Re: [AVTCORE] [Sframe] [Moq] FW: New Version Notification for draft-mattsson-cfrg-aes-gcm-sst-00.txt

Hi Roman,

Thanks for the strong support. The first step is to get the algorithm discussed and approved by CFRG. I you want this to happen, make sure to show your support there. I plan to ask for presentation time at CFRG IETF 117. Cryptographically I think the algorithm is very straightforward, proven to be secure, and easy to analyse.

For SFrame, some document (draft-ietf-sframe-enc, draft-mattsson-cfrg-aes-gcm-sst, new draft) would just need to register new ciphersuites. Also easy for DTLS-SRTP Protection Profiles, registration just requires "Specification Reuired" so registration could be done in draft-mattsson-cfrg-aes-gcm-sst or a new document. MIKEY is not used very much, I would skip MIKEY unless some deployment specifically asks for it. I don't think IETF should do any more work on SDES, it is simply not an acceptable security protocol anymore.

Cheers,
John

From: Roman Shpount <[email protected]>
Date: Monday, 8 May 2023 at 23:05
To: Jonathan Lennox <[email protected]>
Cc: Christian Huitema <[email protected]>, John Mattsson <[email protected]>, IRTF CFRG <[email protected]>, [email protected] <[email protected]>, [email protected] <[email protected]>, IETF AVTCore WG <[email protected]>
Subject: Re: [AVTCORE] [Sframe] [Moq] FW: New Version Notification for draft-mattsson-cfrg-aes-gcm-sst-00.txt
This is extremely interesting. I support adopting this.
_____________
Roman Shpount


On Mon, May 8, 2023 at 12:59 PM Jonathan Lennox <[email protected]<mailto:[email protected]>> wrote:
This is interesting for SRTP as well, so I suggest adding the AVTCore mailing list.

> On May 7, 2023, at 2:06 PM, Christian Huitema <[email protected]<mailto:[email protected]>> wrote:
>
> John,
>
> You should probably send this to the QUIC list as well. Media over QUIC is just one application of QUIC. If the "short tags" can save per packet overhead while maintaining security properties, then they are interesting for many QUIC applications.
>
> -- Christian Huitema
>
> On 5/5/2023 7:45 AM, John Mattsson wrote:
>> Hi,
>> We just submitted draft-mattsson-cfrg-aes-gcm-sst-00. Advanced Encryption Standard (AES) with Galois Counter Mode with Secure Short Tags (AES-GCM-SST) is very similar to AES-GCM but have short tags with forgery probabilities close to ideal. The changes to AES-GCM were suggested by Nyberg et al. in 2005 as a comment to NIST and are based on proven theoretical constructions.
>> AES-GCM performance with secure short tags have many applications, one of them is media encryption. Audio packets are small, numerous, and ephemeral, so on the one hand, they are very sensitive in percentage terms to crypto overhead, and on the other hand, forgery of individual packets is not a big concern.
>> Cheers,
>> John
>> From: [email protected]<mailto:[email protected]> <[email protected]<mailto:[email protected]>>
>> Date: Friday, 5 May 2023 at 16:33
>> To: John Mattsson <[email protected]<mailto:[email protected]>>, Alexander Maximov <[email protected]<mailto:[email protected]>>, John Mattsson <[email protected]<mailto:[email protected]>>, Matt Campagna <[email protected]<mailto:[email protected]>>, Matthew Campagna <[email protected]<mailto:[email protected]>>
>> Subject: New Version Notification for draft-mattsson-cfrg-aes-gcm-sst-00.txt
>> A new version of I-D, draft-mattsson-cfrg-aes-gcm-sst-00.txt
>> has been successfully submitted by John Preuß Mattsson and posted to the
>> IETF repository.
>> Name:           draft-mattsson-cfrg-aes-gcm-sst
>> Revision:       00
>> Title:          Galois Counter Mode with Secure Short Tags (GCM-SST)
>> Document date:  2023-05-05
>> Group:          Individual Submission
>> Pages:          16
>> URL:            https://www.ietf.org/archive/id/draft-mattsson-cfrg-aes-gcm-sst-00.txt
>> Status:         https://datatracker.ietf.org/doc/draft-mattsson-cfrg-aes-gcm-sst/
>> Html:           https://www.ietf.org/archive/id/draft-mattsson-cfrg-aes-gcm-sst-00.html
>> Htmlized:       https://datatracker.ietf.org/doc/html/draft-mattsson-cfrg-aes-gcm-sst
>> Abstract:
>>    This document defines the Galois Counter Mode with Secure Short Tags
>>    (GCM-SST) Authenticated Encryption with Associated Data (AEAD)
>>    algorithm.  GCM-SST can be used with any keystream generator, not
>>    just a block cipher.  The main differences compared to GCM [GCM] is
>>    that GCM-SST uses an additional subkey Q, that fresh subkeys H and Q
>>    are derived for each nonce, and that the POLYVAL function from AES-
>>    GCM-SIV is used instead of GHASH.  This enables short tags with
>>    forgery probabilities close to ideal.  This document also registers
>>    several instances of Advanced Encryption Standard (AES) with Galois
>>    Counter Mode with Secure Short Tags (AES-GCM-SST).
>>    This document is the product of the Crypto Forum Research Group.
>> The IETF Secretariat
>
> --
> Sframe mailing list
> [email protected]<mailto:[email protected]>
> https://www.ietf.org/mailman/listinfo/sframe

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