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Subject: [Teep] teep - New Meeting Session Request for IETF 109
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A new meeting session request has just been submitted by Nancy Cam-Winget, a Chair of the teep working group.


---------------------------------------------------------
Working Group Name: Trusted Execution Environment Provisioning
Area Name: Security Area
Session Requester: Nancy Cam-Winget


Number of Sessions: 1
Length of Session(s):  1 Hour
Number of Attendees: 50
Conflicts to Avoid: 
 Chair Conflict:  6man intarea  rats mile  v6ops tls add dprive

 Key Participant Conflict: oauth suit





People who must be present:
  Nancy Cam-Winget
  Tirumaleswar Reddy.K
  Benjamin Kaduk

Resources Requested:

Special Requests:
  
---------------------------------------------------------



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Subject: [Teep] I-D Action: draft-ietf-teep-otrp-over-http-08.txt
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Trusted Execution Environment Provisioning WG of the IETF.

        Title           : HTTP Transport for Trusted Execution Environment Provisioning: Agent-to- TAM Communication
        Author          : Dave Thaler
	Filename        : draft-ietf-teep-otrp-over-http-08.txt
	Pages           : 13
	Date            : 2020-10-09

Abstract:
   The Trusted Execution Environment Provisioning (TEEP) Protocol is
   used to manage code and configuration data in a Trusted Execution
   Environment (TEE).  This document specifies the HTTP transport for
   TEEP communication where a Trusted Application Manager (TAM) service
   is used to manage code and data in TEEs on devices that can initiate
   communication to the TAM.  An implementation of this document can (if
   desired) run outside of any TEE, but interacts with a TEEP
   implementation that runs inside a TEE.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-teep-otrp-over-http/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-teep-otrp-over-http-08
https://datatracker.ietf.org/doc/html/draft-ietf-teep-otrp-over-http-08

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-teep-otrp-over-http-08


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/



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From: Dave Thaler <dthaler@microsoft.com>
To: teep <teep@ietf.org>
Thread-Topic: What goes in claims vs TEEP protocol fields
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Subject: [Teep] What goes in claims vs TEEP protocol fields
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At IETF 108 I led a discussion about these, for which the minutes summarize=
:

#5 ...when have TA binary but need metadata
    Issues with passing in information
    Options
        a) attestation claims (what the doc says now)
        b) separate QueryResponse field
If no objections, Dave suggests (a), as it does not require any change to t=
he current architecture doc. (No comments in the chat or queue)

#16 List of no-longer needed TAs
    How to remove TA. Does a TAM know that there are no apps calling in to =
a TA anymore. Should we support passing a list of TA that are no longer nee=
ded since only the TAM is able to clean up no longer needed TAs. Dave propo=
ses (a) which is a change to the arch document, doing it via an attestation=
s claims.

Options to support this scenario:
        a) attestation claims
        b) separate QueryResponse field
        c) do not support

No one objected to moving forward with (a): Hannes Tschoefenig, Russ Housle=
y, Akira Tsukamoto and =1B$BBg5o=1B(B =1B$B;J=1B(B (Tsukasa Oi) indicated s=
upport.

Since there were =1B$B!H=1B(Bno comments in the chat or queue=1B$B!I=1B(B a=
s noted, the consensus was simply based on there being no
objection to my own proposal, which in turn was simply based on minimizing =
doc changes.  That decision was not based on
any real technical consideration. Now I believe there is a strong technical=
 reason to go with (b) for both, and so I am proposing
changing to (b) in both the architecture and the protocol doc.  In the arch=
 doc, this simply involves removal of text.   The
protocol doc doesn=1B$B!G=1B(Bt yet say (a) or (b) so needs changes either =
way but https://github.com/ietf-teep/teep-protocol/pull/47 proposes (b).

Rationale:
A new technical concern with (a) was raised based on the following text in =
section 8 of the arch draft:
In addition to the use of cryptographic algorithms in TEEP, there is
also the need to make use of different attestation technologies. A
device must provide techniques to inform a TAM about the attestation
technology it supports. For many deployment cases it is more likely
for the TAM to support one or more attestation techniques whereas the
device may only support one.

The concern is that:

1)     Requested components and Unneeded components are pieces of informati=
on that must be

consumed by the TAM (which is a Relying Party) rather than the Verifier, as=
 shown in the

figure above the text we=1B$B!G=1B(Bre discussing.   Claims in evidence go =
to the Verifier not the TAM per se.

2)     AThe format and content of claims can vary by attestation technique =
(serialization format or protocol),

and such agility would require the protocol to be capable of supporting mul=
tiple techniques,

so just supporting such info in EAT claims alone is insufficient.

Thus, claims should be used for fields that are important to the Verifier, =
whereas
protocol fields should be used for information that is destined for the TAM=
 and not important to the Verifier.

As such, I am generating text for both documents to change to (b) to adhere=
 to the principle above.

Please speak up if you have any objections.

Dave

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<div class=3D"WordSection1">
<p class=3D"MsoNormal">At IETF 108 I led a discussion about these, for whic=
h the minutes summarize:<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
10.0pt;font-family:&quot;Courier New&quot;;color:black">#5 ...when have TA =
binary but need metadata<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
10.0pt;font-family:&quot;Courier New&quot;;color:black">&nbsp; &nbsp; Issue=
s with passing in information<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
10.0pt;font-family:&quot;Courier New&quot;;color:black">&nbsp; &nbsp; Optio=
ns<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
10.0pt;font-family:&quot;Courier New&quot;;color:black">&nbsp; &nbsp; &nbsp=
; &nbsp; a) attestation claims (what the doc says now)<o:p></o:p></span></p=
>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
10.0pt;font-family:&quot;Courier New&quot;;color:black">&nbsp; &nbsp; &nbsp=
; &nbsp; b) separate QueryResponse field<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
10.0pt;font-family:&quot;Courier New&quot;;color:black">If no objections, D=
ave suggests (a), as it does not require any change to the current architec=
ture doc. (No comments in the chat or queue)<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
10.0pt;font-family:&quot;Courier New&quot;;color:black"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
10.0pt;font-family:&quot;Courier New&quot;;color:black">#16 List of no-long=
er needed TAs<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
10.0pt;font-family:&quot;Courier New&quot;;color:black">&nbsp; &nbsp; How t=
o remove TA. Does a TAM know that there are no apps calling in to a TA anym=
ore. Should we support passing a list of TA that are no longer
 needed since only the TAM is able to clean up no longer needed TAs. Dave p=
roposes (a) which is a change to the arch document, doing it via an attesta=
tions claims.&nbsp;<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
10.0pt;font-family:&quot;Courier New&quot;;color:black"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
10.0pt;font-family:&quot;Courier New&quot;;color:black">Options to support =
this scenario:<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
10.0pt;font-family:&quot;Courier New&quot;;color:black">&nbsp; &nbsp; &nbsp=
; &nbsp; a) attestation claims<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
10.0pt;font-family:&quot;Courier New&quot;;color:black">&nbsp; &nbsp; &nbsp=
; &nbsp; b) separate QueryResponse field<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
10.0pt;font-family:&quot;Courier New&quot;;color:black">&nbsp; &nbsp; &nbsp=
; &nbsp; c) do not support<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
10.0pt;font-family:&quot;Courier New&quot;;color:black"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
10.0pt;font-family:&quot;Courier New&quot;;color:black">No one objected to =
moving forward with (a): Hannes Tschoefenig, Russ Housley, Akira Tsukamoto =
and
</span><span style=3D"font-size:10.0pt;font-family:&quot;MS Gothic&quot;;co=
lor:black">=1B$BBg5o=1B(B</span><span style=3D"font-size:10.0pt;font-family=
:&quot;Courier New&quot;;color:black">
</span><span style=3D"font-size:10.0pt;font-family:&quot;MS Gothic&quot;;co=
lor:black">=1B$B;J=1B(B</span><span style=3D"font-size:10.0pt;font-family:&=
quot;Courier New&quot;;color:black"> (Tsukasa Oi) indicated support.<o:p></=
o:p></span></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"color:#24292E;background:white">Since=
 there were =1B$B!H=1B(Bno comments in the chat or queue=1B$B!I=1B(B as not=
ed, the consensus was simply based on there being no<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#24292E;background:white">objec=
tion to my own proposal, which in turn was simply based on minimizing doc c=
hanges.&nbsp; That decision was not based on<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#24292E;background:white">any r=
eal technical consideration. Now I believe there is a strong technical reas=
on to go with (b) for both, and so I am proposing<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#24292E;background:white">chang=
ing to (b) in both the architecture and the protocol doc.&nbsp; In the arch=
 doc, this simply involves removal of text.&nbsp;&nbsp; The<o:p></o:p></spa=
n></p>
<p class=3D"MsoNormal"><span style=3D"color:#24292E;background:white">proto=
col doc doesn=1B$B!G=1B(Bt yet say (a) or (b) so needs changes either way b=
ut
<a href=3D"https://github.com/ietf-teep/teep-protocol/pull/47">https://gith=
ub.com/ietf-teep/teep-protocol/pull/47</a> proposes (b).<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"color:#24292E;background:white"><o:p>=
&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#24292E;background:white">Ratio=
nale:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:#24292E;background:white">A new=
 technical concern with (a) was raised based on the following text in secti=
on 8 of the arch draft:<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.5in"><span style=3D"font-size:=
10.5pt;font-family:Consolas;color:#6A737D;background:white">In addition to =
the use of cryptographic algorithms in TEEP, there is</span><span style=3D"=
font-size:10.5pt;font-family:Consolas;color:#6A737D"><br>
<span style=3D"background:white">also the need to make use of different att=
estation technologies. A</span><br>
<span style=3D"background:white">device must provide techniques to inform a=
 TAM about the attestation</span><br>
<span style=3D"background:white">technology it supports. For many deploymen=
t cases it is more likely</span><br>
<span style=3D"background:white">for the TAM to support one or more attesta=
tion techniques whereas the</span><br>
<span style=3D"background:white">device may only support one.</span></span>=
<span style=3D"font-family:Consolas;color:#24292E;background:white"><o:p></=
o:p></span></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">The concern is that:<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo1"><![if !supportLists]><span style=3D"mso-list:Ignore">1)<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;
</span></span><![endif]>Requested components and Unneeded components are pi=
eces of information that must be<o:p></o:p></p>
<p class=3D"MsoListParagraph">consumed by the TAM (which is a Relying Party=
) rather than the Verifier, as shown in the<o:p></o:p></p>
<p class=3D"MsoListParagraph">figure above the text we=1B$B!G=1B(Bre discus=
sing.&nbsp;&nbsp; Claims in evidence go to the Verifier not the TAM per se.=
<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo1"><![if !supportLists]><span style=3D"mso-list:Ignore">2)<span style=
=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;&nbsp;&nbsp;&nbsp;
</span></span><![endif]>AThe format and content of claims can vary by attes=
tation technique (serialization format or protocol),<o:p></o:p></p>
<p class=3D"MsoListParagraph">and such agility would require the protocol t=
o be capable of supporting multiple techniques,<o:p></o:p></p>
<p class=3D"MsoListParagraph">so just supporting such info in EAT claims al=
one is insufficient.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Thus, <i>claims should be used for fields that are i=
mportant to the Verifier, whereas<o:p></o:p></i></p>
<p class=3D"MsoNormal"><i>protocol fields should be used for information th=
at is destined for the TAM and not important to the Verifier.<o:p></o:p></i=
></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">As such, I am generating text for both documents to =
change to (b) to adhere to the principle above.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Please speak up if you have any objections.<o:p></o:=
p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Dave<o:p></o:p></p>
</div>
</body>
</html>

--_000_BL0PR2101MB1027B60274595C0D7C63AA4EA3030BL0PR2101MB1027_--


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Subject: [Teep] Constrained Node/Network Cluster @ IETF109: DRAFT AGENDA
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Here is my usual eclectic condensed agenda based on the DRAFT AGENDA
for IETF109.  Remember that there is still quite some potential for
changes.

The conflicts that meet the eye this time seem to impact generalists =
only.
Great scheduling job!

All times *on my agenda* are in UTC (the default page is UTC+0700).
https://datatracker.ietf.org/meeting/agenda-utc might be handy.
Note that both EU and US are on winter time (standard time) then.

Gr=C3=BC=C3=9Fe, Carsten

MONDAY, November 9, 2020

0500-0700  Hackathon Kickoff
Rm 1    	GEN	hackathon	Hackathon

FRIDAY, November 13, 2020

0500-0700  Hackathon Closing
Rm 1    	GEN	hackathon	Hackathon

MONDAY, November 16, 2020

0500-0700  Session I
Rm 1    	ART	dispatch	Dispatch WG - Joint with ARTAREA
Rm 3    	IRTF	qirg	Quantum Internet Research Group
Rm 5    	RTG	raw	Reliable and Available Wireless WG
Rm 6    	SEC ***	lake	Lightweight Authenticated Key Exchange =
WG

0730-0830  Session II
Rm 3    	INT	add	Adaptive DNS Discovery WG
Rm 4    	IRTF	maprg	Measurement and Analysis for Protocols
Rm 7    	SEC ***	cose	CBOR Object Signing and Encryption WG

0900-1100  Session III
Rm 1    	ART	jsonpath	JSON Path WG
Rm 6    	SEC	secdispatch	Security Dispatch WG
Rm 7    	TSV	tsvwg	Transport Area Working Group WG

TUESDAY, November 17, 2020

0500-0700  Session I
Rm 1    	ART ***	core	Constrained RESTful Environments WG
Rm 2    	INT	6man	IPv6 Maintenance WG
Rm 7    	SEC	gnap	Grant Negotiation and Authorization =
Protocol WG

0730-0830  Session II
Rm 5    	RTG	babel	Babel routing protocol WG
Rm 6    	SEC	tls	Transport Layer Security WG

0900-1100  Session III
Rm 1    	ART ***	asdf	A Semantic Definition Format for Data =
and Interactions of Things WG
Rm 2    	IRTF	irtfopen	IRTF Open Meeting
Rm 4    	RTG	apn	Application-aware Networking BOF
Rm 7    	SEC ***	rats	Remote ATtestation ProcedureS WG

WEDNESDAY, November 18, 2020

0500-0700  Session I
Rm 3    	INT	madinas	MAC Address Device Identification for =
Network and Application Services BOF
Rm 5    	RTG	bier	Bit Indexed Explicit Replication WG
Rm 7    	SEC ***	ace	Authentication and Authorization for =
Constrained Environments WG
Rm 8    	TSV	quic	QUIC WG

0730-0830  Session II
Rm 3    	INT ***	6lo	IPv6 over Networks of =
Resource-constrained Nodes WG
Rm 4    	INT ***	drip	Drone Remote ID Protocol WG
Rm 7    	SEC ***	teep	Trusted Execution Environment =
Provisioning WG
Rm 8    	TSV	tsvwg	Transport Area Working Group WG

THURSDAY, November 19, 2020

0500-0700  Session I
Rm 3    	IRTF	coinrg	Computing in the Network Research Group
Rm 7    	SEC	saag	Security Area Open Meeting

0730-0830  Session II
Rm 1    	ART ***	cbor	Concise Binary Object Representation =
Maintenance and Extensions WG
Rm 2    	INT	intarea	Internet Area Working Group WG
Rm 3    	RTG	detnet	Deterministic Networking WG
Rm 5    	SEC	acme	Automated Certificate Management =
Environment WG

0900-1100  Session III
Rm 4    	OPS	v6ops	IPv6 Operations WG
Rm 6    	RTG ***	roll	Routing Over Low power and Lossy =
networks WG
Rm 7    	SEC	mls	Messaging Layer Security WG
Rm 8    	SEC ***	rats	Remote ATtestation ProcedureS WG

FRIDAY, November 20, 2020

0500-0700  Session I
Rm 2    	INT	add	Adaptive DNS Discovery WG
Rm 6    	RTG	rift	Routing In Fat Trees WG
Rm 7    	SEC	emu	EAP Method Update WG

0730-0830  Session II
Rm 1    	ART	httpapi	Building Blocks for HTTP APIs WG
Rm 2    	INT ***	lwig	Light-Weight Implementation Guidance WG
Rm 3    	OPS	anima	Autonomic Networking Integrated Model =
and Approach WG
Rm 6    	SEC ***	suit	Software Updates for Internet of Things =
WG
Rm 7    	TSV	tsvarea	Transport Area Open Meeting

0900-1100  Session III
Rm 1    	ART ***	core	Constrained RESTful Environments WG
Rm 2    	INT	6man	IPv6 Maintenance WG
Rm 4    	IRTF	cfrg	Crypto Forum
Rm 7    	TSV	masque	Multiplexed Application Substrate over =
QUIC Encryption WG



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Subject: [Teep] teep - Requested session has been scheduled for IETF 109
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Dear Nancy Cam-Winget,

The session(s) that you have requested have been scheduled.
Below is the scheduled session information followed by
the original request. 


    teep Session 1 (1:00 requested)
    Wednesday, 18 November 2020, Session II 1430-1530
    Room Name: Room 7 size: 507
    ---------------------------------------------


iCalendar: https://datatracker.ietf.org/meeting/109/sessions/teep.ics

Request Information:


---------------------------------------------------------
Working Group Name: Trusted Execution Environment Provisioning
Area Name: Security Area
Session Requester: Nancy Cam-Winget


Number of Sessions: 1
Length of Session(s):  1 Hour
Number of Attendees: 50
Conflicts to Avoid: 
 Chair Conflict: 6man intarea rats mile v6ops tls add dprive

 Key Participant Conflict: oauth suit





People who must be present:
  Nancy Cam-Winget
  Tirumaleswar Reddy.K
  Benjamin Kaduk

Resources Requested:

Special Requests:
  
---------------------------------------------------------



From nobody Fri Oct 23 15:12:35 2020
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From: Carsten Bormann <cabo@tzi.org>
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Subject: [Teep] [Cbor] Constrained Node/Network Cluster @ IETF109: "FINAL" AGENDA
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Here is my usual eclectic condensed agenda based on the "FINAL" AGENDA
for IETF109.  Remember that further agenda changes can still happen.

Very little has changed with respect to the draft agenda.  WEBTRANS
does meet, and CFRG and IRTFOPEN have been moved around (CFRG now on
top of CORE, unfortunately).

All times *on my agenda* are in UTC (the default page is UTC+0700).
https://datatracker.ietf.org/meeting/agenda-utc might be handy.
Note that both EU and US are on winter time (standard time) then.

Gr=C3=BC=C3=9Fe, Carsten


MONDAY, November 9, 2020

0500-0700  Hackathon Kickoff
Rm 1 	GEN	hackathon	Hackathon

FRIDAY, November 13, 2020

0500-0700  Hackathon Closing
Rm 1 	GEN	hackathon	Hackathon

MONDAY, November 16, 2020

0500-0700  Session I
Rm 1 	ART	dispatch	Dispatch WG - Joint with ARTAREA
Rm 3 	IRTF	qirg	Quantum Internet Research Group
Rm 5 	RTG	raw	Reliable and Available Wireless WG
Rm 6 	SEC ***	lake	Lightweight Authenticated Key Exchange WG

0730-0830  Session II
Rm 2 	INT	add	Adaptive DNS Discovery WG
Rm 3 	IRTF	maprg	Measurement and Analysis for Protocols
Rm 6 	SEC ***	cose	CBOR Object Signing and Encryption WG

0900-1100  Session III
Rm 1 	ART	jsonpath	JSON Path WG
Rm 2 	ART	webtrans	WebTransport WG
Rm 7 	SEC	secdispatch	Security Dispatch WG
Rm 8 	TSV	tsvwg	Transport Area Working Group WG

TUESDAY, November 17, 2020

0500-0700  Session I
Rm 1 	ART ***	core	Constrained RESTful Environments WG
Rm 2 	INT	6man	IPv6 Maintenance WG
Rm 3 	IRTF	cfrg	Crypto Forum
Rm 7 	SEC	gnap	Grant Negotiation and Authorization Protocol WG

0730-0830  Session II
Rm 5 	RTG	babel	Babel routing protocol WG
Rm 6 	SEC	tls	Transport Layer Security WG

0900-1100  Session III
Rm 1 	ART ***	asdf	A Semantic Definition Format for Data and =
Interactions of Things WG
Rm 5 	RTG	apn	Application-aware Networking BOF
Rm 8 	SEC ***	rats	Remote ATtestation ProcedureS WG

WEDNESDAY, November 18, 2020

0500-0700  Session I
Rm 3 	INT	madinas	MAC Address Device Identification for Network =
and Application Services BOF
Rm 5 	RTG	bier	Bit Indexed Explicit Replication WG
Rm 7 	SEC ***	ace	Authentication and Authorization for Constrained =
Environments WG
Rm 8 	TSV	quic	QUIC WG

0730-0830  Session II
Rm 3 	INT ***	6lo	IPv6 over Networks of Resource-constrained Nodes =
WG
Rm 4 	INT ***	drip	Drone Remote ID Protocol WG
Rm 7 	SEC ***	teep	Trusted Execution Environment Provisioning WG
Rm 8 	TSV	tsvwg	Transport Area Working Group WG

THURSDAY, November 19, 2020

0500-0700  Session I
Rm 3 	IRTF	coinrg	Computing in the Network Research Group
Rm 7 	SEC	saag	Security Area Open Meeting

0730-0830  Session II
Rm 1 	ART ***	cbor	Concise Binary Object Representation Maintenance =
and Extensions WG
Rm 2 	INT	intarea	Internet Area Working Group WG
Rm 3 	RTG	detnet	Deterministic Networking WG
Rm 5 	SEC	acme	Automated Certificate Management Environment WG

0900-1100  Session III
Rm 4 	OPS	v6ops	IPv6 Operations WG
Rm 6 	RTG ***	roll	Routing Over Low power and Lossy networks WG
Rm 7 	SEC	mls	Messaging Layer Security WG
Rm 8 	SEC ***	rats	Remote ATtestation ProcedureS WG

FRIDAY, November 20, 2020

0500-0700  Session I
Rm 2 	INT	add	Adaptive DNS Discovery WG
Rm 6 	RTG	rift	Routing In Fat Trees WG
Rm 7 	SEC	emu	EAP Method Update WG

0730-0830  Session II
Rm 1 	ART	httpapi	Building Blocks for HTTP APIs WG
Rm 2 	INT ***	lwig	Light-Weight Implementation Guidance WG
Rm 3 	OPS	anima	Autonomic Networking Integrated Model and =
Approach WG
Rm 6 	SEC ***	suit	Software Updates for Internet of Things WG
Rm 7 	TSV	tsvarea	Transport Area Open Meeting

0900-1100  Session III
Rm 1 	ART ***	core	Constrained RESTful Environments WG
Rm 3 	INT	6man	IPv6 Maintenance WG
Rm 5 	IRTF	irtfopen	IRTF Open Meeting
Rm 8 	TSV	masque	Multiplexed Application Substrate over QUIC =
Encryption WG

_______________________________________________
CBOR mailing list
CBOR@ietf.org
https://www.ietf.org/mailman/listinfo/cbor


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From: Dave Thaler <dthaler@microsoft.com>
To: "rats@ietf.org" <rats@ietf.org>
CC: teep <teep@ietf.org>
Thread-Topic: EAT claims needed by TEEP
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Subject: [Teep] EAT claims needed by TEEP
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As discussed in previous IETF meetings, if there are claims beyond the base=
 set that
other WGs need, they can be specified by the other WGs with review by RATS.

