Re: [AVTCORE] Summary of discussion with IESG and call for consensus regarding AES-GCM draft

["Igoe, Kevin M." <[e-mail]>]

So let it be written so let it be done.  I'm currently working on producing the test
vectors with copious intermediate outputs that one of the contributors requested.

> -----Original Message-----
> From: Magnus Westerlund [mailto:[e-mail]]
> Sent: Tuesday, March 17, 2015 3:45 AM
> To: IETF AVTCore WG
> Cc: [e-mail]
> Subject: Re: [AVTCORE] Summary of discussion with IESG and call for consensus regarding AES-GCM draft
> 
> WG,
> 
> I note that the deadline is past and no one has opposed the proposal.
> There was discussion about the payload length vs number of payloads that could be sent while staying within NIST's recommendation
> for the algorithm when using the 64 bit authentication tag option. To my understanding the discussion concluded in a
> recommendation to make clear that as long as you don't have payloads longer than 2^15 one only need to rekey as often as SRTP
> requires due to wrapping of extended sequence number used.
> 
> Authors, please prepare an update draft with only AES-GCM and submit it as soon as possible.
> 
> Cheers
> 
> Magnus Westerlund
> (As WG chair)
> 
> On 2015-03-02 12:53, Magnus Westerlund wrote:
> > WG,
> >
> > Last Thursday Kevin Igoe and I participated in a phone conference with
> > IESG to discuss the way forward with draft-ietf-avtcore-srtp-aes-gcm.
> >
> > After some discussion the conclusion was the following:
> >
> > 1. Proposal to remove AES-CCM modes from the draft, if clear need
> > arise a AES-CCM only separate draft can be created. But, that will not
> > be done without clear motivation for why CCM is needed. So if you
> > think CCM is required, please step up and comment on this.
> >
> > 2. The AES-GCM draft is proposed to contain the following configurations:
> >
> >        AEAD_AES_128_GCM     (with 16 byte authentication tag)
> >        AEAD_AES_128_GCM_64  (with 8 byte authentication tag)
> >        AEAD_AES_256_GCM     (with 16 byte authentication tag)
> >
> >
> > If any one in the WG has issues with either of these proposals, please
> > comment on this no later than 16th of March.
> >
> > Cheers
> >
> > Magnus Westerlund
> >
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> >
> 
> 
> --
> 
> Magnus Westerlund
> 
> ----------------------------------------------------------------------
> Services, Media and Network features, Ericsson Research EAB/TXM
> ----------------------------------------------------------------------
> Ericsson AB                 | Phone  [phone]
> Färögatan 6                 | Mobile [phone]
> SE-164 80 Stockholm, Sweden | mailto: [e-mail]
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