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

[Magnus Westerlund <[e-mail]>]

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

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Services, Media and Network features, Ericsson Research EAB/TXM
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Ericsson AB                 | Phone  [phone]
Färögatan 6                 | Mobile [phone]
SE-164 80 Stockholm, Sweden | mailto: [e-mail]
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