The TEEP WG needs the following in EATs and I am not sure whether they can =
be
covered by existing claims or whether TEEP-specific claims are needed.  Fro=
m
section 7.1 of draft-ietf-teep-architecture:


=D8     -  Device Identifying Information: TEEP attestations may need to

=D8        uniquely identify a device to the TAM.  Unique device

=D8        identification allows the TAM to provide services to the device,

=D8        such as managing installed TAs, and providing subscriptions to

=D8        services, and locating device-specific keying material to

=D8        communicate with or authenticate the device.

I believe the Universal Entity ID Claim (ueid) is claim that meets the abov=
e requirement.
But the TEEP arch then goes on to say:


=D8        In some use cases it

=D8        may be sufficient to identify only the class of the device.  The

=D8        security and privacy requirements regarding device identificatio=
n

=D8        will vary with the type of TA provisioned to the TEE.
Which EAT claim contains the device class? The closest thing I see is OEM I=
dentification by IEEE (oemid)
but I am not sure that is sufficient since it's only the OEM not the device=
 class from that OEM.
This doesn't seem like something that should be TEEP specific though, so ca=
n someone tell me how to
represent device class using the claims in the EAT spec?

=D8     -  TEE Identifying Information: The type of TEE that generated this

=D8        attestation must be identified, including version identification

=D8        information such as the hardware, firmware, and software version

=D8        of the TEE, as applicable by the TEE type.  TEE manufacturer

=D8        information for the TEE is required in order to disambiguate the

=D8        same TEE type created by different manufacturers and address

=D8        considerations around manufacturer provisioning, keying and

=D8        support for the TEE.


Similarly for this requirement, the closest thing I see is Origination Clai=
m (origination) but I am not sure
that is sufficient since it's just the manufacturer not the "version identi=
fication information such as the
hardware, firmware, and software version of the TEE"
Should the TEEP WG define TEEP-specific claims for such information?

Dave

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<body lang=3D"EN-US" link=3D"#0563C1" vlink=3D"#954F72">
<div class=3D"WordSection1">
<p class=3D"MsoNormal">As discussed in previous IETF meetings, if there are=
 claims beyond the base set that<br>
other WGs need, they can be specified by the other WGs with review by RATS.=
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">The TEEP WG needs the following in EATs and I am not=
 sure whether they can be<o:p></o:p></p>
<p class=3D"MsoNormal">covered by existing claims or whether TEEP-specific =
claims are needed.&nbsp; From<o:p></o:p></p>
<p class=3D"MsoNormal">section 7.1 of draft-ietf-teep-architecture:<o:p></o=
:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l1 level=
1 lfo2"><![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Wi=
ngdings;color:black"><span style=3D"mso-list:Ignore">=D8<span style=3D"font=
:7.0pt &quot;Times New Roman&quot;">&nbsp;
</span></span></span><![endif]><span style=3D"font-size:10.0pt;font-family:=
&quot;Courier New&quot;;color:black">&nbsp;&nbsp;&nbsp;-&nbsp; Device Ident=
ifying Information: TEEP attestations may need to<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l1 level=
1 lfo2"><![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Wi=
ngdings;color:black"><span style=3D"mso-list:Ignore">=D8<span style=3D"font=
:7.0pt &quot;Times New Roman&quot;">&nbsp;
</span></span></span><![endif]><span style=3D"font-size:10.0pt;font-family:=
&quot;Courier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;un=
iquely identify a device to the TAM.&nbsp; Unique device<o:p></o:p></span><=
/p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l1 level=
1 lfo2"><![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Wi=
ngdings;color:black"><span style=3D"mso-list:Ignore">=D8<span style=3D"font=
:7.0pt &quot;Times New Roman&quot;">&nbsp;
</span></span></span><![endif]><span style=3D"font-size:10.0pt;font-family:=
&quot;Courier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;id=
entification allows the TAM to provide services to the device,<o:p></o:p></=
span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l1 level=
1 lfo2"><![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Wi=
ngdings;color:black"><span style=3D"mso-list:Ignore">=D8<span style=3D"font=
:7.0pt &quot;Times New Roman&quot;">&nbsp;
</span></span></span><![endif]><span style=3D"font-size:10.0pt;font-family:=
&quot;Courier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;su=
ch as managing installed TAs, and providing subscriptions to<o:p></o:p></sp=
an></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l1 level=
1 lfo2"><![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Wi=
ngdings;color:black"><span style=3D"mso-list:Ignore">=D8<span style=3D"font=
:7.0pt &quot;Times New Roman&quot;">&nbsp;
</span></span></span><![endif]><span style=3D"font-size:10.0pt;font-family:=
&quot;Courier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;se=
rvices, and locating device-specific keying material to<o:p></o:p></span></=
p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l1 level=
1 lfo2"><![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Wi=
ngdings;color:black"><span style=3D"mso-list:Ignore">=D8<span style=3D"font=
:7.0pt &quot;Times New Roman&quot;">&nbsp;
</span></span></span><![endif]><span style=3D"font-size:10.0pt;font-family:=
&quot;Courier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;co=
mmunicate with or authenticate the device.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.0pt;font-family:&quot;Co=
urier New&quot;;color:black"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;font-family:&quot;Se=
goe UI&quot;,sans-serif;color:#24292E">I believe the Universal Entity ID Cl=
aim (ueid) is claim that meets the above requirement.<br>
But the TEEP arch then goes on to say:</span><span style=3D"font-size:10.0p=
t;font-family:&quot;Courier New&quot;;color:black"><o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:.25in"><span style=3D"font-size=
:10.0pt;font-family:&quot;Courier New&quot;;color:black"><o:p>&nbsp;</o:p><=
/span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l1 level=
1 lfo2"><![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Wi=
ngdings;color:black"><span style=3D"mso-list:Ignore">=D8<span style=3D"font=
:7.0pt &quot;Times New Roman&quot;">&nbsp;
</span></span></span><![endif]><span style=3D"font-size:10.0pt;font-family:=
&quot;Courier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;In=
 some use cases it<o:p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l1 level=
1 lfo2"><![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Wi=
ngdings;color:black"><span style=3D"mso-list:Ignore">=D8<span style=3D"font=
:7.0pt &quot;Times New Roman&quot;">&nbsp;
</span></span></span><![endif]><span style=3D"font-size:10.0pt;font-family:=
&quot;Courier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ma=
y be sufficient to identify only the class of the device.&nbsp; The<o:p></o=
:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l1 level=
1 lfo2"><![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Wi=
ngdings;color:black"><span style=3D"mso-list:Ignore">=D8<span style=3D"font=
:7.0pt &quot;Times New Roman&quot;">&nbsp;
</span></span></span><![endif]><span style=3D"font-size:10.0pt;font-family:=
&quot;Courier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;se=
curity and privacy requirements regarding device identification<o:p></o:p><=
/span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l1 level=
1 lfo2"><![if !supportLists]><span style=3D"font-size:10.0pt;font-family:Wi=
ngdings;color:black"><span style=3D"mso-list:Ignore">=D8<span style=3D"font=
:7.0pt &quot;Times New Roman&quot;">&nbsp;
</span></span></span><![endif]><span style=3D"font-size:10.0pt;font-family:=
&quot;Courier New&quot;;color:black">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;wi=
ll vary with the type of TA provisioned to the TEE.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;background:white">
<span style=3D"font-size:10.5pt;font-family:&quot;Segoe UI&quot;,sans-serif=
;color:#24292E">Which EAT claim contains the device class? The closest thin=
g I see is OEM Identification by IEEE (oemid)<br>
but I am not sure that is sufficient since it's only the OEM not the device=
 class from that OEM.<o:p></o:p></span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt:auto;mso-margin-bottom-a=
lt:auto;background:white">
<span style=3D"font-size:10.5pt;font-family:&quot;Segoe UI&quot;,sans-serif=
;color:#24292E">This doesn&#8217;t seem like something that should be TEEP =
specific though, so can someone tell me how to<br>
represent device class using the claims in the EAT spec?<o:p></o:p></span><=
/p>
<pre style=3D"margin-left:.5in;text-indent:-.25in;mso-list:l1 level1 lfo2">=
<![if !supportLists]><span style=3D"font-family:Wingdings;color:black"><spa=
n style=3D"mso-list:Ignore">=D8<span style=3D"font:7.0pt &quot;Times New Ro=
man&quot;">&nbsp; </span></span></span><![endif]><span style=3D"color:black=
">&nbsp;&nbsp;&nbsp;-&nbsp; TEE Identifying Information: The type of TEE th=
at generated this<o:p></o:p></span></pre>
<pre style=3D"margin-left:.5in;text-indent:-.25in;mso-list:l1 level1 lfo2">=
<![if !supportLists]><span style=3D"font-family:Wingdings;color:black"><spa=
n style=3D"mso-list:Ignore">=D8<span style=3D"font:7.0pt &quot;Times New Ro=
man&quot;">&nbsp; </span></span></span><![endif]><span style=3D"color:black=
">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;attestation must be identified, inclu=
ding version identification<o:p></o:p></span></pre>
<pre style=3D"margin-left:.5in;text-indent:-.25in;mso-list:l1 level1 lfo2">=
<![if !supportLists]><span style=3D"font-family:Wingdings;color:black"><spa=
n style=3D"mso-list:Ignore">=D8<span style=3D"font:7.0pt &quot;Times New Ro=
man&quot;">&nbsp; </span></span></span><![endif]><span style=3D"color:black=
">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;information such as the hardware, fir=
mware, and software version<o:p></o:p></span></pre>
<pre style=3D"margin-left:.5in;text-indent:-.25in;mso-list:l1 level1 lfo2">=
<![if !supportLists]><span style=3D"font-family:Wingdings;color:black"><spa=
n style=3D"mso-list:Ignore">=D8<span style=3D"font:7.0pt &quot;Times New Ro=
man&quot;">&nbsp; </span></span></span><![endif]><span style=3D"color:black=
">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;of the TEE, as applicable by the TEE =
type.&nbsp; TEE manufacturer<o:p></o:p></span></pre>
<pre style=3D"margin-left:.5in;text-indent:-.25in;mso-list:l1 level1 lfo2">=
<![if !supportLists]><span style=3D"font-family:Wingdings;color:black"><spa=
n style=3D"mso-list:Ignore">=D8<span style=3D"font:7.0pt &quot;Times New Ro=
man&quot;">&nbsp; </span></span></span><![endif]><span style=3D"color:black=
">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;information for the TEE is required i=
n order to disambiguate the<o:p></o:p></span></pre>
<pre style=3D"margin-left:.5in;text-indent:-.25in;mso-list:l1 level1 lfo2">=
<![if !supportLists]><span style=3D"font-family:Wingdings;color:black"><spa=
n style=3D"mso-list:Ignore">=D8<span style=3D"font:7.0pt &quot;Times New Ro=
man&quot;">&nbsp; </span></span></span><![endif]><span style=3D"color:black=
">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;same TEE type created by different ma=
nufacturers and address<o:p></o:p></span></pre>
<pre style=3D"margin-left:.5in;text-indent:-.25in;mso-list:l1 level1 lfo2">=
<![if !supportLists]><span style=3D"font-family:Wingdings;color:black"><spa=
n style=3D"mso-list:Ignore">=D8<span style=3D"font:7.0pt &quot;Times New Ro=
man&quot;">&nbsp; </span></span></span><![endif]><span style=3D"color:black=
">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;considerations around manufacturer pr=
ovisioning, keying and<o:p></o:p></span></pre>
<pre style=3D"margin-left:.5in;text-indent:-.25in;mso-list:l1 level1 lfo2">=
<![if !supportLists]><span style=3D"font-family:Wingdings;color:black"><spa=
n style=3D"mso-list:Ignore">=D8<span style=3D"font:7.0pt &quot;Times New Ro=
man&quot;">&nbsp; </span></span></span><![endif]><span style=3D"color:black=
">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;support for the TEE.<o:p></o:p></span=
></pre>
<pre style=3D"margin-left:.5in"><span style=3D"color:black"><o:p>&nbsp;</o:=
p></span></pre>
<p class=3D"MsoNormal" style=3D"margin-top:3.0pt;mso-margin-bottom-alt:auto=
;background:white">
<span style=3D"font-size:10.5pt;font-family:&quot;Segoe UI&quot;,sans-serif=
;color:#24292E">Similarly for this requirement, the closest thing I see is =
Origination Claim (origination) but I am not sure<br>
that is sufficient since it's just the manufacturer not the &quot;version i=
dentification information such as the<br>
hardware, firmware, and software version of the TEE&quot;<o:p></o:p></span>=
</p>
<p class=3D"MsoNormal">Should the TEEP WG define TEEP-specific claims for s=
uch information?<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Dave<o:p></o:p></p>
</div>
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From: Dave Thaler <dthaler@microsoft.com>
To: teep <teep@ietf.org>
Thread-Topic: Trusted Applications vs Trusted Components
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Archived-At: <https://mailarchive.ietf.org/arch/msg/teep/J-gjq6J_0GkfNcgCu-DcxIwTCU8>
Subject: [Teep] Trusted Applications vs Trusted Components
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Section 4 of draft-ietf-teep-architecture explains that personalization dat=
a can
be a separate package that a TA depends on (not bundled with the TA), and
goes on to say:

=D8  The TEEP protocol treats each TA, any dependencies the TA has, and

=D8  personalization data as separate components with separate

=D8  installation steps that are expressed in SUIT manifests, and a SUIT

=D8  manifest might contain or reference multiple binaries (see

=D8  [I-D.ietf-suit-manifest] for more details).
Thus, the TEEP protocol can install anything representable by a SUIT manife=
st,
whether the binaries represent code or personalization data, or both.

Recall that a TA is defined as:

=D8  - Trusted Application (TA): An application (or, in some implementation=
s,

=D8   an application component) that runs in a TEE.
Thus the "that runs" means a TA is specifically code, not something that mi=
ght
refer to a SUIT manifest containing only personalization data.

Elsewhere in the arch doc it talked about the TAM installing "Trusted Appli=
cations", such as

=D8  A TA Signer selects one or more TAMs and communicates the TA(s) to the=
 TAM.
for example (plenty of other places too), except that such statements shoul=
d also apply
to personalization data expressed via their own manifest, but the term "TA"=
 implies the
relevant text is limited to things containing code.

The term "trusted components" does appear in the doc in a way that refers t=
o
TAs and/or personalization data, such as in this sentence:

=D8  When the TEEP Agent subsequently receives the TA to install and the TA=
's manifest

=D8  indicates dependencies on any other trusted components, each dependenc=
y can include

=D8  a list of TAM URIs for the relevant dependency.

As a document editor, I would like to make "Trusted Components" a term defi=
ned in the
terminology section as referring to TAs and/or Personalization Data, and fi=
x text
that says TA that should instead say Trusted Components more generally.

In theory an alternative approach would be to redefined TAs to not just be =
code but to also include
only data.  But that would seem to go against the normal human expectation =
that "app" means
something that has code (and maybe data too, but not data-only).

https://github.com/ietf-teep/architecture/pull/212/files shows proposed dif=
fs if we go ahead
and make the change to use Trusted Components as a more formal term, just l=
ike TA is.

Please speak up if you have strong opinions on this editorial change.  I wo=
uld like to make
a decision one way or the other before the I-D deadline.

Dave


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<div class=3D"WordSection1">
<p class=3D"MsoNormal">Section 4 of draft-ietf-teep-architecture explains t=
hat personalization data can<br>
be a separate package that a TA depends on (not bundled with the TA), and<b=
r>
goes on to say:<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo1"><![if !supportLists]><span style=3D"font-size:10.5pt;font-family:Wi=
ngdings;color:#6A737D"><span style=3D"mso-list:Ignore">=D8<span style=3D"fo=
nt:7.0pt &quot;Times New Roman&quot;">&nbsp;
</span></span></span><![endif]><span style=3D"background:white">The TEEP pr=
otocol treats each TA, any dependencies the TA has, and</span><o:p></o:p></=
p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo1"><![if !supportLists]><span style=3D"font-size:10.5pt;font-family:Wi=
ngdings;color:#6A737D"><span style=3D"mso-list:Ignore">=D8<span style=3D"fo=
nt:7.0pt &quot;Times New Roman&quot;">&nbsp;
</span></span></span><![endif]><span style=3D"background:white">personaliza=
tion data as separate components with separate</span><o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo1"><![if !supportLists]><span style=3D"font-size:10.5pt;font-family:Wi=
ngdings;color:#6A737D"><span style=3D"mso-list:Ignore">=D8<span style=3D"fo=
nt:7.0pt &quot;Times New Roman&quot;">&nbsp;
</span></span></span><![endif]><span style=3D"background:white">installatio=
n steps that are expressed in SUIT manifests, and a SUIT</span><o:p></o:p><=
/p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo1"><![if !supportLists]><span style=3D"font-size:10.5pt;font-family:Wi=
ngdings;color:#6A737D"><span style=3D"mso-list:Ignore">=D8<span style=3D"fo=
nt:7.0pt &quot;Times New Roman&quot;">&nbsp;
</span></span></span><![endif]><span style=3D"background:white">manifest mi=
ght contain or reference multiple binaries (see</span><o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo1"><![if !supportLists]><span style=3D"font-size:10.5pt;font-family:Wi=
ngdings;color:#6A737D"><span style=3D"mso-list:Ignore">=D8<span style=3D"fo=
nt:7.0pt &quot;Times New Roman&quot;">&nbsp;
</span></span></span><![endif]><span style=3D"background:white">[I-D.ietf-s=
uit-manifest] for more details).</span><o:p></o:p></p>
<p class=3D"MsoNormal">Thus, the TEEP protocol can install anything represe=
ntable by a SUIT manifest,<o:p></o:p></p>
<p class=3D"MsoNormal">whether the binaries represent code or personalizati=
on data, or both.&nbsp;
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Recall that a TA is defined as:<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo1"><![if !supportLists]><span class=3D"pl-s"><span style=3D"font-size:=
10.5pt;font-family:Wingdings;color:#6A737D"><span style=3D"mso-list:Ignore"=
>=D8<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;
</span></span></span></span><![endif]><span style=3D"background:#FAFBFC">- =
</span><span class=3D"pl-ent">Trusted Application (TA)</span><span style=3D=
"background:#FAFBFC">:
</span><span class=3D"pl-s">An application (or, in some implementations,<o:=
p></o:p></span></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo1"><![if !supportLists]><span class=3D"pl-s"><span style=3D"font-size:=
10.5pt;font-family:Wingdings;color:#6A737D"><span style=3D"mso-list:Ignore"=
>=D8<span style=3D"font:7.0pt &quot;Times New Roman&quot;">&nbsp;
</span></span></span></span><![endif]><span class=3D"pl-s">&nbsp;an applica=
tion component) that runs in a TEE.<o:p></o:p></span></p>
<p class=3D"MsoNormal">Thus the &#8220;that runs&#8221; means a TA is speci=
fically code, not something that might<o:p></o:p></p>
<p class=3D"MsoNormal">refer to a SUIT manifest containing only personaliza=
tion data.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Elsewhere in the arch doc it talked about the TAM in=
stalling &#8220;Trusted Applications&#8221;, such as<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo1"><![if !supportLists]><span style=3D"font-size:10.5pt;font-family:Wi=
ngdings;color:#6A737D"><span style=3D"mso-list:Ignore">=D8<span style=3D"fo=
nt:7.0pt &quot;Times New Roman&quot;">&nbsp;
</span></span></span><![endif]>A TA Signer selects one or more TAMs and com=
municates the TA(s) to the TAM.<o:p></o:p></p>
<p class=3D"MsoNormal">for example (plenty of other places too), except tha=
t such statements should also apply<o:p></o:p></p>
<p class=3D"MsoNormal">to personalization data expressed via their own mani=
fest, but the term &#8220;TA&#8221; implies the<o:p></o:p></p>
<p class=3D"MsoNormal">relevant text is limited to things containing code.<=
o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">The term &#8220;trusted components&#8221; does appea=
r in the doc in a way that refers to<br>
TAs and/or personalization data, such as in this sentence:<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo1"><![if !supportLists]><span style=3D"font-size:10.5pt;font-family:Wi=
ngdings;color:#6A737D"><span style=3D"mso-list:Ignore">=D8<span style=3D"fo=
nt:7.0pt &quot;Times New Roman&quot;">&nbsp;
</span></span></span><![endif]>When the TEEP Agent subsequently receives th=
e TA to install and the TA's manifest<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo1"><![if !supportLists]><span style=3D"font-size:10.5pt;font-family:Wi=
ngdings;color:#6A737D"><span style=3D"mso-list:Ignore">=D8<span style=3D"fo=
nt:7.0pt &quot;Times New Roman&quot;">&nbsp;
</span></span></span><![endif]>indicates dependencies on any other trusted =
components, each dependency can include<o:p></o:p></p>
<p class=3D"MsoListParagraph" style=3D"text-indent:-.25in;mso-list:l0 level=
1 lfo1"><![if !supportLists]><span style=3D"font-size:10.5pt;font-family:Wi=
ngdings;color:#6A737D"><span style=3D"mso-list:Ignore">=D8<span style=3D"fo=
nt:7.0pt &quot;Times New Roman&quot;">&nbsp;
</span></span></span><![endif]>a list of TAM URIs for the relevant dependen=
cy.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">As a document editor, I would like to make &#8220;Tr=
usted Components&#8221; a term defined in the<br>
terminology section as referring to TAs and/or Personalization Data, and fi=
x text<o:p></o:p></p>
<p class=3D"MsoNormal">that says TA that should instead say Trusted Compone=
nts more generally.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">In theory an alternative approach would be to redefi=
ned TAs to not just be code but to also include<o:p></o:p></p>
<p class=3D"MsoNormal">only data.&nbsp; But that would seem to go against t=
he normal human expectation that &#8220;app&#8221; means<br>
something that has code (and maybe data too, but not data-only).<o:p></o:p>=
</p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><a href=3D"https://github.com/ietf-teep/architecture=
/pull/212/files">https://github.com/ietf-teep/architecture/pull/212/files</=
a> shows proposed diffs if we go ahead<o:p></o:p></p>
<p class=3D"MsoNormal">and make the change to use Trusted Components as a m=
ore formal term, just like TA is.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Please speak up if you have strong opinions on this =
editorial change.&nbsp; I would like to make<o:p></o:p></p>
<p class=3D"MsoNormal">a decision one way or the other before the I-D deadl=
ine.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Dave<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
</body>
</html>

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Subject: Re: [Teep] [Rats] EAT claims needed by TEEP
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Personally, I think attestation of TEE=E2=80=99s is pretty important and =
should be handled well in EAT. So I=E2=80=99m interested in working on =
and adding claims for this to EAT.

After reading section 7.1 in TEEP architecture, it does seem like there =
some work to do here to get to specific standardized interoperable =
claims.

More comments below.

