I cannot figure out how to create English s=
entences from his example because he has multiple actors and multiple preco=
nditions and multiple postconditions, and what seems to be a lot of irrelev=
ant details in the Primary Path. Is
 the fact that this happens at 3:46 UTC an important detail in our design? =
Or is it an irrelevant detail? Or is it important for some use cases (such =
as trying to establish behavior anomalies based on when a user normally wor=
ks, or when an attack normally happens?)
 but not others? <o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I think the formal approach is over the top for our =
needs.<o:p></o:p></p>
<p class=3D"MsoNormal">The IETF approach seems more appropriate at this poi=
nt in our work process.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoPlainText">David Harrington<o:p></o:p></p>
<p class=3D"MsoPlainText"><a href=3D"mailto:dbharrington@comcast.net">dbhar=
rington@comcast.net</a><o:p></o:p></p>
<p class=3D"MsoPlainText">&#43;1-603-828-1401<o:p></o:p></p>
<p class=3D"MsoPlainText"><o:p>&nbsp;</o:p></p>
</div>
</div>
</div>
</body>
</html>

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From inacio@cert.org  Wed Jul 31 11:57:19 2013
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I think the architecture draft would be helped TREMENDOUSLY by defining som=
e terminology and using it to describe the intents of the architecture.  By=
 having everything be defined as "DF #", it isn't very descriptive.  It doe=
sn't have to be named in any form that implies using any particular solutio=
n (obviously, that would be bad) but by defining an architecture, you are e=
ffectively splitting the problem into (hopefully) manageable components wit=
h defined tasks.

Maybe splitting terminology out of the use-case doc and into a separate doc=
 so that everything can use it (and for easier reference in the future.)

Additionally, since we are the IETF, maybe we want to call the DF's protoco=
ls - it's kind of our bread and butter. :)

Second general comment, I understand the goal of the document/architecture =
being such that an we could use a passive/active separate evaluator to crea=
te information about a <host> - but I think that's hard to discern from the=
 architecture.  Second, from the architecture, it's hard to discern that th=
e goal is to evaluate a <host>.  I'm using <host>, the charter uses endpoin=
t.  Can we identify what that is - because I'm not so sure.  Does that incl=
ude a manageable network switch?  A printer?  A laptop?  What if the printe=
r runs Windows?

RFC5209 (NEA requirements) defines endpoint as:

Endpoint - Any computing device that can be connected to a network.
      Such devices normally are associated with a particular link layer
      address before joining the network and potentially an IP address
      once on the network.  This includes: laptops, desktops, servers,
      cell phones, or any device that may have an IP address.

Is that the intended scope for SACM?  (It's copied into the use cases, and =
references 5209 there, that way.)



The Controller:

The controller receives data collection tasks?  From whom, where?

In the LMAP working group, derived from the IPPM working group (mostly well=
 aligned to the broadband forum) the terminology in use is Instructions and=
 Reports.  From that paragraph, I would be, I imagine the controller as an =
intelligent MEDIATOR (stealing terminology from IPFIX) which can be inline =
to sensors and understands the sensor & evaluator infrastructure such that =
it can take complex tasks and allocate them appropriately - and then combin=
e the results?

Is that the intention?

If I turn that into reality, then I might have something like:

And passive asset/vulnerability device at the border, and IDS at the border=
, a active scanner inside the appropriate network segment, some host based =
agents able to send back configuration status, and the software configurati=
on system.  (Product wise, if it helps people, think:  passive inventory:Te=
nnable PVS, active scanner: Nmap/metasploit, host agents: McAfee ePolicy Or=
chestrator/End Point Protection, software config management: Windows AD.)

At some central console (no idea where / if that fits into the architecture=
) I send a task (n=E9e Instruction) to the Controller.  The Controller, usi=
ng something akin to a compiler, breaks the Instruction down into sub-Instr=
uctions and sends those to the passive asset/vuln detector, active vuln sca=
nner, host based config agent, and software config management system.  Pres=
umably, because this is about security, and we're not very trusting folks, =
the Controller asks as MANY as possible the same question.

Then the Controller receives the Reports, presumably it detects discrepanci=
es.

I'm nervous about what level of detail we dictate about the Controller, esp=
ecially with respect to the Data Store.  That's really an implementors choi=
ce I think.  Not that we don't acknowledge its existence, but I'm not sure =
how detailed describing the iteration with data store should be.  We need d=
escribe the Controllers function, not how it gets it done.

Can a Controller task another Controller?  Or can a Controller pretend its =
a sensor?  Is there a trust system involved?  Is the trust transitive?

