Re: [kitten] I-D Action: draft-ietf-kitten-aes-cts-hmac-sha2-10.txt

The new draft-ietf-kitten-aes-cts-hmac-sha2 includes changes for all of
Ben's comments. As for the KDF, we looked at both simply inserting a 0x00
between the "prf" and the octet string (leaving the extra 0x00 before the
length bits intact), and fixing the KDF so that the prf was computed the
same way as any other KDF. So in the end we decided that the cleanest and
least likely to confuse option was to fix the KDF definition in Section 3
by adding an optional context field.

Mike J

On Tue, Jul 5, 2016 at 2:00 PM, <internet-drafts@ietf.org> wrote:

>
> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> This draft is a work item of the Common Authentication Technology Next
> Generation of the IETF.
>
>         Title           : AES Encryption with HMAC-SHA2 for Kerberos 5
>         Authors         : Michael J. Jenkins
>                           Michael A. Peck
>                           Kelley W. Burgin
>         Filename        : draft-ietf-kitten-aes-cts-hmac-sha2-10.txt
>         Pages           : 17
>         Date            : 2016-07-05
>
> Abstract:
>    This document specifies two encryption types and two corresponding
>    checksum types for Kerberos 5.  The new types use AES in CTS mode
>    (CBC mode with ciphertext stealing) for confidentiality and HMAC with
>    a SHA-2 hash for integrity.
>
>
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-kitten-aes-cts-hmac-sha2/
>
> There's also a htmlized version available at:
> https://tools.ietf.org/html/draft-ietf-kitten-aes-cts-hmac-sha2-10
>
> A diff from the previous version is available at:
> https://www.ietf.org/rfcdiff?url2=draft-ietf-kitten-aes-cts-hmac-sha2-10
>
>
> 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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>

-- 
Mike Jenkins
mjjenki@tycho.ncsc.mil - if you want me to read it only at my desk
m.jenkins.364706@gmail.com - to read everywhere
443-634-3951