> On Oct 26, 2020, at 3:15 PM, Dave Thaler =
<dthaler=3D40microsoft.com@dmarc.ietf.org> wrote:
>=20
> As discussed in previous IETF meetings, if there are claims beyond the =
base set that
> other WGs need, they can be specified by the other WGs with review by =
RATS.
> =20
> The TEEP WG needs the following in EATs and I am not sure whether they =
can be
> covered by existing claims or whether TEEP-specific claims are needed. =
 From
> section 7.1 of draft-ietf-teep-architecture:
> =20
> =C3=98     -  Device Identifying Information: TEEP attestations may =
need to
> =C3=98        uniquely identify a device to the TAM.  Unique device
> =C3=98        identification allows the TAM to provide services to the =
device,
> =C3=98        such as managing installed TAs, and providing =
subscriptions to
> =C3=98        services, and locating device-specific keying material =
to
> =C3=98        communicate with or authenticate the device.
> =20
> I believe the Universal Entity ID Claim (ueid) is claim that meets the =
above requirement.
> But the TEEP arch then goes on to say:
> =20
> =C3=98        In some use cases it
> =C3=98        may be sufficient to identify only the class of the =
device.  The
> =C3=98        security and privacy requirements regarding device =
identification
> =C3=98        will vary with the type of TA provisioned to the TEE.
> Which EAT claim contains the device class? The closest thing I see is =
OEM Identification by IEEE (oemid)
> but I am not sure that is sufficient since it's only the OEM not the =
device class from that OEM.
> This doesn=E2=80=99t seem like something that should be TEEP specific =
though, so can someone tell me how to
> represent device class using the claims in the EAT spec?

I don=E2=80=99t think the OEMID, UEID or other should be (ab)used  to =
represent device class. That would result in them being less reliable =
and useful in a generic sense. We should come up with a new claim.

We can define a claim to be  the device class and make it a byte string =
like a UEID, but I think we have to go further to make it useful as an =
interoperable standardize claim. There has to be some method for the =
classification. TrustZone vs hypervisor based? Fast vs slow? Has a =
protected mode kernel and TAs? The TEEP document doesn=E2=80=99t say. =
This seems problematic without a classification scheme.

I wonder if the intent is more about grouping, in which case we can =
define a GEID (Group Entity ID) that looks a lot like a UEID. That seems =
useful and sensible to me. It is not about classification based on any =
characteristics. It lines up with the privacy preserving technique of =
one key per 100,000 devices.


> =C3=98     -  TEE Identifying Information: The type of TEE that =
generated this
> =C3=98        attestation must be identified, including version =
identification
> =C3=98        information such as the hardware, firmware, and software =
version
> =C3=98        of the TEE, as applicable by the TEE type.  TEE =
manufacturer
> =C3=98        information for the TEE is required in order to =
disambiguate the
> =C3=98        same TEE type created by different manufacturers and =
address
> =C3=98        considerations around manufacturer provisioning, keying =
and
> =C3=98        support for the TEE.
> =20
> Similarly for this requirement, the closest thing I see is Origination =
Claim (origination) but I am not sure
> that is sufficient since it's just the manufacturer not the "version =
identification information such as the
> hardware, firmware, and software version of the TEE=E2=80=9D

Definitely not origination claim. The intent of it something like =
Endorser identification and I think it should be replaced by an =
Endorser/X.509 cert URL.

I would say, this is a combination of claims

I=E2=80=99ve just added a PR =
<https://github.com/ietf-rats-wg/eat/pull/68> for HW version claims.

The intent for SW version claims is to use CoSWID. We should probably =
create some examples to see if it can represent what TEEP wants to =
represent.

The paragraph mentions =E2=80=9Ctype of TEE=E2=80=9D. I=E2=80=99m not =
sure what is intended. I don=E2=80=99t know of any common taxonomy for =
classifying TEEs.


> Should the TEEP WG define TEEP-specific claims for such information?

I=E2=80=99d like to see most of them go into EAT unless they are super =
specific to TEEP (TEEP not TEEs). I think there is value in broad =
standardize claims as it promotes interoperability of RATS.

LL


> =20
> Dave
> _______________________________________________
> RATS mailing list
> RATS@ietf.org <mailto:RATS@ietf.org>
> https://www.ietf.org/mailman/listinfo/rats =
<https://www.ietf.org/mailman/listinfo/rats>

--Apple-Mail=_1E4D0CE5-BAC2-4EE6-9A4B-5A16320DE1FC
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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" =
class=3D"">Personally, I think attestation of TEE=E2=80=99s is pretty =
important and should be handled well in EAT. So I=E2=80=99m interested =
in working on and adding claims for this to EAT.<div class=3D""><br =
class=3D""></div><div class=3D"">After reading section 7.1 in TEEP =
architecture, it does seem like there some work to do here to get to =
specific standardized interoperable claims.</div><div class=3D""><br =
class=3D""></div><div class=3D"">More comments below.<br =
class=3D""><div><br class=3D""><blockquote type=3D"cite" class=3D""><div =
class=3D"">On Oct 26, 2020, at 3:15 PM, Dave Thaler &lt;<a =
href=3D"mailto:dthaler=3D40microsoft.com@dmarc.ietf.org" =
class=3D"">dthaler=3D40microsoft.com@dmarc.ietf.org</a>&gt; =
wrote:</div><br class=3D"Apple-interchange-newline"><div class=3D""><div =
class=3D"WordSection1" style=3D"page: WordSection1; caret-color: rgb(0, =
0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none;"><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D"">As =
discussed in previous IETF meetings, if there are claims beyond the base =
set that<br class=3D"">other WGs need, they can be specified by the =
other WGs with review by RATS.<o:p class=3D""></o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><o:p class=3D"">&nbsp;</o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D"">The TEEP WG needs the following in EATs =
and I am not sure whether they can be<o:p class=3D""></o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D"">covered by existing claims or whether =
TEEP-specific claims are needed.&nbsp; From<o:p =
class=3D""></o:p></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D"">section =
7.1 of draft-ietf-teep-architecture:<o:p class=3D""></o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><o:p class=3D"">&nbsp;</o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; text-indent: -0.25in;" class=3D""><span =
style=3D"font-size: 10pt; font-family: Wingdings;" class=3D""><span =
class=3D"">=C3=98<span style=3D"font-style: normal; font-variant-caps: =
normal; font-weight: normal; font-stretch: normal; font-size: 7pt; =
line-height: normal; font-family: &quot;Times New Roman&quot;;" =
class=3D"">&nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span></span></span></span><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;-&nbsp; Device Identifying Information: =
TEEP attestations may need to<o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; text-indent: -0.25in;" class=3D""><span =
style=3D"font-size: 10pt; font-family: Wingdings;" class=3D""><span =
class=3D"">=C3=98<span style=3D"font-style: normal; font-variant-caps: =
normal; font-weight: normal; font-stretch: normal; font-size: 7pt; =
line-height: normal; font-family: &quot;Times New Roman&quot;;" =
class=3D"">&nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span></span></span></span><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;uniquely identify a =
device to the TAM.&nbsp; Unique device<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: =
-0.25in;" class=3D""><span style=3D"font-size: 10pt; font-family: =
Wingdings;" class=3D""><span class=3D"">=C3=98<span style=3D"font-style: =
normal; font-variant-caps: normal; font-weight: normal; font-stretch: =
normal; font-size: 7pt; line-height: normal; font-family: &quot;Times =
New Roman&quot;;" class=3D"">&nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span></span></span></span><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;identification allows the =
TAM to provide services to the device,<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: =
-0.25in;" class=3D""><span style=3D"font-size: 10pt; font-family: =
Wingdings;" class=3D""><span class=3D"">=C3=98<span style=3D"font-style: =
normal; font-variant-caps: normal; font-weight: normal; font-stretch: =
normal; font-size: 7pt; line-height: normal; font-family: &quot;Times =
New Roman&quot;;" class=3D"">&nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span></span></span></span><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;such as managing =
installed TAs, and providing subscriptions to<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: =
-0.25in;" class=3D""><span style=3D"font-size: 10pt; font-family: =
Wingdings;" class=3D""><span class=3D"">=C3=98<span style=3D"font-style: =
normal; font-variant-caps: normal; font-weight: normal; font-stretch: =
normal; font-size: 7pt; line-height: normal; font-family: &quot;Times =
New Roman&quot;;" class=3D"">&nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span></span></span></span><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;services, and locating =
device-specific keying material to<o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif; text-indent: -0.25in;" class=3D""><span =
style=3D"font-size: 10pt; font-family: Wingdings;" class=3D""><span =
class=3D"">=C3=98<span style=3D"font-style: normal; font-variant-caps: =
normal; font-weight: normal; font-stretch: normal; font-size: 7pt; =
line-height: normal; font-family: &quot;Times New Roman&quot;;" =
class=3D"">&nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span></span></span></span><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;communicate with or =
authenticate the device.<o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span style=3D"font-size: 10pt; =
font-family: &quot;Courier New&quot;;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;Segoe =
UI&quot;, sans-serif; color: rgb(36, 41, 46);" class=3D"">I believe the =
Universal Entity ID Claim (ueid) is claim that meets the above =
requirement.<br class=3D"">But the TEEP arch then goes on to =
say:</span><span style=3D"font-size: 10pt; font-family: &quot;Courier =
New&quot;;" class=3D""><o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt 0.25in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span style=3D"font-size: 10pt; =
font-family: &quot;Courier New&quot;;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div><div style=3D"margin: 0in 0in =
0.0001pt 0.5in; font-size: 11pt; font-family: Calibri, sans-serif; =
text-indent: -0.25in;" class=3D""><span style=3D"font-size: 10pt; =
font-family: Wingdings;" class=3D""><span class=3D"">=C3=98<span =
style=3D"font-style: normal; font-variant-caps: normal; font-weight: =
normal; font-stretch: normal; font-size: 7pt; line-height: normal; =
font-family: &quot;Times New Roman&quot;;" class=3D"">&nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span></span></span></span><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;In some use cases it<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: =
-0.25in;" class=3D""><span style=3D"font-size: 10pt; font-family: =
Wingdings;" class=3D""><span class=3D"">=C3=98<span style=3D"font-style: =
normal; font-variant-caps: normal; font-weight: normal; font-stretch: =
normal; font-size: 7pt; line-height: normal; font-family: &quot;Times =
New Roman&quot;;" class=3D"">&nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span></span></span></span><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;may be sufficient to =
identify only the class of the device.&nbsp; The<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: =
-0.25in;" class=3D""><span style=3D"font-size: 10pt; font-family: =
Wingdings;" class=3D""><span class=3D"">=C3=98<span style=3D"font-style: =
normal; font-variant-caps: normal; font-weight: normal; font-stretch: =
normal; font-size: 7pt; line-height: normal; font-family: &quot;Times =
New Roman&quot;;" class=3D"">&nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span></span></span></span><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;security and privacy =
requirements regarding device identification<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 11pt; font-family: Calibri, sans-serif; text-indent: =
-0.25in;" class=3D""><span style=3D"font-size: 10pt; font-family: =
Wingdings;" class=3D""><span class=3D"">=C3=98<span style=3D"font-style: =
normal; font-variant-caps: normal; font-weight: normal; font-stretch: =
normal; font-size: 7pt; line-height: normal; font-family: &quot;Times =
New Roman&quot;;" class=3D"">&nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span></span></span></span><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;will vary with the type =
of TA provisioned to the TEE.<o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: white;" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;Segoe UI&quot;, =
sans-serif; color: rgb(36, 41, 46);" class=3D"">Which EAT claim contains =
the device class? The closest thing I see is OEM Identification by IEEE =
(oemid)<br class=3D"">but I am not sure that is sufficient since it's =
only the OEM not the device class from that OEM.<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif; background-color: =
white;" class=3D""><span style=3D"font-size: 10.5pt; font-family: =
&quot;Segoe UI&quot;, sans-serif; color: rgb(36, 41, 46);" class=3D"">This=
 doesn=E2=80=99t seem like something that should be TEEP specific =
though, so can someone tell me how to<br class=3D"">represent device =
class using the claims in the EAT =
spec?</span></div></div></div></blockquote><div><br =
class=3D""></div><div>I don=E2=80=99t think the OEMID, UEID or other =
should be (ab)used &nbsp;to represent device class. That would result in =
them being less reliable and useful in a generic sense. We should come =
up with a new claim.</div><div><br class=3D""></div><div>We can define a =
claim to be &nbsp;the device class and make it a byte string like a =
UEID, but I think we have to go further to make it useful as an =
interoperable standardize claim. There has to be some method for the =
classification. TrustZone vs hypervisor based? Fast vs slow? Has a =
protected mode kernel and TAs? The TEEP document doesn=E2=80=99t say. =
This seems problematic without a classification scheme.</div><div><br =
class=3D""></div><div>I wonder if the intent is more about grouping, in =
which case we can define a GEID (Group Entity ID) that looks a lot like =
a UEID. That seems useful and sensible to me. It is not about =
classification based on any characteristics. It lines up with the =
privacy preserving technique of one key per 100,000 =
devices.</div><div><br class=3D""></div><div><br =
class=3D""></div><blockquote type=3D"cite" class=3D""><div class=3D""><div=
 class=3D"WordSection1" style=3D"page: WordSection1; caret-color: rgb(0, =
0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none;"><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif; background-color: =
white;" class=3D""><span style=3D"font-size: 10.5pt; font-family: =
&quot;Segoe UI&quot;, sans-serif; color: rgb(36, 41, 46);" class=3D""><o:p=
 class=3D""></o:p></span></div><pre style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 10pt; font-family: &quot;Courier New&quot;; =
text-indent: -0.25in;" class=3D""><span style=3D"font-family: =
Wingdings;" class=3D""><span class=3D"">=C3=98<span style=3D"font-style: =
normal; font-variant-caps: normal; font-weight: normal; font-stretch: =
normal; font-size: 7pt; line-height: normal; font-family: &quot;Times =
New Roman&quot;;" class=3D"">&nbsp; </span></span></span><span style=3D"" =
class=3D"">&nbsp;&nbsp;&nbsp;-&nbsp; TEE Identifying Information: The =
type of TEE that generated this<o:p class=3D""></o:p></span></pre><pre =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 10pt; font-family: =
&quot;Courier New&quot;; text-indent: -0.25in;" class=3D""><span =
style=3D"font-family: Wingdings;" class=3D""><span class=3D"">=C3=98<span =
style=3D"font-style: normal; font-variant-caps: normal; font-weight: =
normal; font-stretch: normal; font-size: 7pt; line-height: normal; =
font-family: &quot;Times New Roman&quot;;" class=3D"">&nbsp; =
</span></span></span><span style=3D"" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;attestation must be =
identified, including version identification<o:p =
class=3D""></o:p></span></pre><pre style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 10pt; font-family: &quot;Courier New&quot;; =
text-indent: -0.25in;" class=3D""><span style=3D"font-family: =
Wingdings;" class=3D""><span class=3D"">=C3=98<span style=3D"font-style: =
normal; font-variant-caps: normal; font-weight: normal; font-stretch: =
normal; font-size: 7pt; line-height: normal; font-family: &quot;Times =
New Roman&quot;;" class=3D"">&nbsp; </span></span></span><span style=3D"" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;information such as the =
hardware, firmware, and software version<o:p =
class=3D""></o:p></span></pre><pre style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 10pt; font-family: &quot;Courier New&quot;; =
text-indent: -0.25in;" class=3D""><span style=3D"font-family: =
Wingdings;" class=3D""><span class=3D"">=C3=98<span style=3D"font-style: =
normal; font-variant-caps: normal; font-weight: normal; font-stretch: =
normal; font-size: 7pt; line-height: normal; font-family: &quot;Times =
New Roman&quot;;" class=3D"">&nbsp; </span></span></span><span style=3D"" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;of the TEE, as applicable =
by the TEE type.&nbsp; TEE manufacturer<o:p =
class=3D""></o:p></span></pre><pre style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 10pt; font-family: &quot;Courier New&quot;; =
text-indent: -0.25in;" class=3D""><span style=3D"font-family: =
Wingdings;" class=3D""><span class=3D"">=C3=98<span style=3D"font-style: =
normal; font-variant-caps: normal; font-weight: normal; font-stretch: =
normal; font-size: 7pt; line-height: normal; font-family: &quot;Times =
New Roman&quot;;" class=3D"">&nbsp; </span></span></span><span style=3D"" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;information for the TEE =
is required in order to disambiguate the<o:p =
class=3D""></o:p></span></pre><pre style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 10pt; font-family: &quot;Courier New&quot;; =
text-indent: -0.25in;" class=3D""><span style=3D"font-family: =
Wingdings;" class=3D""><span class=3D"">=C3=98<span style=3D"font-style: =
normal; font-variant-caps: normal; font-weight: normal; font-stretch: =
normal; font-size: 7pt; line-height: normal; font-family: &quot;Times =
New Roman&quot;;" class=3D"">&nbsp; </span></span></span><span style=3D"" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;same TEE type created by =
different manufacturers and address<o:p class=3D""></o:p></span></pre><pre=
 style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 10pt; font-family: =
&quot;Courier New&quot;; text-indent: -0.25in;" class=3D""><span =
style=3D"font-family: Wingdings;" class=3D""><span class=3D"">=C3=98<span =
style=3D"font-style: normal; font-variant-caps: normal; font-weight: =
normal; font-stretch: normal; font-size: 7pt; line-height: normal; =
font-family: &quot;Times New Roman&quot;;" class=3D"">&nbsp; =
</span></span></span><span style=3D"" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;considerations around =
manufacturer provisioning, keying and<o:p =
class=3D""></o:p></span></pre><pre style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 10pt; font-family: &quot;Courier New&quot;; =
text-indent: -0.25in;" class=3D""><span style=3D"font-family: =
Wingdings;" class=3D""><span class=3D"">=C3=98<span style=3D"font-style: =
normal; font-variant-caps: normal; font-weight: normal; font-stretch: =
normal; font-size: 7pt; line-height: normal; font-family: &quot;Times =
New Roman&quot;;" class=3D"">&nbsp; </span></span></span><span style=3D"" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;support for the TEE.<o:p =
class=3D""></o:p></span></pre><pre style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D""><span style=3D"" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></pre><p class=3D"MsoNormal" =
style=3D"margin: 3pt 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif; background-color: white; background-position: =
initial initial; background-repeat: initial initial;"><span =
style=3D"font-size: 10.5pt; font-family: &quot;Segoe UI&quot;, =
sans-serif; color: rgb(36, 41, 46);" class=3D"">Similarly for this =
requirement, the closest thing I see is Origination Claim (origination) =
but I am not sure<br class=3D"">that is sufficient since it's just the =
manufacturer not the "version identification information such as the<br =
class=3D"">hardware, firmware, and software version of the =
TEE=E2=80=9D</span></p></div></div></blockquote><div><br =
class=3D""></div><div>Definitely not origination claim. The intent of it =
something like Endorser identification and I think it should be replaced =
by an Endorser/X.509 cert URL.</div><div><br class=3D""></div><div>I =
would say, this is a combination of claims</div><div><br =
class=3D""></div><div>I=E2=80=99ve just added a&nbsp;<a =
href=3D"https://github.com/ietf-rats-wg/eat/pull/68" =
class=3D"">PR</a>&nbsp;for HW version claims.</div><div><br =
class=3D""></div><div>The intent for SW version claims is to use CoSWID. =
We should probably create some examples to see if it can represent what =
TEEP wants to represent.</div><div><br class=3D""></div><div>The =
paragraph mentions =E2=80=9Ctype of TEE=E2=80=9D. I=E2=80=99m not sure =
what is intended. I don=E2=80=99t know of any common taxonomy for =
classifying TEEs.</div><div><br class=3D""></div><br =
class=3D""><blockquote type=3D"cite" class=3D""><div class=3D""><div =
class=3D"WordSection1" style=3D"page: WordSection1; caret-color: rgb(0, =
0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none;"><p class=3D"MsoNormal" style=3D"margin: 3pt 0in =
0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; =
background-color: white; background-position: initial initial; =
background-repeat: initial initial;"><span style=3D"font-size: 10.5pt; =
font-family: &quot;Segoe UI&quot;, sans-serif; color: rgb(36, 41, 46);" =
class=3D""><o:p class=3D""></o:p></span></p><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D"">Should the TEEP WG define TEEP-specific claims for such =
information?</div></div></div></blockquote><div><br =
class=3D""></div><div>I=E2=80=99d like to see most of them go into EAT =
unless they are super specific to TEEP (TEEP not TEEs). I think there is =
value in broad standardize claims as it promotes interoperability of =
RATS.</div><div><br class=3D""></div><div>LL</div><div><br =
class=3D""></div><br class=3D""><blockquote type=3D"cite" class=3D""><div =
class=3D""><div class=3D"WordSection1" style=3D"page: WordSection1; =
caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; text-decoration: none;"><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><o:p class=3D""></o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><o:p class=3D"">&nbsp;</o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D"">Dave<o:p =
class=3D""></o:p></div></div><span style=3D"caret-color: rgb(0, 0, 0); =
font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none; float: none; display: inline !important;" =
class=3D"">_______________________________________________</span><br =
style=3D"caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant-caps: normal; font-weight: =
normal; letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; text-decoration: none;" class=3D""><span =
style=3D"caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant-caps: normal; font-weight: =
normal; letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; text-decoration: none; float: none; =
display: inline !important;" class=3D"">RATS mailing list</span><br =
style=3D"caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant-caps: normal; font-weight: =
normal; letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; text-decoration: none;" class=3D""><a =
href=3D"mailto:RATS@ietf.org" style=3D"color: rgb(149, 79, 114); =
text-decoration: underline; font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-size-adjust: auto; =
-webkit-text-stroke-width: 0px;" class=3D"">RATS@ietf.org</a><br =
style=3D"caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant-caps: normal; font-weight: =
normal; letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; text-decoration: none;" class=3D""><a =
href=3D"https://www.ietf.org/mailman/listinfo/rats" style=3D"color: =
rgb(149, 79, 114); text-decoration: underline; font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant-caps: normal; =
font-weight: normal; letter-spacing: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; =
-webkit-text-stroke-width: 0px;" =
class=3D"">https://www.ietf.org/mailman/listinfo/rats</a></div></blockquot=
e></div><br class=3D""></div></body></html>=

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From: Dave Thaler <dthaler@microsoft.com>
To: Laurence Lundblade <lgl@island-resort.com>
CC: "rats@ietf.org" <rats@ietf.org>, teep <teep@ietf.org>
Thread-Topic: [Rats] EAT claims needed by TEEP
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Archived-At: <https://mailarchive.ietf.org/arch/msg/teep/wiNaRvtmSUTxpCTnVIiku-IfeWo>
Subject: Re: [Teep] [Rats] EAT claims needed by TEEP
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Subject: Re: [Teep] [Rats] EAT claims needed by TEEP
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CoSWID should cover all the identification of vendors, models, versions =
and stuff for SW. If it doesn=E2=80=99t talk to Henk about fixes to =
CoSWID. :-)

For HW, there is OEMID and recently proposed chip version, board version =
and device version. It seems like we need a model number claim for HW. I =
will work on that.

Seems like submodules would be used to organize claims for layered =
attestation and all of the above claims can occur in any submodule they =
need to.

Does this mostly cover it?=20

I worry that the HW claims are bit too rigid in their use of EAN-13 and =
IEEE registries. Might need to do something about that.