Content Repository:

What are the security requirements for the Content Repository?  Everything =
accesses it, including potentially compromised endpoints.  Is that really n=
ecessary?  It seems almost as if the glueing together of the system is via =
the Content Repository.=20

I'm not really clear, what the Content Repository really is.  Is it a big O=
racle system (or Postgres, CouchDB, MonetDB, MongoDB, or =85 for anyone who=
 has their favorite DB system) with 3 extra protocols on top that aren't SQ=
L?


--
Chris Inacio
inacio@cert.org




From inacio@cert.org  Wed Jul 31 12:22:58 2013
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From: Chris Inacio <inacio@cert.org>
To: "sacm@ietf.org" <sacm@ietf.org>
Thread-Topic: comments for draft-handt-sacm-alternate-architecture-01
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I really like the concreteness of the architecture, its easy to think about=
.  But I feel like this alternative isn't complete enough.  From my comment=
s in the review of the draft-waltermire-sacm-architecture-00 architecture, =
I really feel like more than just BPD's (which I think is code for IDS/IPS)=
 should be considered to complete the situational awareness (SA) picture.

I believe that we need to include passive asset devices, active vuln scan c=
apability, and machine config management (Windows AD, Red Hat Satellite Ser=
ver, Puppet, CFEngine, MDM systems, =85).  I don't think that is covered in=
 your model.


So after we've done all of this evaluation - what are the protocols used to=
 reconfigure the network to isolate a compromised / at risk machine?  Is th=
at all NETCONF?


--
Chris Inacio
inacio@cert.org




From inacio@cert.org  Wed Jul 31 15:09:33 2013
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From: Chris Inacio <inacio@cert.org>
To: "sacm@ietf.org" <sacm@ietf.org>
Thread-Topic: comments on draft-waltermire-sacm-use-cases-05
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At a minimum we need to caveat network scanning using PING to say that with=
 an IPv6 network, that isn't a practical method.

Endpoint / Asset : we should either discuss or acknowledge virtual machines=
 (read virtual assets?) and how they should be handled here.

The ability to assess non-software vulnerabilities (section 4.4) seems very=
 challenging.

The rest of the draft had to many "todo"'s still to do more meaningful revi=
ew.


--
Chris Inacio
inacio@cert.org




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From: Stephen Hanna <shanna@juniper.net>
To: Chris Inacio <inacio@cert.org>, "sacm@ietf.org" <sacm@ietf.org>
Thread-Topic: comments on draft-waltermire-sacm-use-cases-05
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Subject: Re: [sacm] comments on draft-waltermire-sacm-use-cases-05
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Chris,

I hope you won't mind if I piggyback with a few comments
of my own on this document and on your very good comments.

> Endpoint / Asset : we should either discuss or acknowledge virtual
> machines (read virtual assets?) and how they should be handled here.

I agree. Virtual machines were intended to be included in
the RFC 5209 definition of endpoint. However, that's not
entirely clear from the text of that definition. It was
explained obliquely later in RFC 5209. I suggest that we
append the following sentence to the second paragraph in
the endpoint definition in draft-waltermire-use-cases:

Virtual devices (e.g. VM images) are also considered to
be endpoints.

> At a minimum we need to caveat network scanning using PING
> to say that with an IPv6 network, that isn't a practical method.

In my view, the use case document should not spend much
space talking about HOW the use cases can be met (e.g.
doing asset discovery through ping or by monitoring MIBs)
and instead focus on describing WHAT the use cases are,
by which I mean "what problems we're trying to solve".

We need to maintain our focus on defining the problem
and should not stray into solving the problem yet. If
you want to have side conversations on ways to solve
the problem, that's fine and good. But those ideas
should not end up in the use case document.

I realize this may result in a rather short use case
document. Don't worry. The charter calls for the use
cases to eventually be combined with the requirements
and architecture into a single document. This will
make the document plenty long enough. And short is good.

Thanks,

Steve

> -----Original Message-----
> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf Of
> Chris Inacio
> Sent: Wednesday, July 31, 2013 6:09 PM
> To: sacm@ietf.org
> Subject: [sacm] comments on draft-waltermire-sacm-use-cases-05
>=20
>=20
>=20
> At a minimum we need to caveat network scanning using PING to say that
> with an IPv6 network, that isn't a practical method.
>=20
> Endpoint / Asset : we should either discuss or acknowledge virtual
> machines (read virtual assets?) and how they should be handled here.
>=20
> The ability to assess non-software vulnerabilities (section 4.4) seems
> very challenging.
>=20
> The rest of the draft had to many "todo"'s still to do more meaningful
> review.
>=20
>=20
> --
> Chris Inacio
> inacio@cert.org
>=20
>=20
>=20
> _______________________________________________
> sacm mailing list
> sacm@ietf.org
> https://www.ietf.org/mailman/listinfo/sacm
>=20




