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[TLS] Re: ML-DSA in TLS

"Salz, Rich" <rsalz@akamai.com> Wed, 20 November 2024 16:00 UTC

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From: "Salz, Rich" <rsalz@akamai.com>
To: Deirdre Connolly <durumcrustulum@gmail.com>, "aebecke@uwe.nsa.gov" <aebecke@uwe.nsa.gov>
Thread-Topic: [TLS] Re: ML-DSA in TLS
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Date: Wed, 20 Nov 2024 16:00:21 +0000
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Subject: [TLS] Re: ML-DSA in TLS
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> In other words, does CNSA 2.0 tolerate ECC, by effectively ignoring its presence, or not?

From https://www.ietf.org/archive/id/draft-becker-cnsa2-tls-profile-00.html<https://urldefense.com/v3/__https:/www.ietf.org/archive/id/draft-becker-cnsa2-tls-profile-00.html__;!!GjvTz_vk!SIN74gSQMUoWRe2HgrSGcavXlJIBFbOVXhs32GuIxGoHhszT7qcuZVdMddF_GTVjmxOQzvSRSsYJXL2gT1s03A$>:

"In order to meet the goal of a consistent security level for the entire cipher suite, CNSA TLS implementations MUST only use the algorithms listed in this document." That's ML-KEM-1024 and ML-DSA-87 only.
It would be better if that statement were in the official CNSA document [1], such as a FAQ or something, and not in an IETF document submitted by an individual. For example in the CNSA 2.0 FAQ [2] there is a section on “Hybrids” in the which gives a subtly different opinion.  Taken together, my answer to Andrey is “it seems to, yes” Perhaps we can get official clarification?
[1] https://media.defense.gov/2022/Sep/07/2003071834/-1/-1/0/CSA_CNSA_2.0_ALGORITHMS_.PDF
[2] FAQ https://media.defense.gov/2022/Sep/07/2003071836/-1/-1/1/CSI_CNSA_2.0_FAQ_.PDF

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