LL


> On Oct 27, 2020, at 1:26 PM, Dave Thaler <dthaler@microsoft.com> =
wrote:
>=20
> Inline below=E2=80=A6
> =20
> From: Laurence Lundblade <lgl@island-resort.com =
<mailto:lgl@island-resort.com>>=20
> Sent: Tuesday, October 27, 2020 11:57 AM
> To: Dave Thaler <dthaler@microsoft.com <mailto:dthaler@microsoft.com>>
> Cc: rats@ietf.org <mailto:rats@ietf.org>; teep <teep@ietf.org =
<mailto:teep@ietf.org>>
> Subject: Re: [Rats] EAT claims needed by TEEP
> =20
> Personally, I think attestation of TEE=E2=80=99s is pretty important =
and should be handled well in EAT. So I=E2=80=99m interested in working =
on and adding claims for this to EAT.
> =20
> After reading section 7.1 in TEEP architecture, it does seem like =
there some work to do here to get to specific standardized interoperable =
claims.
> =20
> More comments below.
>=20
>=20
> On Oct 26, 2020, at 3:15 PM, Dave Thaler =
<dthaler=3D40microsoft.com@dmarc.ietf.org =
<mailto:dthaler=3D40microsoft.com@dmarc.ietf.org>> wrote:
> =20
> As discussed in previous IETF meetings, if there are claims beyond the =
base set that
> other WGs need, they can be specified by the other WGs with review by =
RATS.
> =20
> The TEEP WG needs the following in EATs and I am not sure whether they =
can be
> covered by existing claims or whether TEEP-specific claims are needed. =
 From
> section 7.1 of draft-ietf-teep-architecture:
> =20
> =C3=98     -  Device Identifying Information: TEEP attestations may =
need to
> =C3=98        uniquely identify a device to the TAM.  Unique device
> =C3=98        identification allows the TAM to provide services to the =
device,
> =C3=98        such as managing installed TAs, and providing =
subscriptions to
> =C3=98        services, and locating device-specific keying material =
to
> =C3=98        communicate with or authenticate the device.
> =20
> I believe the Universal Entity ID Claim (ueid) is claim that meets the =
above requirement.
> But the TEEP arch then goes on to say:
> =20
> =C3=98        In some use cases it
> =C3=98        may be sufficient to identify only the class of the =
device.  The
> =C3=98        security and privacy requirements regarding device =
identification
> =C3=98        will vary with the type of TA provisioned to the TEE.
> Which EAT claim contains the device class? The closest thing I see is =
OEM Identification by IEEE (oemid)
> but I am not sure that is sufficient since it's only the OEM not the =
device class from that OEM.
> This doesn=E2=80=99t seem like something that should be TEEP specific =
though, so can someone tell me how to
> represent device class using the claims in the EAT spec?
> =20
> I don=E2=80=99t think the OEMID, UEID or other should be (ab)used  to =
represent device class. That would result in them being less reliable =
and useful in a generic sense. We should come up with a new claim.
> =20
> +1
> =20
> We can define a claim to be  the device class and make it a byte =
string like a UEID, but I think we have to go further to make it useful =
as an interoperable standardize claim. There has to be some method for =
the classification. TrustZone vs hypervisor based? Fast vs slow? Has a =
protected mode kernel and TAs? The TEEP document doesn=E2=80=99t say. =
This seems problematic without a classification scheme.
> =20
> [DT] I=E2=80=99m not sure we need a classification scheme, at least =
for TEEP.  A simple device class byte string as you suggest would =
suffice in my opinion.
> =20
> I wonder if the intent is more about grouping, in which case we can =
define a GEID (Group Entity ID) that looks a lot like a UEID. That seems =
useful and sensible to me. It is not about classification based on any =
characteristics. It lines up with the privacy preserving technique of =
one key per 100,000 devices.
> =20
> =C3=98     -  TEE Identifying Information: The type of TEE that =
generated this
> =C3=98        attestation must be identified, including version =
identification
> =C3=98        information such as the hardware, firmware, and software =
version
> =C3=98        of the TEE, as applicable by the TEE type.  TEE =
manufacturer
> =C3=98        information for the TEE is required in order to =
disambiguate the
> =C3=98        same TEE type created by different manufacturers and =
address
> =C3=98        considerations around manufacturer provisioning, keying =
and
> =C3=98        support for the TEE.
> =20
> Similarly for this requirement, the closest thing I see is Origination =
Claim (origination) but I am not sure
> that is sufficient since it's just the manufacturer not the "version =
identification information such as the
> hardware, firmware, and software version of the TEE=E2=80=9D
> =20
> Definitely not origination claim.=20
> =20
> +1
> =20
> The intent of it something like Endorser identification and I think it =
should be replaced by an Endorser/X.509 cert URL.
> =20
> I would say, this is a combination of claims
> =20
> It=E2=80=99s just used:
> 1)     For a Verifier in appraising the evidence (nothing TEEP =
specific here, appraisal policy can involve any claim), and
> 2)     To be used by a TAM to decide which TA=E2=80=99s apply to the =
TEE.  In that sense it=E2=80=99s just like any other vendor id + device =
class for any non TEE, and I believe if there were a byte string for =
device class as you suggest that would be sufficient in my opinion.
> =20
> Keeping in mind the =E2=80=9Clayered attestation=E2=80=9D concept in =
the arch doc, as long as we have a claimset per layer, then I think the =
same =E2=80=9Cvendor id=E2=80=9D and =E2=80=9Cclass=E2=80=9D claims that =
would apply to any device could be reused for the TEE, and reused for =
describing each layer.  E.g., a =E2=80=9Cversion=E2=80=9D claim would =
apply at the hardware layer and be the hardware version, at the firmware =
layer and be a firmware version, at the OS layer and be an OS version, =
etc.
> =20
> =20
> I=E2=80=99ve just added a PR =
<https://nam06.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fgithu=
b.com%2Fietf-rats-wg%2Feat%2Fpull%2F68&data=3D04%7C01%7Cdthaler%40microsof=
t.com%7Cab1ee7788f1f4d449c5508d87aaa3006%7C72f988bf86f141af91ab2d7cd011db4=
7%7C1%7C0%7C637394218658895685%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDA=
iLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=3DJyNCTwUJvkC=
Pk3H9uYmD0BLfUXPu6vhnQomkIqiqiUM%3D&reserved=3D0> for HW version claims.
> =20
> The intent for SW version claims is to use CoSWID. We should probably =
create some examples to see if it can represent what TEEP wants to =
represent.
> =20
> Agree this sounds promising.
> =20
> The paragraph mentions =E2=80=9Ctype of TEE=E2=80=9D. I=E2=80=99m not =
sure what is intended. I don=E2=80=99t know of any common taxonomy for =
classifying TEEs.
> =20
> A unique identifier is sufficient in my view, no =E2=80=9Cclassification=
=E2=80=9D or =E2=80=9Ctaxonomy=E2=80=9D is required by anything that the =
TEEP WG has discussed to date, as far as I know.
>=20
> Should the TEEP WG define TEEP-specific claims for such information?
> =20
> I=E2=80=99d like to see most of them go into EAT unless they are super =
specific to TEEP (TEEP not TEEs). I think there is value in broad =
standardize claims as it promotes interoperability of RATS.
> =20
> Sounds good to me.   Consider this a request to add some way to =
express =E2=80=9Cvendor id=E2=80=9D, =E2=80=9Cmodel=E2=80=9D (or =
=E2=80=9Cclass=E2=80=9D or whatever you want to call it), and =
=E2=80=9Cversion=E2=80=9D as claims that can be applied in claimsets at =
various layers.   I glanced at the PR you referenced and it seems to be =
a chip-specific version, not a generic version claim that can be used at =
multiple layers, so is not sufficient to meet the TEEP arch draft=E2=80=99=
s requirements, we still need other claims added.
> =20
> Thanks!
> Dave
> =20
> LL
> =20
>=20
>=20
> =20
> Dave
> _______________________________________________
> RATS mailing list
> RATS@ietf.org <mailto:RATS@ietf.org>
> https://www.ietf.org/mailman/listinfo/rats =
<https://nam06.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fwww.i=
etf.org%2Fmailman%2Flistinfo%2Frats&data=3D04%7C01%7Cdthaler%40microsoft.c=
om%7Cab1ee7788f1f4d449c5508d87aaa3006%7C72f988bf86f141af91ab2d7cd011db47%7=
C1%7C0%7C637394218658895685%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLC=
JQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=3DO5LJZBw%2B6huY=
U7BrNSgOUQNw2H5uoDGwZj09%2FPghKrI%3D&reserved=3D0>
> =20


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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D""><div =
class=3D"">CoSWID should cover all the identification of vendors, =
models, versions and stuff for SW. If it doesn=E2=80=99t talk to Henk =
about fixes to CoSWID. :-)</div><div class=3D""><br class=3D""></div><div =
class=3D"">For HW, there is OEMID and recently proposed chip version, =
board version and device version. It seems like we need a model number =
claim for HW. I will work on that.</div><div class=3D""><br =
class=3D""></div><div class=3D"">Seems like submodules would be used to =
organize claims for layered attestation and all of the above claims can =
occur in any submodule they need to.</div><div class=3D""><br =
class=3D""></div><div class=3D"">Does this mostly cover =
it?&nbsp;</div><div class=3D""><br class=3D""></div><div class=3D"">I =
worry that the HW claims are bit too rigid in their use of EAN-13 and =
IEEE registries. Might need to do something about that.</div><div =
class=3D""><br class=3D""></div>LL<div class=3D""><br class=3D""><div><br =
class=3D""><blockquote type=3D"cite" class=3D""><div class=3D"">On Oct =
27, 2020, at 1:26 PM, Dave Thaler &lt;<a =
href=3D"mailto:dthaler@microsoft.com" =
class=3D"">dthaler@microsoft.com</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><div =
class=3D"WordSection1" style=3D"page: WordSection1; caret-color: rgb(0, =
0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none;"><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;" =
class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D"">Inline below=E2=80=A6<o:p=
 class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;" =
class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div><div class=3D""><div =
style=3D"border-style: solid none none; border-top-width: 1pt; =
border-top-color: rgb(225, 225, 225); padding: 3pt 0in 0in;" =
class=3D""><div style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: =
12pt; font-family: &quot;Times New Roman&quot;, serif;" class=3D""><b =
class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">From:</span></b><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D""><span =
class=3D"Apple-converted-space">&nbsp;</span>Laurence Lundblade &lt;<a =
href=3D"mailto:lgl@island-resort.com" style=3D"color: purple; =
text-decoration: underline;" class=3D"">lgl@island-resort.com</a>&gt;<span=
 class=3D"Apple-converted-space">&nbsp;</span><br class=3D""><b =
class=3D"">Sent:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>Tuesday, October 27, 2020 =
11:57 AM<br class=3D""><b class=3D"">To:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>Dave Thaler &lt;<a =
href=3D"mailto:dthaler@microsoft.com" style=3D"color: purple; =
text-decoration: underline;" class=3D"">dthaler@microsoft.com</a>&gt;<br =
class=3D""><b class=3D"">Cc:</b><span =
class=3D"Apple-converted-space">&nbsp;</span><a =
href=3D"mailto:rats@ietf.org" style=3D"color: purple; text-decoration: =
underline;" class=3D"">rats@ietf.org</a>; teep &lt;<a =
href=3D"mailto:teep@ietf.org" style=3D"color: purple; text-decoration: =
underline;" class=3D"">teep@ietf.org</a>&gt;<br class=3D""><b =
class=3D"">Subject:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>Re: [Rats] EAT claims =
needed by TEEP<o:p class=3D""></o:p></span></div></div></div><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div><div style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">Personally, I think attestation of TEE=E2=80=99s is =
pretty important and should be handled well in EAT. So I=E2=80=99m =
interested in working on and adding claims for this to EAT.<o:p =
class=3D""></o:p></div><div class=3D""><div style=3D"margin: 0in 0in =
0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D"">After reading section 7.1 in TEEP =
architecture, it does seem like there some work to do here to get to =
specific standardized interoperable claims.<o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D"">More comments below.<o:p =
class=3D""></o:p></div><div class=3D""><div style=3D"margin: 0in 0in =
0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><br class=3D""><br class=3D""><o:p =
class=3D""></o:p></div><blockquote style=3D"margin-top: 5pt; =
margin-bottom: 5pt;" class=3D""><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D"">On Oct 26, 2020, at 3:15 PM, Dave Thaler =
&lt;<a href=3D"mailto:dthaler=3D40microsoft.com@dmarc.ietf.org" =
style=3D"color: purple; text-decoration: underline;" =
class=3D"">dthaler=3D40microsoft.com@dmarc.ietf.org</a>&gt; wrote:<o:p =
class=3D""></o:p></div></div><div style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><o:p class=3D"">&nbsp;</o:p></div><div class=3D""><div =
class=3D""><div style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: =
12pt; font-family: &quot;Times New Roman&quot;, serif;" class=3D""><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif;" class=3D"">As=
 discussed in previous IETF meetings, if there are claims beyond the =
base set that<br class=3D"">other WGs need, they can be specified by the =
other WGs with review by RATS.<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D"">&nbsp;<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D"">The TEEP WG needs the =
following in EATs and I am not sure whether they can be<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D"">covered by existing claims =
or whether TEEP-specific claims are needed.&nbsp; From<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D"">section 7.1 of =
draft-ietf-teep-architecture:<o:p class=3D""></o:p></span></div></div><div=
 class=3D""><div style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: =
12pt; font-family: &quot;Times New Roman&quot;, serif;" class=3D""><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D"">&nbsp;<o:p class=3D""></o:p></span></div></div><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif; text-indent: -0.25in;" class=3D""><span =
style=3D"font-size: 10pt; font-family: Wingdings;" =
class=3D"">=C3=98</span><span style=3D"font-size: 7pt;" =
class=3D"">&nbsp;<span =
class=3D"apple-converted-space">&nbsp;</span></span><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;-&nbsp; Device Identifying Information: =
TEEP attestations may need to</span><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div><div style=3D"margin-left: 0.5in;" =
class=3D""><div style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: =
12pt; font-family: &quot;Times New Roman&quot;, serif; text-indent: =
-0.25in;" class=3D""><span style=3D"font-size: 10pt; font-family: =
Wingdings;" class=3D"">=C3=98</span><span style=3D"font-size: 7pt;" =
class=3D"">&nbsp;<span =
class=3D"apple-converted-space">&nbsp;</span></span><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;uniquely identify a =
device to the TAM.&nbsp; Unique device</span><span style=3D"font-size: =
11pt; font-family: Calibri, sans-serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div><div style=3D"margin-left: 0.5in;" =
class=3D""><div style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: =
12pt; font-family: &quot;Times New Roman&quot;, serif; text-indent: =
-0.25in;" class=3D""><span style=3D"font-size: 10pt; font-family: =
Wingdings;" class=3D"">=C3=98</span><span style=3D"font-size: 7pt;" =
class=3D"">&nbsp;<span =
class=3D"apple-converted-space">&nbsp;</span></span><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;identification allows the =
TAM to provide services to the device,</span><span style=3D"font-size: =
11pt; font-family: Calibri, sans-serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div><div style=3D"margin-left: 0.5in;" =
class=3D""><div style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: =
12pt; font-family: &quot;Times New Roman&quot;, serif; text-indent: =
-0.25in;" class=3D""><span style=3D"font-size: 10pt; font-family: =
Wingdings;" class=3D"">=C3=98</span><span style=3D"font-size: 7pt;" =
class=3D"">&nbsp;<span =
class=3D"apple-converted-space">&nbsp;</span></span><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;such as managing =
installed TAs, and providing subscriptions to</span><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><o:p class=3D""></o:p></span></div></div><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif; text-indent: -0.25in;" class=3D""><span =
style=3D"font-size: 10pt; font-family: Wingdings;" =
class=3D"">=C3=98</span><span style=3D"font-size: 7pt;" =
class=3D"">&nbsp;<span =
class=3D"apple-converted-space">&nbsp;</span></span><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;services, and locating =
device-specific keying material to</span><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div><div style=3D"margin-left: 0.5in;" =
class=3D""><div style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: =
12pt; font-family: &quot;Times New Roman&quot;, serif; text-indent: =
-0.25in;" class=3D""><span style=3D"font-size: 10pt; font-family: =
Wingdings;" class=3D"">=C3=98</span><span style=3D"font-size: 7pt;" =
class=3D"">&nbsp;<span =
class=3D"apple-converted-space">&nbsp;</span></span><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;communicate with or =
authenticate the device.</span><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><span style=3D"font-size: 10pt; =
font-family: &quot;Courier New&quot;;" class=3D"">&nbsp;</span><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><o:p class=3D""></o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D""><span style=3D"font-size: =
10.5pt; font-family: &quot;Segoe UI&quot;, sans-serif; color: rgb(36, =
41, 46);" class=3D"">I believe the Universal Entity ID Claim (ueid) is =
claim that meets the above requirement.<br class=3D"">But the TEEP arch =
then goes on to say:</span><span style=3D"font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div><div style=3D"margin-left: 0.25in;" =
class=3D""><div style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: =
12pt; font-family: &quot;Times New Roman&quot;, serif;" class=3D""><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;</span><span style=3D"font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div><div style=3D"margin-left: 0.5in;" =
class=3D""><div style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: =
12pt; font-family: &quot;Times New Roman&quot;, serif; text-indent: =
-0.25in;" class=3D""><span style=3D"font-size: 10pt; font-family: =
Wingdings;" class=3D"">=C3=98</span><span style=3D"font-size: 7pt;" =
class=3D"">&nbsp;<span =
class=3D"apple-converted-space">&nbsp;</span></span><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;In some use cases =
it</span><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><o:p class=3D""></o:p></span></div></div><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif; text-indent: -0.25in;" class=3D""><span =
style=3D"font-size: 10pt; font-family: Wingdings;" =
class=3D"">=C3=98</span><span style=3D"font-size: 7pt;" =
class=3D"">&nbsp;<span =
class=3D"apple-converted-space">&nbsp;</span></span><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;may be sufficient to =
identify only the class of the device.&nbsp; The</span><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><o:p class=3D""></o:p></span></div></div><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif; text-indent: -0.25in;" class=3D""><span =
style=3D"font-size: 10pt; font-family: Wingdings;" =
class=3D"">=C3=98</span><span style=3D"font-size: 7pt;" =
class=3D"">&nbsp;<span =
class=3D"apple-converted-space">&nbsp;</span></span><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;security and privacy =
requirements regarding device identification</span><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><o:p class=3D""></o:p></span></div></div><div =
style=3D"margin-left: 0.5in;" class=3D""><div style=3D"margin: 0in 0in =
0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif; text-indent: -0.25in;" class=3D""><span =
style=3D"font-size: 10pt; font-family: Wingdings;" =
class=3D"">=C3=98</span><span style=3D"font-size: 7pt;" =
class=3D"">&nbsp;<span =
class=3D"apple-converted-space">&nbsp;</span></span><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;will vary with the type =
of TA provisioned to the TEE.</span><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif; background-color: white;" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;Segoe UI&quot;, =
sans-serif; color: rgb(36, 41, 46);" class=3D"">Which EAT claim contains =
the device class? The closest thing I see is OEM Identification by IEEE =
(oemid)<br class=3D"">but I am not sure that is sufficient since it's =
only the OEM not the device class from that OEM.</span><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><o:p class=3D""></o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif; background-color: white;" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;Segoe =
UI&quot;, sans-serif; color: rgb(36, 41, 46);" class=3D"">This doesn=E2=80=
=99t seem like something that should be TEEP specific though, so can =
someone tell me how to<br class=3D"">represent device class using the =
claims in the EAT spec?</span><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div></div></blockquote><div =
class=3D""><div style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: =
12pt; font-family: &quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D"">I don=E2=80=99t think the OEMID, UEID or =
other should be (ab)used &nbsp;to represent device class. That would =
result in them being less reliable and useful in a generic sense. We =
should come up with a new claim.<o:p class=3D""></o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D""><span style=3D"font-size: =
11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D""><o:p class=3D"">&nbsp;</o:p></span></div><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D"">+1<o:p class=3D""></o:p></span></div></div><div class=3D""><div=
 style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D"">We can define a claim to be &nbsp;the =
device class and make it a byte string like a UEID, but I think we have =
to go further to make it useful as an interoperable standardize claim. =
There has to be some method for the classification. TrustZone vs =
hypervisor based? Fast vs slow? Has a protected mode kernel and TAs? The =
TEEP document doesn=E2=80=99t say. This seems problematic without a =
classification scheme.<o:p class=3D""></o:p></div><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D""><o:p class=3D"">&nbsp;</o:p></span></div><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D"">[DT] I=E2=80=99m not sure we need a classification scheme, at =
least for TEEP. &nbsp;A simple device class byte string as you suggest =
would suffice in my opinion.<o:p class=3D""></o:p></span></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: =
12pt; font-family: &quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D"">I wonder if the intent is more about =
grouping, in which case we can define a GEID (Group Entity ID) that =
looks a lot like a UEID. That seems useful and sensible to me. It is not =
about classification based on any characteristics. It lines up with the =
privacy preserving technique of one key per 100,000 devices.<o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div></div><blockquote style=3D"margin-top: 5pt; =
margin-bottom: 5pt;" class=3D""><div class=3D""><pre style=3D"margin: =
0in 0in 0.0001pt 1in; font-size: 10pt; font-family: &quot;Courier =
New&quot;; text-indent: -0.25in;" class=3D""><span style=3D"font-family: =
Wingdings;" class=3D"">=C3=98</span><span style=3D"font-size: 7pt; =
font-family: &quot;Times New Roman&quot;, serif;" class=3D"">&nbsp; =
</span>&nbsp;&nbsp;&nbsp;-&nbsp; TEE Identifying Information: The type =
of TEE that generated this<o:p class=3D""></o:p></pre><pre =
style=3D"margin: 0in 0in 0.0001pt 1in; font-size: 10pt; font-family: =
&quot;Courier New&quot;; text-indent: -0.25in;" class=3D""><span =
style=3D"font-family: Wingdings;" class=3D"">=C3=98</span><span =
style=3D"font-size: 7pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">&nbsp; =
</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;attestation must be =
identified, including version identification<o:p =
class=3D""></o:p></pre><pre style=3D"margin: 0in 0in 0.0001pt 1in; =
font-size: 10pt; font-family: &quot;Courier New&quot;; text-indent: =
-0.25in;" class=3D""><span style=3D"font-family: Wingdings;" =
class=3D"">=C3=98</span><span style=3D"font-size: 7pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D"">&nbsp; =
</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;information such as the =
hardware, firmware, and software version<o:p class=3D""></o:p></pre><pre =
style=3D"margin: 0in 0in 0.0001pt 1in; font-size: 10pt; font-family: =
&quot;Courier New&quot;; text-indent: -0.25in;" class=3D""><span =
style=3D"font-family: Wingdings;" class=3D"">=C3=98</span><span =
style=3D"font-size: 7pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">&nbsp; </span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;of =
the TEE, as applicable by the TEE type.&nbsp; TEE manufacturer<o:p =
class=3D""></o:p></pre><pre style=3D"margin: 0in 0in 0.0001pt 1in; =
font-size: 10pt; font-family: &quot;Courier New&quot;; text-indent: =
-0.25in;" class=3D""><span style=3D"font-family: Wingdings;" =
class=3D"">=C3=98</span><span style=3D"font-size: 7pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D"">&nbsp; =
</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;information for the TEE is =
required in order to disambiguate the<o:p class=3D""></o:p></pre><pre =
style=3D"margin: 0in 0in 0.0001pt 1in; font-size: 10pt; font-family: =
&quot;Courier New&quot;; text-indent: -0.25in;" class=3D""><span =
style=3D"font-family: Wingdings;" class=3D"">=C3=98</span><span =
style=3D"font-size: 7pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">&nbsp; =
</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;same TEE type created by =
different manufacturers and address<o:p class=3D""></o:p></pre><pre =
style=3D"margin: 0in 0in 0.0001pt 1in; font-size: 10pt; font-family: =
&quot;Courier New&quot;; text-indent: -0.25in;" class=3D""><span =
style=3D"font-family: Wingdings;" class=3D"">=C3=98</span><span =
style=3D"font-size: 7pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">&nbsp; =
</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;considerations around =
manufacturer provisioning, keying and<o:p class=3D""></o:p></pre><pre =
style=3D"margin: 0in 0in 0.0001pt 1in; font-size: 10pt; font-family: =
&quot;Courier New&quot;; text-indent: -0.25in;" class=3D""><span =
style=3D"font-family: Wingdings;" class=3D"">=C3=98</span><span =
style=3D"font-size: 7pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">&nbsp; =
</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;support for the TEE.<o:p =
class=3D""></o:p></pre><pre style=3D"margin: 0in 0in 0.0001pt 1in; =
font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;<o:p class=3D""></o:p></pre><div style=3D"margin: 0in =
0in 0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif; background-color: white;" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;Segoe UI&quot;, =
sans-serif; color: rgb(36, 41, 46);" class=3D"">Similarly for this =
requirement, the closest thing I see is Origination Claim (origination) =
but I am not sure<br class=3D"">that is sufficient since it's just the =
manufacturer not the "version identification information such as the<br =
class=3D"">hardware, firmware, and software version of the =
TEE=E2=80=9D</span><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div></blockquote><div class=3D""><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D"">Definitely not origination claim.<span =
class=3D"Apple-converted-space">&nbsp;</span><span style=3D"color: =
rgb(31, 73, 125);" class=3D""><o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D""><span style=3D"font-size: =
11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D""><o:p class=3D"">&nbsp;</o:p></span></div><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D"">+1<o:p class=3D""></o:p></span></div><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D""><o:p class=3D"">&nbsp;</o:p></span></div><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D"">The intent of it something like Endorser =
identification and I think it should be replaced by an Endorser/X.509 =
cert URL.<o:p class=3D""></o:p></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D"">I would say, this is a combination of =
claims<o:p class=3D""></o:p></div><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D"">It=E2=80=99s just =
used:<o:p class=3D""></o:p></span></div><div style=3D"margin: 0in 0in =
0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif; text-indent: -0.25in;" class=3D""><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: =
rgb(31, 73, 125);" class=3D""><span class=3D"">1)<span =
style=3D"font-style: normal; font-variant-caps: normal; font-weight: =
normal; font-stretch: normal; font-size: 7pt; line-height: normal; =
font-family: &quot;Times New Roman&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span></span></span></span><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: =
rgb(31, 73, 125);" class=3D"">For a Verifier in appraising the evidence =
(nothing TEEP specific here, appraisal policy can involve any claim), =
and<o:p class=3D""></o:p></span></div><div style=3D"margin: 0in 0in =
0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif; text-indent: -0.25in;" class=3D""><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: =
rgb(31, 73, 125);" class=3D""><span class=3D"">2)<span =
style=3D"font-style: normal; font-variant-caps: normal; font-weight: =
normal; font-stretch: normal; font-size: 7pt; line-height: normal; =
font-family: &quot;Times New Roman&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span></span></span></span><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: =
rgb(31, 73, 125);" class=3D"">To be used by a TAM to decide which TA=E2=80=
=99s apply to the TEE.&nbsp; In that sense it=E2=80=99s just like any =
other vendor id + device class for any non TEE, and I believe if there =
were a byte string for device class as you suggest that would be =
sufficient in my opinion.<o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D""><span style=3D"font-size: =
11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D""><o:p class=3D"">&nbsp;</o:p></span></div><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D"">Keeping in mind the =E2=80=9Clayered attestation=E2=80=9D =
concept in the arch doc, as long as we have a claimset per layer, then I =
think the same =E2=80=9Cvendor id=E2=80=9D and =E2=80=9Cclass=E2=80=9D =
claims that would apply to any device could be reused for the TEE, and =
reused for describing each layer.&nbsp; E.g., a =E2=80=9Cversion=E2=80=9D =
claim would apply at the hardware layer and be the hardware version, at =
the firmware layer and be a firmware version, at the OS layer and be an =
OS version, etc.<o:p class=3D""></o:p></span></div><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D""><o:p class=3D"">&nbsp;</o:p></span></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: =
12pt; font-family: &quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D"">I=E2=80=99ve just added a&nbsp;<a =
href=3D"https://nam06.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%=
2Fgithub.com%2Fietf-rats-wg%2Feat%2Fpull%2F68&amp;data=3D04%7C01%7Cdthaler=
%40microsoft.com%7Cab1ee7788f1f4d449c5508d87aaa3006%7C72f988bf86f141af91ab=
2d7cd011db47%7C1%7C0%7C637394218658895685%7CUnknown%7CTWFpbGZsb3d8eyJWIjoi=
MC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdat=
a=3DJyNCTwUJvkCPk3H9uYmD0BLfUXPu6vhnQomkIqiqiUM%3D&amp;reserved=3D0" =
style=3D"color: purple; text-decoration: underline;" =
class=3D"">PR</a>&nbsp;for HW version claims.<o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D"">The intent for SW version claims is to =
use CoSWID. We should probably create some examples to see if it can =
represent what TEEP wants to represent.<o:p class=3D""></o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D""><span style=3D"font-size: =
11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D""><o:p class=3D"">&nbsp;</o:p></span></div><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D"">Agree this sounds promising.<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D"">The paragraph mentions =E2=80=9Ctype of =
TEE=E2=80=9D. I=E2=80=99m not sure what is intended. I don=E2=80=99t =
know of any common taxonomy for classifying TEEs.<o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div></div><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><span style=3D"color: rgb(31, 73, 125);" class=3D"">A =
unique identifier is sufficient in my view, no =E2=80=9Cclassification=E2=80=
=9D or =E2=80=9Ctaxonomy=E2=80=9D is required by anything that the TEEP =
WG has discussed to date, as far as I know.</span><br class=3D""><br =
class=3D""><o:p class=3D""></o:p></div><blockquote style=3D"margin-top: =
5pt; margin-bottom: 5pt;" class=3D""><div class=3D""><div class=3D""><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D""><span style=3D"font-size: =
11pt; font-family: Calibri, sans-serif;" class=3D"">Should the TEEP WG =
define TEEP-specific claims for such information?<o:p =
class=3D""></o:p></span></div></div></div></blockquote><div =
class=3D""><div style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: =
12pt; font-family: &quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D"">I=E2=80=99d like to see most of them go =
into EAT unless they are super specific to TEEP (TEEP not TEEs). I think =
there is value in broad standardize claims as it promotes =
interoperability of RATS.<o:p class=3D""></o:p></div><div style=3D"margin:=
 0in 0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D""><o:p class=3D"">&nbsp;</o:p></span></div><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D"">Sounds good to me.&nbsp;&nbsp; Consider this a request to add =
some way to express =E2=80=9Cvendor id=E2=80=9D, =E2=80=9Cmodel=E2=80=9D =
(or =E2=80=9Cclass=E2=80=9D or whatever you want to call it), and =
=E2=80=9Cversion=E2=80=9D as claims that can be applied in claimsets at =
various layers.&nbsp;&nbsp; I glanced at the PR you referenced and it =
seems to be a chip-specific version, not a generic version claim that =
can be used at multiple layers, so is not sufficient to meet the TEEP =
arch draft=E2=80=99s requirements, we still need other claims added.<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;" =
class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D"">Thanks!<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;" =
class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D"">Dave<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D"">LL<o:p class=3D""></o:p></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: =
12pt; font-family: &quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div></div><div style=3D"margin: 0in 0in =
0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><br class=3D""><br class=3D""><o:p =
class=3D""></o:p></div><blockquote style=3D"margin-top: 5pt; =
margin-bottom: 5pt;" class=3D""><div class=3D""><div class=3D""><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D""><span style=3D"font-size: =
11pt; font-family: Calibri, sans-serif;" class=3D"">&nbsp;<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D"">Dave<o:p =
class=3D""></o:p></span></div></div><div style=3D"margin: 0in 0in =
0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><span style=3D"font-size: 9pt; =
font-family: Helvetica, sans-serif;" =
class=3D"">_______________________________________________<br =
class=3D"">RATS mailing list<br class=3D""></span><a =
href=3D"mailto:RATS@ietf.org" style=3D"color: purple; text-decoration: =
underline;" class=3D""><span style=3D"font-size: 9pt; font-family: =
Helvetica, sans-serif; color: rgb(149, 79, 114);" =
class=3D"">RATS@ietf.org</span></a><span style=3D"font-size: 9pt; =
font-family: Helvetica, sans-serif;" class=3D""><br class=3D""></span><a =
href=3D"https://nam06.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%=
2Fwww.ietf.org%2Fmailman%2Flistinfo%2Frats&amp;data=3D04%7C01%7Cdthaler%40=
microsoft.com%7Cab1ee7788f1f4d449c5508d87aaa3006%7C72f988bf86f141af91ab2d7=
cd011db47%7C1%7C0%7C637394218658895685%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4=
wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=3D=
O5LJZBw%2B6huYU7BrNSgOUQNw2H5uoDGwZj09%2FPghKrI%3D&amp;reserved=3D0" =
style=3D"color: purple; text-decoration: underline;" class=3D""><span =
style=3D"font-size: 9pt; font-family: Helvetica, sans-serif; color: =
rgb(149, 79, 114);" =
class=3D"">https://www.ietf.org/mailman/listinfo/rats</span></a><o:p =
class=3D""></o:p></div></div></blockquote></div><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div></div></div></div></blockquote></div><br =
class=3D""></div></body></html>=