From Adam.Montville@cisecurity.org  Wed Jul 31 22:10:58 2013
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From: Adam Montville <Adam.Montville@cisecurity.org>
To: Stephen Hanna <shanna@juniper.net>, Chris Inacio <inacio@cert.org>, "sacm@ietf.org" <sacm@ietf.org>
Thread-Topic: comments on draft-waltermire-sacm-use-cases-05
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Subject: Re: [sacm] comments on draft-waltermire-sacm-use-cases-05
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> -----Original Message-----
> From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf Of
> Stephen Hanna
> Sent: Wednesday, July 31, 2013 6:38 PM
> To: Chris Inacio; sacm@ietf.org
> Subject: Re: [sacm] comments on draft-waltermire-sacm-use-cases-05
>=20
> Chris,
>=20
> I hope you won't mind if I piggyback with a few comments of my own on th=
is
> document and on your very good comments.
>=20
> > Endpoint / Asset : we should either discuss or acknowledge virtual
> > machines (read virtual assets?) and how they should be handled here.
>=20
> I agree. Virtual machines were intended to be included in the RFC 5209
> definition of endpoint. However, that's not entirely clear from the text=
 of
> that definition. It was explained obliquely later in RFC 5209. I suggest=
 that we
> append the following sentence to the second paragraph in the endpoint
> definition in draft-waltermire-use-cases:
>=20
> Virtual devices (e.g. VM images) are also considered to be endpoints.

Is this really needed?  To me, a VM can have an IP address, and that's cov=
ered.  I guess it doesn't matter either way, but if examples start becomin=
g the spirit of the definition, then we're going to have a long list of th=
ings as technologies evolve.  Toasters?

>=20
> > At a minimum we need to caveat network scanning using PING to say that=

> > with an IPv6 network, that isn't a practical method.
>=20
> In my view, the use case document should not spend much space talking
> about HOW the use cases can be met (e.g.
> doing asset discovery through ping or by monitoring MIBs) and instead fo=
cus
> on describing WHAT the use cases are, by which I mean "what problems
> we're trying to solve".

+1, a lot. =20


>=20
> We need to maintain our focus on defining the problem and should not str=
ay
> into solving the problem yet. If you want to have side conversations on =
ways
> to solve the problem, that's fine and good. But those ideas should not e=
nd up
> in the use case document.

+1.  A bit of context for those who are reading and saying, "but, we have =
working examples today!"  We do have working examples outside the context =
of IETF, but we do not have proper use cases yet documented.  I suspect, b=
ut we will prove it out in this WG, that the requirements and architecture=
 derived from these use cases will largely match the technologies we have =
available to us today, but that we will need to step from where we are to =
a better solution over time.


>=20
> I realize this may result in a rather short use case document. Don't wor=
ry. The
> charter calls for the use cases to eventually be combined with the
> requirements and architecture into a single document. This will make the=

> document plenty long enough. And short is good.

I prefer "concise and representative is good."  Whether it's short or long=
 doesn't matter as much to me, as long as we have a body of use cases that=
 represents the problems we want to solve and are concise in their descrip=
tion.

>=20
> Thanks,
>=20
> Steve
>=20
> > -----Original Message-----
> > From: sacm-bounces@ietf.org [mailto:sacm-bounces@ietf.org] On Behalf
> > Of Chris Inacio
> > Sent: Wednesday, July 31, 2013 6:09 PM
> > To: sacm@ietf.org
> > Subject: [sacm] comments on draft-waltermire-sacm-use-cases-05
> >
> >
> >
> > At a minimum we need to caveat network scanning using PING to say that=

> > with an IPv6 network, that isn't a practical method.
> >
> > Endpoint / Asset : we should either discuss or acknowledge virtual
> > machines (read virtual assets?) and how they should be handled here.
> >
> > The ability to assess non-software vulnerabilities (section 4.4) seems=

> > very challenging.
> >
> > The rest of the draft had to many "todo"'s still to do more meaningful=

> > review.
> >
> >
> > --
> > Chris Inacio
> > inacio@cert.org
> >
> >
> >
> > _______________________________________________
> > sacm mailing list
> > sacm@ietf.org
> > https://www.ietf.org/mailman/listinfo/sacm
> >
>=20
>=20
>=20
> _______________________________________________
> sacm mailing list
> sacm@ietf.org
> https://www.ietf.org/mailman/listinfo/sacm
>=20
> ...

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