From robert.cragie@gridmerge.com  Fri Mar 16 04:03:20 2012
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Date: Fri, 16 Mar 2012 11:04:49 +0000
From: Robert Cragie <robert.cragie@gridmerge.com>
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Subject: [Pana] Fwd: New Version Notification for draft-yegin-pana-encr-avp-01.txt
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I would like to move this forward so I am soliciting any comments from=20
the PANA mailing list.

Thanks

Robert

-------- Original Message --------
Subject: 	New Version Notification for draft-yegin-pana-encr-avp-01.txt
Date: 	Wed, 04 Jan 2012 01:53:07 -0800
From: 	internet-drafts@ietf.org
To: 	alper.yegin@yegin.org
CC: 	robert.cragie@gridmerge.com, alper.yegin@yegin.org



A new version of I-D, draft-yegin-pana-encr-avp-01.txt has been successfu=
lly submitted by Alper Yegin and posted to the IETF repository.

Filename:	 draft-yegin-pana-encr-avp
Revision:	 01
Title:		 Encrypting PANA AVPs
Creation date:	 2012-01-04
WG ID:		 Individual Submission
Number of pages: 8

Abstract:
    This document specifies a mechanism for delivering PANA (Protocol for=

    Carrying Authentication for Network Access) AVPs (Attribute-Value
    Pairs) in encrypted form.




The IETF Secretariat



--------------010609040208010200000107
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Content-Transfer-Encoding: quoted-printable

<html>
  <head>

    <meta http-equiv=3D"content-type" content=3D"text/html; charset=3DUTF=
-8">
  </head>
  <body bgcolor=3D"#FFFFFF" text=3D"#000000">
    I would like to move this forward so I am soliciting any comments
    from the PANA mailing list.<br>
    <br>
    Thanks<br>
    <br>
    Robert<br>
    <br>
    -------- Original Message --------
    <table class=3D"moz-email-headers-table" border=3D"0" cellpadding=3D"=
0"
      cellspacing=3D"0">
      <tbody>
        <tr>
          <th align=3D"RIGHT" nowrap=3D"nowrap" valign=3D"BASELINE">Subje=
ct: </th>
          <td>New Version Notification for
            draft-yegin-pana-encr-avp-01.txt</td>
        </tr>
        <tr>
          <th align=3D"RIGHT" nowrap=3D"nowrap" valign=3D"BASELINE">Date:=
 </th>
          <td>Wed, 04 Jan 2012 01:53:07 -0800</td>
        </tr>
        <tr>
          <th align=3D"RIGHT" nowrap=3D"nowrap" valign=3D"BASELINE">From:=
 </th>
          <td><a class=3D"moz-txt-link-abbreviated" href=3D"mailto:intern=
et-drafts@ietf.org">internet-drafts@ietf.org</a></td>
        </tr>
        <tr>
          <th align=3D"RIGHT" nowrap=3D"nowrap" valign=3D"BASELINE">To: <=
/th>
          <td><a class=3D"moz-txt-link-abbreviated" href=3D"mailto:alper.=
yegin@yegin.org">alper.yegin@yegin.org</a></td>
        </tr>
        <tr>
          <th align=3D"RIGHT" nowrap=3D"nowrap" valign=3D"BASELINE">CC: <=
/th>
          <td><a class=3D"moz-txt-link-abbreviated" href=3D"mailto:robert=
=2Ecragie@gridmerge.com">robert.cragie@gridmerge.com</a>, <a class=3D"moz=
-txt-link-abbreviated" href=3D"mailto:alper.yegin@yegin.org">alper.yegin@=
yegin.org</a></td>
        </tr>
      </tbody>
    </table>
    <br>
    <br>
    <pre>A new version of I-D, draft-yegin-pana-encr-avp-01.txt has been =
successfully submitted by Alper Yegin and posted to the IETF repository.

Filename:	 draft-yegin-pana-encr-avp
Revision:	 01
Title:		 Encrypting PANA AVPs
Creation date:	 2012-01-04
WG ID:		 Individual Submission
Number of pages: 8

Abstract:
   This document specifies a mechanism for delivering PANA (Protocol for
   Carrying Authentication for Network Access) AVPs (Attribute-Value
   Pairs) in encrypted form.

                                                                         =
        =20


The IETF Secretariat

</pre>
  </body>
</html>

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Date: Mon, 26 Mar 2012 15:00:31 +0900
From: Yasuyuki Tanaka <yatch@isl.rdc.toshiba.co.jp>
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Subject: Re: [Pana] Fwd: New Version Notification for draft-yegin-pana-encr-avp-01.txt
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Hi,

I've read the draft and I have four comments. Please see them below.

Best,
Yasuyuki Tanaka

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

(1) Section 3
I found a typo in the last sentence.

 >   The length of PANA_ENCR_KEY depends on the integrity algorithm in
 >   use.

should be

     The length of PANA_ENCR_KEY depends on the *encryption* algorithm in
     use.

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

(2) Section 4
I've not found text about key size of AES to be used for
AES_CTR. Probably 128-bit is assumed.

It would be better to clarify the key size to be used for the
algorithm and to use "AES128_CTR" or something instead of "AES_CTR".

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

(3) Section 4
The definition of "q" is different between the draft and NIST
SP800-38C. In this draft, "q" is defined as "octet length of message
length field." But in NIST SP800-38C, "q" is defined as "The octet
length of the binary representation of the octet length of the
payload."

In addition, I don't realize what 'length of message length field'
means... Why is "q" 3? The length of "Message Length" field of PANA
Message Header is 2 octets...

Anyway, I think the following part might cause some confusion.

 >      AES-CTR (Counter) encryption algorithm as specified in
 >      [NIST_SP800_38A].  The formatting function and counter generation
 >      function as specified in Appendix A of [NIST_SP800_38C] are used,
 >      with the following parameters:
 >
 >
 >            n, octet length of nonce, is 12.
 >            q, octet length of message length field, is 3.

IMHO, it's better to say just "q is 3" as the definition of "q".

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

(4) Section 4
It would be very helpful to provide an example of the first counter.

When Key-Id is 0x55667788, Session ID is 0xaabbccdd, and Sequence
Number is 0x11223344, the correct first counter is
0x0255667788aabbccdd11223344000001. is it correct?

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

(2012/03/16 20:04), Robert Cragie wrote:
> I would like to move this forward so I am soliciting any comments from
> the PANA mailing list.
>
> Thanks
>
> Robert
>
> -------- Original Message --------
> Subject: 	New Version Notification for draft-yegin-pana-encr-avp-01.txt
> Date: 	Wed, 04 Jan 2012 01:53:07 -0800
> From: 	internet-drafts@ietf.org
> To: 	alper.yegin@yegin.org
> CC: 	robert.cragie@gridmerge.com, alper.yegin@yegin.org
>
>
>
> A new version of I-D, draft-yegin-pana-encr-avp-01.txt has been successfully submitted by Alper Yegin and posted to the IETF repository.
>
> Filename:	 draft-yegin-pana-encr-avp
> Revision:	 01
> Title:		 Encrypting PANA AVPs
> Creation date:	 2012-01-04
> WG ID:		 Individual Submission
> Number of pages: 8
>
> Abstract:
>     This document specifies a mechanism for delivering PANA (Protocol for
>     Carrying Authentication for Network Access) AVPs (Attribute-Value
>     Pairs) in encrypted form.
>
>
>
>
> The IETF Secretariat
>
>
>
>
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