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Archived-At: <https://mailarchive.ietf.org/arch/msg/teep/bIzREyLvjnzATq2Gaa0hDbVIWbI>
Subject: Re: [Teep] [Rats] EAT claims needed by TEEP
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Subject: Re: [Teep] [Rats] EAT claims needed by TEEP
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From: Raymond Mamattah <mamattah.raymond@gmail.com>
Date: Fri, 16 Oct 2020 23:52:11 +0000
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Subject: Re: [Teep] [Din] Constrained Node/Network Cluster @ IETF109: DRAFT AGENDA
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Hi Carsten,

>From the draft agenda, I can see there are various exciting WG I would love
to join.

What is the process of joining the WG please.

Regards,

Raymond Mamattah
Accra, Ghana
https://www.linkedin.com/in/raymond-selorm-mamattah-02637610

On Fri, Oct 16, 2020, 11:42 PM Carsten Bormann <cabo@tzi.org> wrote:

> Here is my usual eclectic condensed agenda based on the DRAFT AGENDA
> for IETF109.  Remember that there is still quite some potential for
> changes.
>
> The conflicts that meet the eye this time seem to impact generalists only=
.
> Great scheduling job!
>
> All times *on my agenda* are in UTC (the default page is UTC+0700).
> https://datatracker.ietf.org/meeting/agenda-utc might be handy.
> Note that both EU and US are on winter time (standard time) then.
>
> Gr=C3=BC=C3=9Fe, Carsten
>
> MONDAY, November 9, 2020
>
> 0500-0700  Hackathon Kickoff
> Rm 1            GEN     hackathon       Hackathon
>
> FRIDAY, November 13, 2020
>
> 0500-0700  Hackathon Closing
> Rm 1            GEN     hackathon       Hackathon
>
> MONDAY, November 16, 2020
>
> 0500-0700  Session I
> Rm 1            ART     dispatch        Dispatch WG - Joint with ARTAREA
> Rm 3            IRTF    qirg    Quantum Internet Research Group
> Rm 5            RTG     raw     Reliable and Available Wireless WG
> Rm 6            SEC *** lake    Lightweight Authenticated Key Exchange WG
>
> 0730-0830  Session II
> Rm 3            INT     add     Adaptive DNS Discovery WG
> Rm 4            IRTF    maprg   Measurement and Analysis for Protocols
> Rm 7            SEC *** cose    CBOR Object Signing and Encryption WG
>
> 0900-1100  Session III
> Rm 1            ART     jsonpath        JSON Path WG
> Rm 6            SEC     secdispatch     Security Dispatch WG
> Rm 7            TSV     tsvwg   Transport Area Working Group WG
>
> TUESDAY, November 17, 2020
>
> 0500-0700  Session I
> Rm 1            ART *** core    Constrained RESTful Environments WG
> Rm 2            INT     6man    IPv6 Maintenance WG
> Rm 7            SEC     gnap    Grant Negotiation and Authorization
> Protocol WG
>
> 0730-0830  Session II
> Rm 5            RTG     babel   Babel routing protocol WG
> Rm 6            SEC     tls     Transport Layer Security WG
>
> 0900-1100  Session III
> Rm 1            ART *** asdf    A Semantic Definition Format for Data and
> Interactions of Things WG
> Rm 2            IRTF    irtfopen        IRTF Open Meeting
> Rm 4            RTG     apn     Application-aware Networking BOF
> Rm 7            SEC *** rats    Remote ATtestation ProcedureS WG
>
> WEDNESDAY, November 18, 2020
>
> 0500-0700  Session I
> Rm 3            INT     madinas MAC Address Device Identification for
> Network and Application Services BOF
> Rm 5            RTG     bier    Bit Indexed Explicit Replication WG
> Rm 7            SEC *** ace     Authentication and Authorization for
> Constrained Environments WG
> Rm 8            TSV     quic    QUIC WG
>
> 0730-0830  Session II
> Rm 3            INT *** 6lo     IPv6 over Networks of Resource-constraine=
d
> Nodes WG
> Rm 4            INT *** drip    Drone Remote ID Protocol WG
> Rm 7            SEC *** teep    Trusted Execution Environment Provisionin=
g
> WG
> Rm 8            TSV     tsvwg   Transport Area Working Group WG
>
> THURSDAY, November 19, 2020
>
> 0500-0700  Session I
> Rm 3            IRTF    coinrg  Computing in the Network Research Group
> Rm 7            SEC     saag    Security Area Open Meeting
>
> 0730-0830  Session II
> Rm 1            ART *** cbor    Concise Binary Object Representation
> Maintenance and Extensions WG
> Rm 2            INT     intarea Internet Area Working Group WG
> Rm 3            RTG     detnet  Deterministic Networking WG
> Rm 5            SEC     acme    Automated Certificate Management
> Environment WG
>
> 0900-1100  Session III
> Rm 4            OPS     v6ops   IPv6 Operations WG
> Rm 6            RTG *** roll    Routing Over Low power and Lossy networks
> WG
> Rm 7            SEC     mls     Messaging Layer Security WG
> Rm 8            SEC *** rats    Remote ATtestation ProcedureS WG
>
> FRIDAY, November 20, 2020
>
> 0500-0700  Session I
> Rm 2            INT     add     Adaptive DNS Discovery WG
> Rm 6            RTG     rift    Routing In Fat Trees WG
> Rm 7            SEC     emu     EAP Method Update WG
>
> 0730-0830  Session II
> Rm 1            ART     httpapi Building Blocks for HTTP APIs WG
> Rm 2            INT *** lwig    Light-Weight Implementation Guidance WG
> Rm 3            OPS     anima   Autonomic Networking Integrated Model and
> Approach WG
> Rm 6            SEC *** suit    Software Updates for Internet of Things W=
G
> Rm 7            TSV     tsvarea Transport Area Open Meeting
>
> 0900-1100  Session III
> Rm 1            ART *** core    Constrained RESTful Environments WG
> Rm 2            INT     6man    IPv6 Maintenance WG
> Rm 4            IRTF    cfrg    Crypto Forum
> Rm 7            TSV     masque  Multiplexed Application Substrate over
> QUIC Encryption WG
>
>
> _______________________________________________
> Din mailing list
> Din@irtf.org
> https://www.irtf.org/mailman/listinfo/din
>

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<div dir=3D"auto">Hi=C2=A0Carsten,<div dir=3D"auto"><br></div><div dir=3D"a=
uto">From the draft agenda, I can see there are various exciting WG I would=
 love to join.</div><div dir=3D"auto"><br></div><div dir=3D"auto">What is t=
he process of joining the WG please.</div><div dir=3D"auto"><br></div><div =
dir=3D"auto">Regards,<br><div dir=3D"auto"><br><div data-smartmail=3D"gmail=
_signature" dir=3D"auto">Raymond Mamattah<br>Accra, Ghana<br><a href=3D"htt=
ps://www.linkedin.com/in/raymond-selorm-mamattah-02637610">https://www.link=
edin.com/in/raymond-selorm-mamattah-02637610</a></div></div></div></div><br=
><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Fri, O=
ct 16, 2020, 11:42 PM Carsten Bormann &lt;<a href=3D"mailto:cabo@tzi.org">c=
abo@tzi.org</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=
=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Here is =
my usual eclectic condensed agenda based on the DRAFT AGENDA<br>
for IETF109.=C2=A0 Remember that there is still quite some potential for<br=
>
changes.<br>
<br>
The conflicts that meet the eye this time seem to impact generalists only.<=
br>
Great scheduling job!<br>
<br>
All times *on my agenda* are in UTC (the default page is UTC+0700).<br>
<a href=3D"https://datatracker.ietf.org/meeting/agenda-utc" rel=3D"noreferr=
er noreferrer" target=3D"_blank">https://datatracker.ietf.org/meeting/agend=
a-utc</a> might be handy.<br>
Note that both EU and US are on winter time (standard time) then.<br>
<br>
Gr=C3=BC=C3=9Fe, Carsten<br>
<br>
MONDAY, November 9, 2020<br>
<br>
0500-0700=C2=A0 Hackathon Kickoff<br>
Rm 1=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 GEN=C2=A0 =C2=A0 =C2=A0hackat=
hon=C2=A0 =C2=A0 =C2=A0 =C2=A0Hackathon<br>
<br>
FRIDAY, November 13, 2020<br>
<br>
0500-0700=C2=A0 Hackathon Closing<br>
Rm 1=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 GEN=C2=A0 =C2=A0 =C2=A0hackat=
hon=C2=A0 =C2=A0 =C2=A0 =C2=A0Hackathon<br>
<br>
MONDAY, November 16, 2020<br>
<br>
0500-0700=C2=A0 Session I<br>
Rm 1=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 ART=C2=A0 =C2=A0 =C2=A0dispat=
ch=C2=A0 =C2=A0 =C2=A0 =C2=A0 Dispatch WG - Joint with ARTAREA<br>
Rm 3=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 IRTF=C2=A0 =C2=A0 qirg=C2=A0 =
=C2=A0 Quantum Internet Research Group<br>
Rm 5=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 RTG=C2=A0 =C2=A0 =C2=A0raw=C2=
=A0 =C2=A0 =C2=A0Reliable and Available Wireless WG<br>
Rm 6=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 SEC *** lake=C2=A0 =C2=A0 Lig=
htweight Authenticated Key Exchange WG<br>
<br>
0730-0830=C2=A0 Session II<br>
Rm 3=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 INT=C2=A0 =C2=A0 =C2=A0add=C2=
=A0 =C2=A0 =C2=A0Adaptive DNS Discovery WG<br>
Rm 4=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 IRTF=C2=A0 =C2=A0 maprg=C2=A0=
 =C2=A0Measurement and Analysis for Protocols<br>
Rm 7=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 SEC *** cose=C2=A0 =C2=A0 CBO=
R Object Signing and Encryption WG<br>
<br>
0900-1100=C2=A0 Session III<br>
Rm 1=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 ART=C2=A0 =C2=A0 =C2=A0jsonpa=
th=C2=A0 =C2=A0 =C2=A0 =C2=A0 JSON Path WG<br>
Rm 6=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 SEC=C2=A0 =C2=A0 =C2=A0secdis=
patch=C2=A0 =C2=A0 =C2=A0Security Dispatch WG<br>
Rm 7=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 TSV=C2=A0 =C2=A0 =C2=A0tsvwg=
=C2=A0 =C2=A0Transport Area Working Group WG<br>
<br>
TUESDAY, November 17, 2020<br>
<br>
0500-0700=C2=A0 Session I<br>
Rm 1=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 ART *** core=C2=A0 =C2=A0 Con=
strained RESTful Environments WG<br>
Rm 2=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 INT=C2=A0 =C2=A0 =C2=A06man=
=C2=A0 =C2=A0 IPv6 Maintenance WG<br>
Rm 7=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 SEC=C2=A0 =C2=A0 =C2=A0gnap=
=C2=A0 =C2=A0 Grant Negotiation and Authorization Protocol WG<br>
<br>
0730-0830=C2=A0 Session II<br>
Rm 5=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 RTG=C2=A0 =C2=A0 =C2=A0babel=
=C2=A0 =C2=A0Babel routing protocol WG<br>
Rm 6=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 SEC=C2=A0 =C2=A0 =C2=A0tls=C2=
=A0 =C2=A0 =C2=A0Transport Layer Security WG<br>
<br>
0900-1100=C2=A0 Session III<br>
Rm 1=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 ART *** asdf=C2=A0 =C2=A0 A S=
emantic Definition Format for Data and Interactions of Things WG<br>
Rm 2=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 IRTF=C2=A0 =C2=A0 irtfopen=C2=
=A0 =C2=A0 =C2=A0 =C2=A0 IRTF Open Meeting<br>
Rm 4=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 RTG=C2=A0 =C2=A0 =C2=A0apn=C2=
=A0 =C2=A0 =C2=A0Application-aware Networking BOF<br>
Rm 7=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 SEC *** rats=C2=A0 =C2=A0 Rem=
ote ATtestation ProcedureS WG<br>
<br>
WEDNESDAY, November 18, 2020<br>
<br>
0500-0700=C2=A0 Session I<br>
Rm 3=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 INT=C2=A0 =C2=A0 =C2=A0madina=
s MAC Address Device Identification for Network and Application Services BO=
F<br>
Rm 5=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 RTG=C2=A0 =C2=A0 =C2=A0bier=
=C2=A0 =C2=A0 Bit Indexed Explicit Replication WG<br>
Rm 7=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 SEC *** ace=C2=A0 =C2=A0 =C2=
=A0Authentication and Authorization for Constrained Environments WG<br>
Rm 8=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 TSV=C2=A0 =C2=A0 =C2=A0quic=
=C2=A0 =C2=A0 QUIC WG<br>
<br>
0730-0830=C2=A0 Session II<br>
Rm 3=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 INT *** 6lo=C2=A0 =C2=A0 =C2=
=A0IPv6 over Networks of Resource-constrained Nodes WG<br>
Rm 4=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 INT *** drip=C2=A0 =C2=A0 Dro=
ne Remote ID Protocol WG<br>
Rm 7=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 SEC *** teep=C2=A0 =C2=A0 Tru=
sted Execution Environment Provisioning WG<br>
Rm 8=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 TSV=C2=A0 =C2=A0 =C2=A0tsvwg=
=C2=A0 =C2=A0Transport Area Working Group WG<br>
<br>
THURSDAY, November 19, 2020<br>
<br>
0500-0700=C2=A0 Session I<br>
Rm 3=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 IRTF=C2=A0 =C2=A0 coinrg=C2=
=A0 Computing in the Network Research Group<br>
Rm 7=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 SEC=C2=A0 =C2=A0 =C2=A0saag=
=C2=A0 =C2=A0 Security Area Open Meeting<br>
<br>
0730-0830=C2=A0 Session II<br>
Rm 1=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 ART *** cbor=C2=A0 =C2=A0 Con=
cise Binary Object Representation Maintenance and Extensions WG<br>
Rm 2=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 INT=C2=A0 =C2=A0 =C2=A0intare=
a Internet Area Working Group WG<br>
Rm 3=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 RTG=C2=A0 =C2=A0 =C2=A0detnet=
=C2=A0 Deterministic Networking WG<br>
Rm 5=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 SEC=C2=A0 =C2=A0 =C2=A0acme=
=C2=A0 =C2=A0 Automated Certificate Management Environment WG<br>
<br>
0900-1100=C2=A0 Session III<br>
Rm 4=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 OPS=C2=A0 =C2=A0 =C2=A0v6ops=
=C2=A0 =C2=A0IPv6 Operations WG<br>
Rm 6=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 RTG *** roll=C2=A0 =C2=A0 Rou=
ting Over Low power and Lossy networks WG<br>
Rm 7=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 SEC=C2=A0 =C2=A0 =C2=A0mls=C2=
=A0 =C2=A0 =C2=A0Messaging Layer Security WG<br>
Rm 8=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 SEC *** rats=C2=A0 =C2=A0 Rem=
ote ATtestation ProcedureS WG<br>
<br>
FRIDAY, November 20, 2020<br>
<br>
0500-0700=C2=A0 Session I<br>
Rm 2=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 INT=C2=A0 =C2=A0 =C2=A0add=C2=
=A0 =C2=A0 =C2=A0Adaptive DNS Discovery WG<br>
Rm 6=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 RTG=C2=A0 =C2=A0 =C2=A0rift=
=C2=A0 =C2=A0 Routing In Fat Trees WG<br>
Rm 7=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 SEC=C2=A0 =C2=A0 =C2=A0emu=C2=
=A0 =C2=A0 =C2=A0EAP Method Update WG<br>
<br>
0730-0830=C2=A0 Session II<br>
Rm 1=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 ART=C2=A0 =C2=A0 =C2=A0httpap=
i Building Blocks for HTTP APIs WG<br>
Rm 2=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 INT *** lwig=C2=A0 =C2=A0 Lig=
ht-Weight Implementation Guidance WG<br>
Rm 3=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 OPS=C2=A0 =C2=A0 =C2=A0anima=
=C2=A0 =C2=A0Autonomic Networking Integrated Model and Approach WG<br>
Rm 6=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 SEC *** suit=C2=A0 =C2=A0 Sof=
tware Updates for Internet of Things WG<br>
Rm 7=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 TSV=C2=A0 =C2=A0 =C2=A0tsvare=
a Transport Area Open Meeting<br>
<br>
0900-1100=C2=A0 Session III<br>
Rm 1=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 ART *** core=C2=A0 =C2=A0 Con=
strained RESTful Environments WG<br>
Rm 2=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 INT=C2=A0 =C2=A0 =C2=A06man=
=C2=A0 =C2=A0 IPv6 Maintenance WG<br>
Rm 4=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 IRTF=C2=A0 =C2=A0 cfrg=C2=A0 =
=C2=A0 Crypto Forum<br>
Rm 7=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 TSV=C2=A0 =C2=A0 =C2=A0masque=
=C2=A0 Multiplexed Application Substrate over QUIC Encryption WG<br>
<br>
<br>
_______________________________________________<br>
Din mailing list<br>
<a href=3D"mailto:Din@irtf.org" target=3D"_blank" rel=3D"noreferrer">Din@ir=
tf.org</a><br>
<a href=3D"https://www.irtf.org/mailman/listinfo/din" rel=3D"noreferrer nor=
eferrer" target=3D"_blank">https://www.irtf.org/mailman/listinfo/din</a><br=
>
</blockquote></div>

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Subject: Re: [Teep] [Rats] EAT claims needed by TEEP
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> On Oct 28, 2020, at 11:14 AM, Simon Frost <Simon.Frost@arm.com> wrote:
>=20
> Note that some of the Arm team will be attending the upcoming =
hackathon and had been discussing doing some work there on describing =
components with CoSWID via EAT. This builds on some implementation work =
already completed as part of an Arm project that will shortly be =
upstreamed.
> =20
> The PSA EAT profile originally introduced a hardware version based on =
an EAN-13. This was used as a reference to a general set of hardware in =
a certification scheme. Further work has shown this format is not =
suitable and it has will be deprecated in a future releases of the =
profile. The PSA profile also contains an =E2=80=98ImplementationID=E2=80=99=
 claim (byte string of sufficient size to hold a SHA2 hash) which is =
intended to be used as a much more specific identifier of a hardware =
group. The intent here is that reference values for an ImplementationID =
can be known by a verifier to assist appraisal policy.

I think we want to have a claim that is clearly and explicitly a HW =
version. There can be additional claims to look up reference values or =
other stuff Verifiers need. All claims are optional so, implementations =
that only use something like ImplementID can leave out HW version.

I think we should keep EAN-13 as an option, even though it won=E2=80=99t =
work for everyone.

In addition to EAN-13 versions, we can just define byte string, or we =
can go a lot further by reusing the version scheme from CoSWID. Here=E2=80=
=99s some of the types.

   +-------+-------------------------+--------------------------------+
   | Index | Version Scheme Name     | Definition                     |
   +=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=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D+
   | 1     | multipartnumeric        | Numbers separated by dots,     |
   |       |                         | where the numbers are          |
   |       |                         | interpreted as integers (e.g., |
   |       |                         | 1.2.3, 1.4.5, 1.2.3.4.5.6.7)   |
   +-------+-------------------------+--------------------------------+
   | 2     | multipartnumeric+suffix | Numbers separated by dots,     |
   |       |                         | where the numbers are          |
   |       |                         | interpreted as integers with   |
   |       |                         | an additional textual suffix   |
   |       |                         | (e.g., 1.2.3a)                 |
   +-------+-------------------------+--------------------------------+
   | 3     | alphanumeric            | Strictly a string, sorting is  |
   |       |                         | done alphanumerically          |
   +-------+-------------------------+--------------------------------+
   | 4     | decimal                 | A floating point number (e.g., |
   |       |                         | 1.25 is less than 1.3)         |
   +-------+-------------------------+--------------------------------+
   | 16384 | semver                  | Follows the [SEMVER =
<https://tools.ietf.org/html/draft-ietf-sacm-coswid-15#ref-SEMVER>]      =
     |
   |       |                         | specification                  |
   +-------+-------------------------+--------------------------------+

My understanding is that they are always encoded as CBOR text strings, =
so floating-point doesn=E2=80=99t mean #7.25 or such.

LL



> =20
> Thanks
> Simon
> =20
> From: Laurence Lundblade <lgl@island-resort.com =
<mailto:lgl@island-resort.com>>=20
> Sent: 27 October 2020 20:45
> To: Dave Thaler <dthaler@microsoft.com <mailto:dthaler@microsoft.com>>
> Cc: rats@ietf.org <mailto:rats@ietf.org>; teep <teep@ietf.org =
<mailto:teep@ietf.org>>
> Subject: Re: [Rats] EAT claims needed by TEEP
> =20
> CoSWID should cover all the identification of vendors, models, =
versions and stuff for SW. If it doesn=E2=80=99t talk to Henk about =
fixes to CoSWID. :-)
> =20
> For HW, there is OEMID and recently proposed chip version, board =
version and device version. It seems like we need a model number claim =
for HW. I will work on that.
> =20
> Seems like submodules would be used to organize claims for layered =
attestation and all of the above claims can occur in any submodule they =
need to.
> =20
> Does this mostly cover it?=20
> =20
> I worry that the HW claims are bit too rigid in their use of EAN-13 =
and IEEE registries. Might need to do something about that.
> =20
> LL
> =20
>=20
>=20
> On Oct 27, 2020, at 1:26 PM, Dave Thaler <dthaler@microsoft.com =
<mailto:dthaler@microsoft.com>> wrote:
> =20
> Inline below=E2=80=A6
> =20
> From: Laurence Lundblade <lgl@island-resort.com =
<mailto:lgl@island-resort.com>>=20
> Sent: Tuesday, October 27, 2020 11:57 AM
> To: Dave Thaler <dthaler@microsoft.com <mailto:dthaler@microsoft.com>>
> Cc: rats@ietf.org <mailto:rats@ietf.org>; teep <teep@ietf.org =
<mailto:teep@ietf.org>>
> Subject: Re: [Rats] EAT claims needed by TEEP
> =20
> Personally, I think attestation of TEE=E2=80=99s is pretty important =
and should be handled well in EAT. So I=E2=80=99m interested in working =
on and adding claims for this to EAT.
> =20
> After reading section 7.1 in TEEP architecture, it does seem like =
there some work to do here to get to specific standardized interoperable =
claims.
> =20
> More comments below.
>=20
>=20
>=20
> On Oct 26, 2020, at 3:15 PM, Dave Thaler =
<dthaler=3D40microsoft.com@dmarc.ietf.org =
<mailto:dthaler=3D40microsoft.com@dmarc.ietf.org>> wrote:
> =20
> As discussed in previous IETF meetings, if there are claims beyond the =
base set that
> other WGs need, they can be specified by the other WGs with review by =
RATS.
> =20
> The TEEP WG needs the following in EATs and I am not sure whether they =
can be
> covered by existing claims or whether TEEP-specific claims are needed. =
 From
> section 7.1 of draft-ietf-teep-architecture:
> =20
> =C3=98     -  Device Identifying Information: TEEP attestations may =
need to
> =C3=98        uniquely identify a device to the TAM.  Unique device
> =C3=98        identification allows the TAM to provide services to the =
device,
> =C3=98        such as managing installed TAs, and providing =
subscriptions to
> =C3=98        services, and locating device-specific keying material =
to
> =C3=98        communicate with or authenticate the device.
> =20
> I believe the Universal Entity ID Claim (ueid) is claim that meets the =
above requirement.
> But the TEEP arch then goes on to say:
> =20
> =C3=98        In some use cases it
> =C3=98        may be sufficient to identify only the class of the =
device.  The
> =C3=98        security and privacy requirements regarding device =
identification
> =C3=98        will vary with the type of TA provisioned to the TEE.
> Which EAT claim contains the device class? The closest thing I see is =
OEM Identification by IEEE (oemid)
> but I am not sure that is sufficient since it's only the OEM not the =
device class from that OEM.
> This doesn=E2=80=99t seem like something that should be TEEP specific =
though, so can someone tell me how to
> represent device class using the claims in the EAT spec?
> =20
> I don=E2=80=99t think the OEMID, UEID or other should be (ab)used  to =
represent device class. That would result in them being less reliable =
and useful in a generic sense. We should come up with a new claim.
> =20
> +1
> =20
> We can define a claim to be  the device class and make it a byte =
string like a UEID, but I think we have to go further to make it useful =
as an interoperable standardize claim. There has to be some method for =
the classification. TrustZone vs hypervisor based? Fast vs slow? Has a =
protected mode kernel and TAs? The TEEP document doesn=E2=80=99t say. =
This seems problematic without a classification scheme.
> =20
> [DT] I=E2=80=99m not sure we need a classification scheme, at least =
for TEEP.  A simple device class byte string as you suggest would =
suffice in my opinion.
> =20
> I wonder if the intent is more about grouping, in which case we can =
define a GEID (Group Entity ID) that looks a lot like a UEID. That seems =
useful and sensible to me. It is not about classification based on any =
characteristics. It lines up with the privacy preserving technique of =
one key per 100,000 devices.
> =20
> =C3=98     -  TEE Identifying Information: The type of TEE that =
generated this
> =C3=98        attestation must be identified, including version =
identification
> =C3=98        information such as the hardware, firmware, and software =
version
> =C3=98        of the TEE, as applicable by the TEE type.  TEE =
manufacturer
> =C3=98        information for the TEE is required in order to =
disambiguate the
> =C3=98        same TEE type created by different manufacturers and =
address
> =C3=98        considerations around manufacturer provisioning, keying =
and
> =C3=98        support for the TEE.
> =20
> Similarly for this requirement, the closest thing I see is Origination =
Claim (origination) but I am not sure
> that is sufficient since it's just the manufacturer not the "version =
identification information such as the
> hardware, firmware, and software version of the TEE=E2=80=9D
> =20
> Definitely not origination claim.=20
> =20
> +1
> =20
> The intent of it something like Endorser identification and I think it =
should be replaced by an Endorser/X.509 cert URL.
> =20
> I would say, this is a combination of claims
> =20
> It=E2=80=99s just used:
> 1)     For a Verifier in appraising the evidence (nothing TEEP =
specific here, appraisal policy can involve any claim), and
> 2)     To be used by a TAM to decide which TA=E2=80=99s apply to the =
TEE.  In that sense it=E2=80=99s just like any other vendor id + device =
class for any non TEE, and I believe if there were a byte string for =
device class as you suggest that would be sufficient in my opinion.
> =20
> Keeping in mind the =E2=80=9Clayered attestation=E2=80=9D concept in =
the arch doc, as long as we have a claimset per layer, then I think the =
same =E2=80=9Cvendor id=E2=80=9D and =E2=80=9Cclass=E2=80=9D claims that =
would apply to any device could be reused for the TEE, and reused for =
describing each layer.  E.g., a =E2=80=9Cversion=E2=80=9D claim would =
apply at the hardware layer and be the hardware version, at the firmware =
layer and be a firmware version, at the OS layer and be an OS version, =
etc.
> =20
> =20
> I=E2=80=99ve just added a PR =
<https://nam06.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%2Fgithu=
b.com%2Fietf-rats-wg%2Feat%2Fpull%2F68&data=3D04%7C01%7Cdthaler%40microsof=
t.com%7Cab1ee7788f1f4d449c5508d87aaa3006%7C72f988bf86f141af91ab2d7cd011db4=
7%7C1%7C0%7C637394218658895685%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDA=
iLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=3DJyNCTwUJvkC=
Pk3H9uYmD0BLfUXPu6vhnQomkIqiqiUM%3D&reserved=3D0> for HW version claims.
> =20
> The intent for SW version claims is to use CoSWID. We should probably =
create some examples to see if it can represent what TEEP wants to =
represent.
> =20
> Agree this sounds promising.
> =20
> The paragraph mentions =E2=80=9Ctype of TEE=E2=80=9D. I=E2=80=99m not =
sure what is intended. I don=E2=80=99t know of any common taxonomy for =
classifying TEEs.
> =20
> A unique identifier is sufficient in my view, no =E2=80=9Cclassification=
=E2=80=9D or =E2=80=9Ctaxonomy=E2=80=9D is required by anything that the =
TEEP WG has discussed to date, as far as I know.
>=20
>=20
> Should the TEEP WG define TEEP-specific claims for such information?
> =20
> I=E2=80=99d like to see most of them go into EAT unless they are super =
specific to TEEP (TEEP not TEEs). I think there is value in broad =
standardize claims as it promotes interoperability of RATS.
> =20
> Sounds good to me.   Consider this a request to add some way to =
express =E2=80=9Cvendor id=E2=80=9D, =E2=80=9Cmodel=E2=80=9D (or =
=E2=80=9Cclass=E2=80=9D or whatever you want to call it), and =
=E2=80=9Cversion=E2=80=9D as claims that can be applied in claimsets at =
various layers.   I glanced at the PR you referenced and it seems to be =
a chip-specific version, not a generic version claim that can be used at =
multiple layers, so is not sufficient to meet the TEEP arch draft=E2=80=99=
s requirements, we still need other claims added.
> =20
> Thanks!
> Dave
> =20
> LL
> =20
>=20
>=20
>=20
> =20
> Dave
> _______________________________________________
> RATS mailing list
> RATS@ietf.org <mailto:RATS@ietf.org>
> https://www.ietf.org/mailman/listinfo/rats =
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etf.org%2Fmailman%2Flistinfo%2Frats&data=3D04%7C01%7Cdthaler%40microsoft.c=
om%7Cab1ee7788f1f4d449c5508d87aaa3006%7C72f988bf86f141af91ab2d7cd011db47%7=
C1%7C0%7C637394218658895685%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLC=
JQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=3DO5LJZBw%2B6huY=
U7BrNSgOUQNw2H5uoDGwZj09%2FPghKrI%3D&reserved=3D0>
> =20
> =20
> IMPORTANT NOTICE: The contents of this email and any attachments are =
confidential and may also be privileged. If you are not the intended =
recipient, please notify the sender immediately and do not disclose the =
contents to any other person, use it for any purpose, or store or copy =
the information in any medium. Thank you.


--Apple-Mail=_177CD464-4436-4B17-A712-A2657F621E93
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html;
	charset=utf-8

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D""><br =
class=3D""><div><blockquote type=3D"cite" class=3D""><div class=3D"">On =
Oct 28, 2020, at 11:14 AM, Simon Frost &lt;<a =
href=3D"mailto:Simon.Frost@arm.com" class=3D"">Simon.Frost@arm.com</a>&gt;=
 wrote:</div><br class=3D"Apple-interchange-newline"><div class=3D""><div =
class=3D"WordSection1" style=3D"page: WordSection1; caret-color: rgb(0, =
0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none;"><div style=3D"margin: 0cm; font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D""><span lang=3D"EN-GB" =
class=3D"">Note that some of the Arm team will be attending the upcoming =
hackathon and had been discussing doing some work there on describing =
components with CoSWID via EAT. This builds on some implementation work =
already completed as part of an Arm project that will shortly be =
upstreamed.<o:p class=3D""></o:p></span></div><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
lang=3D"EN-GB" class=3D""><o:p class=3D"">&nbsp;</o:p></span></div><div =
style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><span lang=3D"EN-GB" class=3D"">The PSA EAT =
profile originally introduced a hardware version based on an EAN-13. =
This was used as a reference to a general set of hardware in a =
certification scheme. Further work has shown this format is not suitable =
and it has will be deprecated in a future releases of the profile. The =
PSA profile also contains an =E2=80=98ImplementationID=E2=80=99 claim =
(byte string of sufficient size to hold a SHA2 hash) which is intended =
to be used as a much more specific identifier of a hardware group. The =
intent here is that reference values for an ImplementationID can be =
known by a verifier to assist appraisal =
policy.</span></div></div></div></blockquote><div><br =
class=3D""></div><div>I think we want to have a claim that is clearly =
and explicitly a HW version. There can be additional claims to look up =
reference values or other stuff Verifiers need. All claims are optional =
so, implementations that only use something like ImplementID can leave =
out HW version.</div><div><br class=3D""></div><div>I think we should =
keep EAN-13 as an option, even though it won=E2=80=99t work for =
everyone.</div><div><br class=3D""></div><div>In addition to EAN-13 =
versions, we can just define byte string, or we can go a lot further by =
reusing the version scheme from CoSWID. Here=E2=80=99s some of the =
types.</div><div><br class=3D""></div><div><pre class=3D"newpage" =
style=3D"font-size: 13.333333015441895px; margin-top: 0px; =
margin-bottom: 0px; break-before: page;">   =
+-------+-------------------------+--------------------------------+
   | Index | Version Scheme Name     | Definition                     |
   +=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=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D+
   | 1     | multipartnumeric        | Numbers separated by dots,     |
   |       |                         | where the numbers are          |
   |       |                         | interpreted as integers (e.g., |
   |       |                         | 1.2.3, 1.4.5, 1.2.3.4.5.6.7)   |
   +-------+-------------------------+--------------------------------+
   | 2     | multipartnumeric+suffix | Numbers separated by dots,     |
   |       |                         | where the numbers are          |
   |       |                         | interpreted as integers with   |
   |       |                         | an additional textual suffix   |
   |       |                         | (e.g., 1.2.3a)                 |
   +-------+-------------------------+--------------------------------+
   | 3     | alphanumeric            | Strictly a string, sorting is  |
   |       |                         | done alphanumerically          |
   +-------+-------------------------+--------------------------------+
   | 4     | decimal                 | A floating point number (e.g., |
   |       |                         | 1.25 is less than 1.3)         |
   +-------+-------------------------+--------------------------------+
   | 16384 | semver                  | Follows the [<a =
href=3D"https://tools.ietf.org/html/draft-ietf-sacm-coswid-15#ref-SEMVER" =
title=3D"&quot;Semantic Versioning 2.0.0&quot;" class=3D"">SEMVER</a>]   =
        |
   |       |                         | specification                  |
   =
+-------+-------------------------+--------------------------------+</pre>=
<div class=3D""><br class=3D""></div></div><div>My understanding is that =
they are always encoded as CBOR text strings, so floating-point =
doesn=E2=80=99t mean #7.25 or such.</div><div><br =
class=3D""></div><div>LL</div><div><br class=3D""></div><div><br =
class=3D""></div><br class=3D""><blockquote type=3D"cite" class=3D""><div =
class=3D""><div class=3D"WordSection1" style=3D"page: WordSection1; =
caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; text-decoration: none;"><div =
style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><span lang=3D"EN-GB" class=3D""><o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0cm; font-size: =
11pt; font-family: Calibri, sans-serif;" class=3D""><span lang=3D"EN-GB" =
class=3D""><o:p class=3D"">&nbsp;</o:p></span></div><div style=3D"margin: =
0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
lang=3D"EN-GB" class=3D"">Thanks<o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><span lang=3D"EN-GB" class=3D"">Simon<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0cm; font-size: =
11pt; font-family: Calibri, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div><div class=3D""><div style=3D"border-style: =
solid none none; border-top-width: 1pt; border-top-color: rgb(225, 225, =
225); padding: 3pt 0cm 0cm;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><b =
class=3D""><span lang=3D"EN-US" class=3D"">From:</span></b><span =
lang=3D"EN-US" class=3D""><span =
class=3D"Apple-converted-space">&nbsp;</span>Laurence Lundblade &lt;<a =
href=3D"mailto:lgl@island-resort.com" style=3D"color: blue; =
text-decoration: underline;" class=3D"">lgl@island-resort.com</a>&gt;<span=
 class=3D"Apple-converted-space">&nbsp;</span><br class=3D""><b =
class=3D"">Sent:</b><span class=3D"Apple-converted-space">&nbsp;</span>27 =
October 2020 20:45<br class=3D""><b class=3D"">To:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>Dave Thaler &lt;<a =
href=3D"mailto:dthaler@microsoft.com" style=3D"color: blue; =
text-decoration: underline;" class=3D"">dthaler@microsoft.com</a>&gt;<br =
class=3D""><b class=3D"">Cc:</b><span =
class=3D"Apple-converted-space">&nbsp;</span><a =
href=3D"mailto:rats@ietf.org" style=3D"color: blue; text-decoration: =
underline;" class=3D"">rats@ietf.org</a>; teep &lt;<a =
href=3D"mailto:teep@ietf.org" style=3D"color: blue; text-decoration: =
underline;" class=3D"">teep@ietf.org</a>&gt;<br class=3D""><b =
class=3D"">Subject:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>Re: [Rats] EAT claims =
needed by TEEP<o:p class=3D""></o:p></span></div></div></div><div =
style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><o:p class=3D"">&nbsp;</o:p></div><div =
class=3D""><div style=3D"margin: 0cm; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D"">CoSWID should cover all the =
identification of vendors, models, versions and stuff for SW. If it =
doesn=E2=80=99t talk to Henk about fixes to CoSWID. :-)<o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div></div><div class=3D""><div style=3D"margin: =
0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=3D"">For =
HW, there is OEMID and recently proposed chip version, board version and =
device version. It seems like we need a model number claim for HW. I =
will work on that.<o:p class=3D""></o:p></div></div><div class=3D""><div =
style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><o:p class=3D"">&nbsp;</o:p></div></div><div =
class=3D""><div style=3D"margin: 0cm; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D"">Seems like submodules would be used to =
organize claims for layered attestation and all of the above claims can =
occur in any submodule they need to.<o:p class=3D""></o:p></div></div><div=
 class=3D""><div style=3D"margin: 0cm; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div></div><div class=3D""><div style=3D"margin: =
0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=3D"">Does =
this mostly cover it?&nbsp;<o:p class=3D""></o:p></div></div><div =
class=3D""><div style=3D"margin: 0cm; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div></div><div class=3D""><div style=3D"margin: =
0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=3D"">I =
worry that the HW claims are bit too rigid in their use of EAN-13 and =
IEEE registries. Might need to do something about that.<o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div></div><div style=3D"margin: 0cm; font-size: =
11pt; font-family: Calibri, sans-serif;" class=3D"">LL<o:p =
class=3D""></o:p></div><div class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div><div class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><br =
class=3D""><br class=3D""><o:p class=3D""></o:p></div><blockquote =
style=3D"margin-top: 5pt; margin-bottom: 5pt;" class=3D""><div =
class=3D""><div style=3D"margin: 0cm; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D"">On Oct 27, 2020, at 1:26 PM, Dave =
Thaler &lt;<a href=3D"mailto:dthaler@microsoft.com" style=3D"color: =
blue; text-decoration: underline;" =
class=3D"">dthaler@microsoft.com</a>&gt; wrote:<o:p =
class=3D""></o:p></div></div><div style=3D"margin: 0cm; font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div><div class=3D""><div class=3D""><div =
style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><span style=3D"color: rgb(31, 73, 125);" =
class=3D"">Inline below=E2=80=A6</span><span style=3D"font-size: 12pt; =
font-family: &quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"color: rgb(31, 73, 125);" class=3D"">&nbsp;</span><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><o:p class=3D""></o:p></span></div></div><div =
class=3D""><div style=3D"border-style: solid none none; =
border-top-width: 1pt; border-top-color: rgb(225, 225, 225); padding: =
3pt 0cm 0cm;" class=3D""><div style=3D"margin-left: 36pt;" class=3D""><div=
 style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><b class=3D"">From:</b><span =
class=3D"apple-converted-space">&nbsp;</span>Laurence Lundblade &lt;<a =
href=3D"mailto:lgl@island-resort.com" style=3D"color: blue; =
text-decoration: underline;" class=3D""><span style=3D"color: purple;" =
class=3D"">lgl@island-resort.com</span></a>&gt;<span =
class=3D"apple-converted-space">&nbsp;</span><br class=3D""><b =
class=3D"">Sent:</b><span =
class=3D"apple-converted-space">&nbsp;</span>Tuesday, October 27, 2020 =
11:57 AM<br class=3D""><b class=3D"">To:</b><span =
class=3D"apple-converted-space">&nbsp;</span>Dave Thaler &lt;<a =
href=3D"mailto:dthaler@microsoft.com" style=3D"color: blue; =
text-decoration: underline;" class=3D""><span style=3D"color: purple;" =
class=3D"">dthaler@microsoft.com</span></a>&gt;<br class=3D""><b =
class=3D"">Cc:</b><span class=3D"apple-converted-space">&nbsp;</span><a =
href=3D"mailto:rats@ietf.org" style=3D"color: blue; text-decoration: =
underline;" class=3D""><span style=3D"color: purple;" =
class=3D"">rats@ietf.org</span></a>; teep &lt;<a =
href=3D"mailto:teep@ietf.org" style=3D"color: blue; text-decoration: =
underline;" class=3D""><span style=3D"color: purple;" =
class=3D"">teep@ietf.org</span></a>&gt;<br class=3D""><b =
class=3D"">Subject:</b><span =
class=3D"apple-converted-space">&nbsp;</span>Re: [Rats] EAT claims =
needed by TEEP<span style=3D"font-size: 12pt; font-family: &quot;Times =
New Roman&quot;, serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div></div></div><div style=3D"margin-left:=
 36pt;" class=3D""><div style=3D"margin: 0cm; font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D""><span style=3D"font-size: =
12pt; font-family: &quot;Times New Roman&quot;, serif;" =
class=3D"">&nbsp;<o:p class=3D""></o:p></span></div></div><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">Personally, I think attestation of TEE=E2=80=99s is =
pretty important and should be handled well in EAT. So I=E2=80=99m =
interested in working on and adding claims for this to EAT.<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">&nbsp;<o:p =
class=3D""></o:p></span></div></div></div><div class=3D""><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">After reading section 7.1 in TEEP architecture, it =
does seem like there some work to do here to get to specific =
standardized interoperable claims.<o:p =
class=3D""></o:p></span></div></div></div><div class=3D""><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">&nbsp;<o:p =
class=3D""></o:p></span></div></div></div><div class=3D""><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">More comments below.<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><br class=3D""><br class=3D""><br class=3D""><o:p =
class=3D""></o:p></span></div></div><blockquote style=3D"margin-top: =
5pt; margin-bottom: 5pt;" class=3D""><div class=3D""><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">On Oct 26, 2020, at 3:15 PM, Dave Thaler &lt;<a =
href=3D"mailto:dthaler=3D40microsoft.com@dmarc.ietf.org" style=3D"color: =
blue; text-decoration: underline;" class=3D""><span style=3D"color: =
purple;" class=3D"">dthaler=3D40microsoft.com@dmarc.ietf.org</span></a>&gt=
; wrote:<o:p class=3D""></o:p></span></div></div></div><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">&nbsp;<o:p class=3D""></o:p></span></div></div><div =
class=3D""><div class=3D""><div style=3D"margin-left: 36pt;" =
class=3D""><div style=3D"margin: 0cm; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D"">As discussed in previous IETF meetings, =
if there are claims beyond the base set that<br class=3D"">other WGs =
need, they can be specified by the other WGs with review by RATS.<span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><o:p class=3D""></o:p></span></div></div></div><div =
class=3D""><div style=3D"margin-left: 36pt;" class=3D""><div =
style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">&nbsp;<span style=3D"font-size: 12pt; =
font-family: &quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div></div><div class=3D""><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D"">The TEEP =
WG needs the following in EATs and I am not sure whether they can =
be<span style=3D"font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div></div><div class=3D""><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D"">covered =
by existing claims or whether TEEP-specific claims are needed.&nbsp; =
From<span style=3D"font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div></div><div class=3D""><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D"">section =
7.1 of draft-ietf-teep-architecture:<span style=3D"font-size: 12pt; =
font-family: &quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div></div><div class=3D""><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D"">&nbsp;<span=
 style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><o:p class=3D""></o:p></span></div></div></div><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin-left: =
36pt;" class=3D""><div style=3D"margin: 0cm; font-size: 11pt; =
font-family: Calibri, sans-serif; text-indent: -18pt;" class=3D""><span =
style=3D"font-size: 10pt; font-family: Wingdings;" =
class=3D"">=C3=98</span><span style=3D"font-size: 7pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D"">&nbsp;<span =
class=3D"apple-converted-space">&nbsp;</span></span><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;-&nbsp; Device Identifying Information: =
TEEP attestations may need to</span><span style=3D"font-size: 12pt; =
font-family: &quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div></div><div style=3D"margin-left: =
36pt;" class=3D""><div style=3D"margin-left: 36pt;" class=3D""><div =
style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif; =
text-indent: -18pt;" class=3D""><span style=3D"font-size: 10pt; =
font-family: Wingdings;" class=3D"">=C3=98</span><span style=3D"font-size:=
 7pt; font-family: &quot;Times New Roman&quot;, serif;" =
class=3D"">&nbsp;<span =
class=3D"apple-converted-space">&nbsp;</span></span><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;uniquely identify a =
device to the TAM.&nbsp; Unique device</span><span style=3D"font-size: =
12pt; font-family: &quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div></div><div style=3D"margin-left: =
36pt;" class=3D""><div style=3D"margin-left: 36pt;" class=3D""><div =
style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif; =
text-indent: -18pt;" class=3D""><span style=3D"font-size: 10pt; =
font-family: Wingdings;" class=3D"">=C3=98</span><span style=3D"font-size:=
 7pt; font-family: &quot;Times New Roman&quot;, serif;" =
class=3D"">&nbsp;<span =
class=3D"apple-converted-space">&nbsp;</span></span><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;identification allows the =
TAM to provide services to the device,</span><span style=3D"font-size: =
12pt; font-family: &quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div></div><div style=3D"margin-left: =
36pt;" class=3D""><div style=3D"margin-left: 36pt;" class=3D""><div =
style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif; =
text-indent: -18pt;" class=3D""><span style=3D"font-size: 10pt; =
font-family: Wingdings;" class=3D"">=C3=98</span><span style=3D"font-size:=
 7pt; font-family: &quot;Times New Roman&quot;, serif;" =
class=3D"">&nbsp;<span =
class=3D"apple-converted-space">&nbsp;</span></span><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;such as managing =
installed TAs, and providing subscriptions to</span><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><o:p class=3D""></o:p></span></div></div></div><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin-left: =
36pt;" class=3D""><div style=3D"margin: 0cm; font-size: 11pt; =
font-family: Calibri, sans-serif; text-indent: -18pt;" class=3D""><span =
style=3D"font-size: 10pt; font-family: Wingdings;" =
class=3D"">=C3=98</span><span style=3D"font-size: 7pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D"">&nbsp;<span =
class=3D"apple-converted-space">&nbsp;</span></span><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;services, and locating =
device-specific keying material to</span><span style=3D"font-size: 12pt; =
font-family: &quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div></div><div style=3D"margin-left: =
36pt;" class=3D""><div style=3D"margin-left: 36pt;" class=3D""><div =
style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif; =
text-indent: -18pt;" class=3D""><span style=3D"font-size: 10pt; =
font-family: Wingdings;" class=3D"">=C3=98</span><span style=3D"font-size:=
 7pt; font-family: &quot;Times New Roman&quot;, serif;" =
class=3D"">&nbsp;<span =
class=3D"apple-converted-space">&nbsp;</span></span><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;communicate with or =
authenticate the device.</span><span style=3D"font-size: 12pt; =
font-family: &quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div></div><div class=3D""><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;</span><span style=3D"font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div></div><div class=3D""><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 10.5pt; font-family: &quot;Segoe UI&quot;, =
sans-serif; color: rgb(36, 41, 46);" class=3D"">I believe the Universal =
Entity ID Claim (ueid) is claim that meets the above requirement.<br =
class=3D"">But the TEEP arch then goes on to say:</span><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><o:p class=3D""></o:p></span></div></div></div><div =
style=3D"margin-left: 18pt;" class=3D""><div style=3D"margin-left: =
36pt;" class=3D""><div style=3D"margin: 0cm; font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D""><span style=3D"font-size: =
10pt; font-family: &quot;Courier New&quot;;" class=3D"">&nbsp;</span><span=
 style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><o:p class=3D""></o:p></span></div></div></div><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin-left: =
36pt;" class=3D""><div style=3D"margin: 0cm; font-size: 11pt; =
font-family: Calibri, sans-serif; text-indent: -18pt;" class=3D""><span =
style=3D"font-size: 10pt; font-family: Wingdings;" =
class=3D"">=C3=98</span><span style=3D"font-size: 7pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D"">&nbsp;<span =
class=3D"apple-converted-space">&nbsp;</span></span><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;In some use cases =
it</span><span style=3D"font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div></div><div style=3D"margin-left: =
36pt;" class=3D""><div style=3D"margin-left: 36pt;" class=3D""><div =
style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, sans-serif; =
text-indent: -18pt;" class=3D""><span style=3D"font-size: 10pt; =
font-family: Wingdings;" class=3D"">=C3=98</span><span style=3D"font-size:=
 7pt; font-family: &quot;Times New Roman&quot;, serif;" =
class=3D"">&nbsp;<span =
class=3D"apple-converted-space">&nbsp;</span></span><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;may be sufficient to =
identify only the class of the device.&nbsp; The</span><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><o:p class=3D""></o:p></span></div></div></div><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin-left: =
36pt;" class=3D""><div style=3D"margin: 0cm; font-size: 11pt; =
font-family: Calibri, sans-serif; text-indent: -18pt;" class=3D""><span =
style=3D"font-size: 10pt; font-family: Wingdings;" =
class=3D"">=C3=98</span><span style=3D"font-size: 7pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D"">&nbsp;<span =
class=3D"apple-converted-space">&nbsp;</span></span><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;security and privacy =
requirements regarding device identification</span><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><o:p class=3D""></o:p></span></div></div></div><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin-left: =
36pt;" class=3D""><div style=3D"margin: 0cm; font-size: 11pt; =
font-family: Calibri, sans-serif; text-indent: -18pt;" class=3D""><span =
style=3D"font-size: 10pt; font-family: Wingdings;" =
class=3D"">=C3=98</span><span style=3D"font-size: 7pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D"">&nbsp;<span =
class=3D"apple-converted-space">&nbsp;</span></span><span =
style=3D"font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;will vary with the type =
of TA provisioned to the TEE.</span><span style=3D"font-size: 12pt; =
font-family: &quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div></div><div class=3D""><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif; background-color: =
white;" class=3D""><span style=3D"font-size: 10.5pt; font-family: =
&quot;Segoe UI&quot;, sans-serif; color: rgb(36, 41, 46);" =
class=3D"">Which EAT claim contains the device class? The closest thing =
I see is OEM Identification by IEEE (oemid)<br class=3D"">but I am not =
sure that is sufficient since it's only the OEM not the device class =
from that OEM.</span><span style=3D"font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div></div><div class=3D""><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif; background-color: =
white;" class=3D""><span style=3D"font-size: 10.5pt; font-family: =
&quot;Segoe UI&quot;, sans-serif; color: rgb(36, 41, 46);" class=3D"">This=
 doesn=E2=80=99t seem like something that should be TEEP specific =
though, so can someone tell me how to<br class=3D"">represent device =
class using the claims in the EAT spec?</span><span style=3D"font-size: =
12pt; font-family: &quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div></div></div></blockquote><div =
class=3D""><div style=3D"margin-left: 36pt;" class=3D""><div =
style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><span style=3D"font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D"">&nbsp;<o:p =
class=3D""></o:p></span></div></div></div><div class=3D""><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">I don=E2=80=99t think the OEMID, UEID or other should =
be (ab)used &nbsp;to represent device class. That would result in them =
being less reliable and useful in a generic sense. We should come up =
with a new claim.<o:p class=3D""></o:p></span></div></div><div =
class=3D""><div style=3D"margin: 0cm; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span style=3D"color: rgb(31, 73, =
125);" class=3D"">&nbsp;</span><span style=3D"font-size: 12pt; =
font-family: &quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"color: rgb(31, 73, 125);" class=3D"">+1</span><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><o:p class=3D""></o:p></span></div></div></div><div =
class=3D""><div style=3D"margin-left: 36pt;" class=3D""><div =
style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><span style=3D"font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D"">&nbsp;<o:p =
class=3D""></o:p></span></div></div></div><div class=3D""><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">We can define a claim to be &nbsp;the device class =
and make it a byte string like a UEID, but I think we have to go further =
to make it useful as an interoperable standardize claim. There has to be =
some method for the classification. TrustZone vs hypervisor based? Fast =
vs slow? Has a protected mode kernel and TAs? The TEEP document =
doesn=E2=80=99t say. This seems problematic without a classification =
scheme.<o:p class=3D""></o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><span style=3D"color: rgb(31, 73, 125);" =
class=3D"">&nbsp;</span><span style=3D"font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"color: rgb(31, 73, 125);" class=3D"">[DT] I=E2=80=99m not sure =
we need a classification scheme, at least for TEEP. &nbsp;A simple =
device class byte string as you suggest would suffice in my =
opinion.</span><span style=3D"font-size: 12pt; font-family: &quot;Times =
New Roman&quot;, serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div></div><div class=3D""><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">&nbsp;<o:p =
class=3D""></o:p></span></div></div></div><div class=3D""><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">I wonder if the intent is more about grouping, in =
which case we can define a GEID (Group Entity ID) that looks a lot like =
a UEID. That seems useful and sensible to me. It is not about =
classification based on any characteristics. It lines up with the =
privacy preserving technique of one key per 100,000 devices.<o:p =
class=3D""></o:p></span></div></div></div><div class=3D""><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">&nbsp;<o:p =
class=3D""></o:p></span></div></div></div><blockquote style=3D"margin-top:=
 5pt; margin-bottom: 5pt;" class=3D""><div class=3D""><pre =
style=3D"margin: 0cm 0cm 0.0001pt 72pt; font-size: 10pt; font-family: =
&quot;Courier New&quot;; text-indent: -18pt;" class=3D""><span =
style=3D"font-family: Wingdings;" class=3D"">=C3=98</span><span =
style=3D"font-size: 7pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">&nbsp; </span>&nbsp;&nbsp;&nbsp;-&nbsp; TEE =
Identifying Information: The type of TEE that generated this<o:p =
class=3D""></o:p></pre><pre style=3D"margin: 0cm 0cm 0.0001pt 72pt; =
font-size: 10pt; font-family: &quot;Courier New&quot;; text-indent: =
-18pt;" class=3D""><span style=3D"font-family: Wingdings;" =
class=3D"">=C3=98</span><span style=3D"font-size: 7pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D"">&nbsp; =
</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;attestation must be =
identified, including version identification<o:p =
class=3D""></o:p></pre><pre style=3D"margin: 0cm 0cm 0.0001pt 72pt; =
font-size: 10pt; font-family: &quot;Courier New&quot;; text-indent: =
-18pt;" class=3D""><span style=3D"font-family: Wingdings;" =
class=3D"">=C3=98</span><span style=3D"font-size: 7pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D"">&nbsp; =
</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;information such as the =
hardware, firmware, and software version<o:p class=3D""></o:p></pre><pre =
style=3D"margin: 0cm 0cm 0.0001pt 72pt; font-size: 10pt; font-family: =
&quot;Courier New&quot;; text-indent: -18pt;" class=3D""><span =
style=3D"font-family: Wingdings;" class=3D"">=C3=98</span><span =
style=3D"font-size: 7pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">&nbsp; </span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;of =
the TEE, as applicable by the TEE type.&nbsp; TEE manufacturer<o:p =
class=3D""></o:p></pre><pre style=3D"margin: 0cm 0cm 0.0001pt 72pt; =
font-size: 10pt; font-family: &quot;Courier New&quot;; text-indent: =
-18pt;" class=3D""><span style=3D"font-family: Wingdings;" =
class=3D"">=C3=98</span><span style=3D"font-size: 7pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D"">&nbsp; =
</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;information for the TEE is =
required in order to disambiguate the<o:p class=3D""></o:p></pre><pre =
style=3D"margin: 0cm 0cm 0.0001pt 72pt; font-size: 10pt; font-family: =
&quot;Courier New&quot;; text-indent: -18pt;" class=3D""><span =
style=3D"font-family: Wingdings;" class=3D"">=C3=98</span><span =
style=3D"font-size: 7pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">&nbsp; =
</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;same TEE type created by =
different manufacturers and address<o:p class=3D""></o:p></pre><pre =
style=3D"margin: 0cm 0cm 0.0001pt 72pt; font-size: 10pt; font-family: =
&quot;Courier New&quot;; text-indent: -18pt;" class=3D""><span =
style=3D"font-family: Wingdings;" class=3D"">=C3=98</span><span =
style=3D"font-size: 7pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">&nbsp; =
</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;considerations around =
manufacturer provisioning, keying and<o:p class=3D""></o:p></pre><pre =
style=3D"margin: 0cm 0cm 0.0001pt 72pt; font-size: 10pt; font-family: =
&quot;Courier New&quot;; text-indent: -18pt;" class=3D""><span =
style=3D"font-family: Wingdings;" class=3D"">=C3=98</span><span =
style=3D"font-size: 7pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">&nbsp; =
</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;support for the TEE.<o:p =
class=3D""></o:p></pre><pre style=3D"margin: 0cm 0cm 0.0001pt 72pt; =
font-size: 10pt; font-family: &quot;Courier New&quot;;" =
class=3D"">&nbsp;<o:p class=3D""></o:p></pre><div style=3D"margin-left: =
36pt;" class=3D""><div style=3D"margin: 0cm; font-size: 11pt; =
font-family: Calibri, sans-serif; background-color: white;" =
class=3D""><span style=3D"font-size: 10.5pt; font-family: &quot;Segoe =
UI&quot;, sans-serif; color: rgb(36, 41, 46);" class=3D"">Similarly for =
this requirement, the closest thing I see is Origination Claim =
(origination) but I am not sure<br class=3D"">that is sufficient since =
it's just the manufacturer not the "version identification information =
such as the<br class=3D"">hardware, firmware, and software version of =
the TEE=E2=80=9D</span><span style=3D"font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div></div></blockquote><div =
class=3D""><div style=3D"margin-left: 36pt;" class=3D""><div =
style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><span style=3D"font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D"">&nbsp;<o:p =
class=3D""></o:p></span></div></div></div><div class=3D""><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">Definitely not origination claim.<span =
class=3D"apple-converted-space">&nbsp;</span><o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"color: rgb(31, 73, 125);" class=3D"">&nbsp;</span><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><o:p class=3D""></o:p></span></div></div><div =
class=3D""><div style=3D"margin: 0cm; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span style=3D"color: rgb(31, 73, =
125);" class=3D"">+1</span><span style=3D"font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"color: rgb(31, 73, 125);" class=3D"">&nbsp;</span><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><o:p class=3D""></o:p></span></div></div><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">The intent of it something like Endorser =
identification and I think it should be replaced by an Endorser/X.509 =
cert URL.<o:p class=3D""></o:p></span></div></div></div><div =
class=3D""><div style=3D"margin-left: 36pt;" class=3D""><div =
style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><span style=3D"font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D"">&nbsp;<o:p =
class=3D""></o:p></span></div></div></div><div class=3D""><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">I would say, this is a combination of claims<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"color: rgb(31, 73, 125);" class=3D"">&nbsp;</span><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><o:p class=3D""></o:p></span></div></div><div =
class=3D""><div style=3D"margin: 0cm; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span style=3D"color: rgb(31, 73, =
125);" class=3D"">It=E2=80=99s just used:</span><span style=3D"font-size: =
12pt; font-family: &quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div><div style=3D"margin-left: 36pt;" =
class=3D""><div style=3D"margin: 0cm; font-size: 11pt; font-family: =
Calibri, sans-serif; text-indent: -18pt;" class=3D""><span style=3D"color:=
 rgb(31, 73, 125);" class=3D"">1)</span><span style=3D"font-size: 7pt; =
font-family: &quot;Times New Roman&quot;, serif; color: rgb(31, 73, =
125);" class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;<span =
class=3D"apple-converted-space">&nbsp;</span></span><span style=3D"color: =
rgb(31, 73, 125);" class=3D"">For a Verifier in appraising the evidence =
(nothing TEEP specific here, appraisal policy can involve any claim), =
and</span><span style=3D"font-size: 12pt; font-family: &quot;Times New =
Roman&quot;, serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div><div style=3D"margin-left: 36pt;" =
class=3D""><div style=3D"margin: 0cm; font-size: 11pt; font-family: =
Calibri, sans-serif; text-indent: -18pt;" class=3D""><span style=3D"color:=
 rgb(31, 73, 125);" class=3D"">2)</span><span style=3D"font-size: 7pt; =
font-family: &quot;Times New Roman&quot;, serif; color: rgb(31, 73, =
125);" class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;<span =
class=3D"apple-converted-space">&nbsp;</span></span><span style=3D"color: =
rgb(31, 73, 125);" class=3D"">To be used by a TAM to decide which TA=E2=80=
=99s apply to the TEE.&nbsp; In that sense it=E2=80=99s just like any =
other vendor id + device class for any non TEE, and I believe if there =
were a byte string for device class as you suggest that would be =
sufficient in my opinion.</span><span style=3D"font-size: 12pt; =
font-family: &quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"color: rgb(31, 73, 125);" class=3D"">&nbsp;</span><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><o:p class=3D""></o:p></span></div></div><div =
class=3D""><div style=3D"margin: 0cm; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span style=3D"color: rgb(31, 73, =
125);" class=3D"">Keeping in mind the =E2=80=9Clayered attestation=E2=80=9D=
 concept in the arch doc, as long as we have a claimset per layer, then =
I think the same =E2=80=9Cvendor id=E2=80=9D and =E2=80=9Cclass=E2=80=9D =
claims that would apply to any device could be reused for the TEE, and =
reused for describing each layer.&nbsp; E.g., a =E2=80=9Cversion=E2=80=9D =
claim would apply at the hardware layer and be the hardware version, at =
the firmware layer and be a firmware version, at the OS layer and be an =
OS version, etc.</span><span style=3D"font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"color: rgb(31, 73, 125);" class=3D"">&nbsp;</span><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><o:p class=3D""></o:p></span></div></div></div><div =
class=3D""><div style=3D"margin-left: 36pt;" class=3D""><div =
style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><span style=3D"font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D"">&nbsp;<o:p =
class=3D""></o:p></span></div></div></div><div class=3D""><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">I=E2=80=99ve just added a&nbsp;<a =
href=3D"https://nam06.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%=
2Fgithub.com%2Fietf-rats-wg%2Feat%2Fpull%2F68&amp;data=3D04%7C01%7Cdthaler=
%40microsoft.com%7Cab1ee7788f1f4d449c5508d87aaa3006%7C72f988bf86f141af91ab=
2d7cd011db47%7C1%7C0%7C637394218658895685%7CUnknown%7CTWFpbGZsb3d8eyJWIjoi=
MC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdat=
a=3DJyNCTwUJvkCPk3H9uYmD0BLfUXPu6vhnQomkIqiqiUM%3D&amp;reserved=3D0" =
style=3D"color: blue; text-decoration: underline;" class=3D""><span =
style=3D"color: purple;" class=3D"">PR</span></a>&nbsp;for HW version =
claims.<o:p class=3D""></o:p></span></div></div></div><div class=3D""><div=
 style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">&nbsp;<o:p =
class=3D""></o:p></span></div></div></div><div class=3D""><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">The intent for SW version claims is to use CoSWID. We =
should probably create some examples to see if it can represent what =
TEEP wants to represent.<o:p class=3D""></o:p></span></div></div><div =
class=3D""><div style=3D"margin: 0cm; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span style=3D"color: rgb(31, 73, =
125);" class=3D"">&nbsp;</span><span style=3D"font-size: 12pt; =
font-family: &quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"color: rgb(31, 73, 125);" class=3D"">Agree this sounds =
promising.</span><span style=3D"font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div></div><div class=3D""><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">&nbsp;<o:p =
class=3D""></o:p></span></div></div></div><div class=3D""><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">The paragraph mentions =E2=80=9Ctype of TEE=E2=80=9D. =
I=E2=80=99m not sure what is intended. I don=E2=80=99t know of any =
common taxonomy for classifying TEEs.<o:p =
class=3D""></o:p></span></div></div></div><div class=3D""><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">&nbsp;<o:p =
class=3D""></o:p></span></div></div></div><div class=3D""><div =
style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><span style=3D"font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif; color: rgb(31, 73, 125);" class=3D"">A=
 unique identifier is sufficient in my view, no =E2=80=9Cclassification=E2=
=80=9D or =E2=80=9Ctaxonomy=E2=80=9D is required by anything that the =
TEEP WG has discussed to date, as far as I know.</span><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><br class=3D""><br class=3D""><br class=3D""><o:p =
class=3D""></o:p></span></div></div><blockquote style=3D"margin-top: =
5pt; margin-bottom: 5pt;" class=3D""><div class=3D""><div class=3D""><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D"">Should =
the TEEP WG define TEEP-specific claims for such information?<span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div></div></div></blockquote><div =
class=3D""><div style=3D"margin-left: 36pt;" class=3D""><div =
style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><span style=3D"font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D"">&nbsp;<o:p =
class=3D""></o:p></span></div></div></div><div class=3D""><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">I=E2=80=99d like to see most of them go into EAT =
unless they are super specific to TEEP (TEEP not TEEs). I think there is =
value in broad standardize claims as it promotes interoperability of =
RATS.<o:p class=3D""></o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><span style=3D"color: rgb(31, 73, 125);" =
class=3D"">&nbsp;</span><span style=3D"font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"color: rgb(31, 73, 125);" class=3D"">Sounds good to =
me.&nbsp;&nbsp; Consider this a request to add some way to express =
=E2=80=9Cvendor id=E2=80=9D, =E2=80=9Cmodel=E2=80=9D (or =E2=80=9Cclass=E2=
=80=9D or whatever you want to call it), and =E2=80=9Cversion=E2=80=9D =
as claims that can be applied in claimsets at various =
layers.&nbsp;&nbsp; I glanced at the PR you referenced and it seems to =
be a chip-specific version, not a generic version claim that can be used =
at multiple layers, so is not sufficient to meet the TEEP arch draft=E2=80=
=99s requirements, we still need other claims added.</span><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><o:p class=3D""></o:p></span></div></div><div =
class=3D""><div style=3D"margin: 0cm; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span style=3D"color: rgb(31, 73, =
125);" class=3D"">&nbsp;</span><span style=3D"font-size: 12pt; =
font-family: &quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0cm; font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"color: rgb(31, 73, 125);" class=3D"">Thanks!</span><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><o:p class=3D""></o:p></span></div></div><div =
class=3D""><div style=3D"margin: 0cm; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span style=3D"color: rgb(31, 73, =
125);" class=3D"">Dave</span><span style=3D"font-size: 12pt; =
font-family: &quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div></div><div class=3D""><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">&nbsp;<o:p =
class=3D""></o:p></span></div></div></div><div class=3D""><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">LL<o:p class=3D""></o:p></span></div></div></div><div =
class=3D""><div style=3D"margin-left: 36pt;" class=3D""><div =
style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><span style=3D"font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D"">&nbsp;<o:p =
class=3D""></o:p></span></div></div></div><div style=3D"margin-left: =
36pt;" class=3D""><div style=3D"margin: 0cm; font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D""><span style=3D"font-size: =
12pt; font-family: &quot;Times New Roman&quot;, serif;" class=3D""><br =
class=3D""><br class=3D""><br class=3D""><o:p =
class=3D""></o:p></span></div></div><blockquote style=3D"margin-top: =
5pt; margin-bottom: 5pt;" class=3D""><div class=3D""><div class=3D""><div =
style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D"">&nbsp;<span=
 style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><o:p class=3D""></o:p></span></div></div></div><div =
class=3D""><div style=3D"margin-left: 36pt;" class=3D""><div =
style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">Dave<span style=3D"font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D""><o:p =
class=3D""></o:p></span></div></div></div><div style=3D"margin-left: =
36pt;" class=3D""><div style=3D"margin: 0cm; font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D""><span style=3D"font-size: =
9pt; font-family: Helvetica, sans-serif;" =
class=3D"">_______________________________________________<br =
class=3D"">RATS mailing list<br class=3D""></span><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D""><a href=3D"mailto:RATS@ietf.org" style=3D"color: =
blue; text-decoration: underline;" class=3D""><span style=3D"font-size: =
9pt; font-family: Helvetica, sans-serif; color: rgb(149, 79, 114);" =
class=3D"">RATS@ietf.org</span></a></span><span style=3D"font-size: 9pt; =
font-family: Helvetica, sans-serif;" class=3D""><br =
class=3D""></span><span style=3D"font-size: 12pt; font-family: =
&quot;Times New Roman&quot;, serif;" class=3D""><a =
href=3D"https://nam06.safelinks.protection.outlook.com/?url=3Dhttps%3A%2F%=
2Fwww.ietf.org%2Fmailman%2Flistinfo%2Frats&amp;data=3D04%7C01%7Cdthaler%40=
microsoft.com%7Cab1ee7788f1f4d449c5508d87aaa3006%7C72f988bf86f141af91ab2d7=
cd011db47%7C1%7C0%7C637394218658895685%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4=
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style=3D"margin-left: 36pt;" class=3D""><div style=3D"margin: 0cm; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: &quot;Times New Roman&quot;, =
serif;" class=3D"">&nbsp;<o:p =
class=3D""></o:p></span></div></div></div></div></blockquote></div><div =
style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div></div></div><span style=3D"caret-color: =
rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: =
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From: Thomas Fossati <Thomas.Fossati@arm.com>
To: Laurence Lundblade <lgl@island-resort.com>, Simon Frost <Simon.Frost@arm.com>
CC: "rats@ietf.org" <rats@ietf.org>, teep <teep@ietf.org>, Dave Thaler <dthaler@microsoft.com>, Thomas Fossati <Thomas.Fossati@arm.com>
Thread-Topic: [Rats] EAT claims needed by TEEP
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Archived-At: <https://mailarchive.ietf.org/arch/msg/teep/1SYfjlNee4xQN5gqD0uZAvpMfyk>
Subject: Re: [Teep] [Rats] EAT claims needed by TEEP
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Hi Laurence,

> My understanding is that they are always encoded as CBOR text strings,
> so floating-point doesn=92t mean #7.25 or such.

Correct.  In (Co)SWID software-version is just a text string and version-sc=
heme
is there to do some semantic polishing.  But the underlying type is always =
#3.

Maybe I=92m misunderstanding your proposal here, but I would be circumspect
in mixing SWIDs attributes, which are scoped to software artifacts, with HW
identifiers.

Cheers!

IMPORTANT NOTICE: The contents of this email and any attachments are confid=
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<p class=3D"MsoNormal">Hi Laurence,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">&gt; My understanding is that they are always encode=
d as CBOR text strings,<o:p></o:p></p>
<p class=3D"MsoNormal">&gt; so floating-point doesn=92t mean #7.25 or such.=
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Correct.&nbsp; In (Co)SWID software-version is just =
a text string and version-scheme<o:p></o:p></p>
<p class=3D"MsoNormal">is there to do some semantic polishing.&nbsp; But th=
e underlying type is always #3.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Maybe I=92m misunderstanding your proposal here, but=
 I would be circumspect<o:p></o:p></p>
<p class=3D"MsoNormal">in mixing SWIDs attributes, which are scoped to soft=
ware artifacts, with HW<o:p></o:p></p>
<p class=3D"MsoNormal">identifiers.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Cheers!<o:p></o:p></p>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
</div>
IMPORTANT NOTICE: The contents of this email and any attachments are confid=
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</body>
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Cc: Simon Frost <Simon.Frost@arm.com>, "rats@ietf.org" <rats@ietf.org>, teep <teep@ietf.org>, Dave Thaler <dthaler@microsoft.com>
To: Thomas Fossati <Thomas.Fossati@arm.com>
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Subject: Re: [Teep] [Rats] EAT claims needed by TEEP
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> On Oct 29, 2020, at 1:45 PM, Thomas Fossati <Thomas.Fossati@arm.com> =
wrote:
>=20
> Hi Laurence,
> =20
> > My understanding is that they are always encoded as CBOR text =
strings,
> > so floating-point doesn=E2=80=99t mean #7.25 or such.
> =20
> Correct.  In (Co)SWID software-version is just a text string and =
version-scheme
> is there to do some semantic polishing.  But the underlying type is =
always #3.
> =20
> Maybe I=E2=80=99m misunderstanding your proposal here, but I would be =
circumspect
> in mixing SWIDs attributes, which are scoped to software artifacts, =
with HW
> identifiers.

Hi Thomas,

All the SW Version stuff would fall under a single EAT claims that =
contains a full CoSWID.

For HW Version, I was thinking of two EAT claims, one for the version =
text, another for the version scheme (or we could go off and define a =
full CoHWID).

LL




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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D""><br =
class=3D""><div><blockquote type=3D"cite" class=3D""><div class=3D"">On =
Oct 29, 2020, at 1:45 PM, Thomas Fossati &lt;<a =
href=3D"mailto:Thomas.Fossati@arm.com" =
class=3D"">Thomas.Fossati@arm.com</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><div =
class=3D"WordSection1" style=3D"page: WordSection1; caret-color: rgb(0, =
0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none;"><div style=3D"margin: 0cm; font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D"">Hi Laurence,<o:p =
class=3D""></o:p></div><div style=3D"margin: 0cm; font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div><div style=3D"margin: 0cm; font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D"">&gt; My understanding is =
that they are always encoded as CBOR text strings,<o:p =
class=3D""></o:p></div><div style=3D"margin: 0cm; font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D"">&gt; so floating-point =
doesn=E2=80=99t mean #7.25 or such.<o:p class=3D""></o:p></div><div =
style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><o:p class=3D"">&nbsp;</o:p></div><div =
style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">Correct.&nbsp; In (Co)SWID software-version is =
just a text string and version-scheme<o:p class=3D""></o:p></div><div =
style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">is there to do some semantic polishing.&nbsp; =
But the underlying type is always #3.<o:p class=3D""></o:p></div><div =
style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><o:p class=3D"">&nbsp;</o:p></div><div =
style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">Maybe I=E2=80=99m misunderstanding your proposal =
here, but I would be circumspect<o:p class=3D""></o:p></div><div =
style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">in mixing SWIDs attributes, which are scoped to =
software artifacts, with HW<o:p class=3D""></o:p></div><div =
style=3D"margin: 0cm; font-size: 11pt; font-family: Calibri, =
sans-serif;" =
class=3D"">identifiers.</div></div></div></blockquote><div><br =
class=3D""></div>Hi Thomas,<br class=3D""><div><br =
class=3D""></div><div>All the SW Version stuff would fall under a single =
EAT claims that contains a full CoSWID.</div><div><br =
class=3D""></div><div>For HW Version, I was thinking of two EAT claims, =
one for the version text, another for the version scheme (or we could go =
off and define a full CoHWID).</div><div><br =
class=3D""></div><div>LL</div><div><br class=3D""></div><div><br =
class=3D""></div></div><br class=3D""></body></html>=

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From: Thomas Fossati <Thomas.Fossati@arm.com>
To: Laurence Lundblade <lgl@island-resort.com>
CC: "rats@ietf.org" <rats@ietf.org>, teep <teep@ietf.org>, Dave Thaler <dthaler@microsoft.com>, Simon Frost <Simon.Frost@arm.com>, Thomas Fossati <Thomas.Fossati@arm.com>
Thread-Topic: [Rats] EAT claims needed by TEEP
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Archived-At: <https://mailarchive.ietf.org/arch/msg/teep/m5XeU941rPvuQymSMe6YjKZCtIQ>
Subject: Re: [Teep] [Rats] EAT claims needed by TEEP
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On 29/10/2020, 21:07, "RATS" <rats-bounces@ietf.org> wrote:
> On Oct 29, 2020, at 1:45 PM, Thomas Fossati <Thomas.Fossati@arm.com> wrot=
e:
>
> Hi Laurence,
>
> > My understanding is that they are always encoded as CBOR text strings,
> > so floating-point doesn=92t mean #7.25 or such.
>
> Correct.  In (Co)SWID software-version is just a text string and version-=
scheme
> is there to do some semantic polishing.  But the underlying type is alway=
s #3.
>
> Maybe I'm misunderstanding your proposal here, but I would be circumspect
> in mixing SWIDs attributes, which are scoped to software artifacts, with =
HW
> identifiers.
>
>
> Hi Thomas,
>
> All the SW Version stuff would fall under a single EAT claims that
> contains a full CoSWID.
>
> For HW Version, I was thinking of two EAT claims, one for the version
> text, another for the version scheme (or we could go off and define a
> full CoHWID).

OK, looks like I had misunderstood your plan :-) thanks for the
clarification!
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<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Osaka Regular-Mono&=
quot;,sans-serif">On 29/10/2020, 21:07, &quot;RATS&quot; &lt;rats-bounces@i=
etf.org&gt; wrote:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Osaka Regular-Mono&=
quot;,sans-serif">&gt; On Oct 29, 2020, at 1:45 PM, Thomas Fossati &lt;Thom=
as.Fossati@arm.com&gt; wrote:<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Osaka Regular-Mono&=
quot;,sans-serif">&gt;<o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Osaka Regular-Mono&=
quot;,sans-serif">&gt; Hi Laurence,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Osaka Regular-Mono&=
quot;,sans-serif">&gt;<o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Osaka Regular-Mono&=
quot;,sans-serif">&gt; &gt; My understanding is that they are always encode=
d as CBOR text strings,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Osaka Regular-Mono&=
quot;,sans-serif">&gt; &gt; so floating-point doesn=92t mean #7.25 or such.=
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Osaka Regular-Mono&=
quot;,sans-serif">&gt;<o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Osaka Regular-Mono&=
quot;,sans-serif">&gt; Correct.&nbsp; In (Co)SWID software-version is just =
a text string and version-scheme<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Osaka Regular-Mono&=
quot;,sans-serif">&gt; is there to do some semantic polishing.&nbsp; But th=
e underlying type is always #3.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Osaka Regular-Mono&=
quot;,sans-serif">&gt;<o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Osaka Regular-Mono&=
quot;,sans-serif">&gt; Maybe I'm misunderstanding your proposal here, but I=
 would be circumspect<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Osaka Regular-Mono&=
quot;,sans-serif">&gt; in mixing SWIDs attributes, which are scoped to soft=
ware artifacts, with HW<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Osaka Regular-Mono&=
quot;,sans-serif">&gt; identifiers.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Osaka Regular-Mono&=
quot;,sans-serif">&gt;<o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Osaka Regular-Mono&=
quot;,sans-serif">&gt;<o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Osaka Regular-Mono&=
quot;,sans-serif">&gt; Hi Thomas,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Osaka Regular-Mono&=
quot;,sans-serif">&gt;<o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Osaka Regular-Mono&=
quot;,sans-serif">&gt; All the SW Version stuff would fall under a single E=
AT claims that<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Osaka Regular-Mono&=
quot;,sans-serif">&gt; contains a full CoSWID.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Osaka Regular-Mono&=
quot;,sans-serif">&gt;<o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Osaka Regular-Mono&=
quot;,sans-serif">&gt; For HW Version, I was thinking of two EAT claims, on=
e for the version<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Osaka Regular-Mono&=
quot;,sans-serif">&gt; text, another for the version scheme (or we could go=
 off and define a<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Osaka Regular-Mono&=
quot;,sans-serif">&gt; full CoHWID).<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Osaka Regular-Mono&=
quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Osaka Regular-Mono&=
quot;,sans-serif">OK, looks like I had misunderstood your plan :-) thanks f=
or the<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Osaka Regular-Mono&=
quot;,sans-serif;mso-fareast-language:EN-US">clarification!<o:p></o:p></spa=
n></p>
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Subject: [Teep] FYI: Confidential Computing webinar Nov 10
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In past TEEP WG meetings I have given a 1 slide summary of the
Confidential Computing Consortium, which is an org under the Linux Foundati=
on,
focused on open source projects for on trusted execution environments.
And the CCC provided feedback on the TEEP arch doc about the definition of
a TEE which was incorporated and now CCC and TEEP use the same definition.
Similarly Mike Bursell was going to present a TEEP use case from Enarx (an =
open
source project under the CCC) at IETF last year but couldn't make it so I e=
nded up
presenting his slides for him.

Anyway, the CCC is doing an open webinar on confidential computing next wee=
k
and I'm one of the co-presenters.   Because of the synergy between TEEP and=
 the CCC
(and the TEE use case in RATS), I'm sharing the information here since we w=
ant to
continue to encourage collaboration between CCC (for open source)
and TEEP/RATS folks (for standards).

Tuesday November 10, 2020 at 8:30AM PT
https://confidentialcomputing.io/webinar/

CCC meetings are also open to the public and a couple of you have attended =
them,
this webinar is more an intro but potentially of interest to anyone working=
 on TEEs.

Dave

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<div class=3D"WordSection1">
<p class=3D"MsoNormal">In past TEEP WG meetings I have given a 1 slide summ=
ary of the<o:p></o:p></p>
<p class=3D"MsoNormal">Confidential Computing Consortium, which is an org u=
nder the Linux Foundation,<o:p></o:p></p>
<p class=3D"MsoNormal">focused on open source projects for on trusted execu=
tion environments.<o:p></o:p></p>
<p class=3D"MsoNormal">And the CCC provided feedback on the TEEP arch doc a=
bout the definition of<o:p></o:p></p>
<p class=3D"MsoNormal">a TEE which was incorporated and now CCC and TEEP us=
e the same definition.<o:p></o:p></p>
<p class=3D"MsoNormal">Similarly Mike Bursell was going to present a TEEP u=
se case from Enarx (an open<o:p></o:p></p>
<p class=3D"MsoNormal">source project under the CCC) at IETF last year but =
couldn&#8217;t make it so I ended up<o:p></o:p></p>
<p class=3D"MsoNormal">presenting his slides for him.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Anyway, the CCC is doing an open webinar on confiden=
tial computing next week<o:p></o:p></p>
<p class=3D"MsoNormal">and I&#8217;m one of the co-presenters.&nbsp;&nbsp; =
Because of the synergy between TEEP and the CCC<br>
(and the TEE use case in RATS), I&#8217;m sharing the information here sinc=
e we want to<o:p></o:p></p>
<p class=3D"MsoNormal">continue to encourage collaboration between CCC (for=
 open source)
<o:p></o:p></p>
<p class=3D"MsoNormal">and TEEP/RATS folks (for standards).<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-family:&quot;Open Sans&quot;,san=
s-serif;background:white">Tuesday November 10, 2020 at 8:30AM PT</span><o:p=
></o:p></p>
<p class=3D"MsoNormal"><a href=3D"https://confidentialcomputing.io/webinar/=
">https://confidentialcomputing.io/webinar/</a><o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">CCC meetings are also open to the public and a coupl=
e of you have attended them,<o:p></o:p></p>
<p class=3D"MsoNormal">this webinar is more an intro but potentially of int=
erest to anyone working on TEEs.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Dave<o:p></o:p></p>
</div>
</body>
</html>

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