+1 on this - seeds only please.

> On 1 Apr 2025, at 19:45, Michael Jones <michael_b_jo...@hotmail.com> wrote:
> 
> Thanks for publishing this draft, Orie.  It makes it clear what the treatment 
> for ML-DSA would look like if we choose to support both the seed and expanded 
> private key representations.
>  
> I do question whether COSE and JOSE need both representations.  What is the 
> use case for needing to support the expanded private key representation for 
> COSE and JOSE?
>  
> I know why LAMPS did it - for HSMs signing X.509 certificates.  But that use 
> case doesn't apply to COSE or JOSE.
>  
> Should we back this out and support only the seed representation and have 
> that be the “priv” value, as it was in previous drafts?
>  
> Discussion requested.
>  
>                                                                 Thanks,
>                                                                 -- Mike
>  
> From: Orie Steele <orie@transmute.industries 
> <mailto:orie@transmute.industries>>
> Sent: Tuesday, April 1, 2025 11:13 AM
> To: cose@ietf.org <mailto:cose@ietf.org>
> Subject: [COSE] Re: I-D Action: draft-ietf-cose-dilithium-06.txt
>  
> This version includes the changes to support both "seeds" and "expanded 
> private keys".
> 
> I have also updated the code that generates the examples to give a sense of 
> impact to implementations, have a look here:
> 
> https://github.com/cose-wg/draft-ietf-cose-dilithium/pull/18
> 
> Thanks to Ilari, Simo and Mike Jones for comments on this version.
> 
> I believe there are still some concerns regarding the proposed text, but 
> having -06 to argue over is better than looking at the editors draft in 
> github.
> 
> Regards,
> 
> OS
>  
> On Tue, Apr 1, 2025 at 1:10 PM <internet-dra...@ietf.org 
> <mailto:internet-dra...@ietf.org>> wrote:
> Internet-Draft draft-ietf-cose-dilithium-06.txt is now available. It is a work
> item of the CBOR Object Signing and Encryption (COSE) WG of the IETF.
> 
>    Title:   ML-DSA for JOSE and COSE
>    Authors: Michael Prorock
>             Orie Steele
>             Rafael Misoczki
>             Michael Osborne
>             Christine Cloostermans
>    Name:    draft-ietf-cose-dilithium-06.txt
>    Pages:   19
>    Dates:   2025-04-01
> 
> Abstract:
> 
>    This document describes JSON Object Signing and Encryption (JOSE) and
>    CBOR Object Signing and Encryption (COSE) serializations for Module-
>    Lattice-Based Digital Signature Standard (ML-DSA), a Post-Quantum
>    Cryptography (PQC) digital signature scheme defined in FIPS 204.
> 
> The IETF datatracker status page for this Internet-Draft is:
> https://datatracker.ietf.org/doc/draft-ietf-cose-dilithium/
> 
> There is also an HTML version available at:
> https://www.ietf.org/archive/id/draft-ietf-cose-dilithium-06.html
> 
> A diff from the previous version is available at:
> https://author-tools.ietf.org/iddiff?url2=draft-ietf-cose-dilithium-06
> 
> Internet-Drafts are also available by rsync at:
> rsync.ietf.org <http://rsync.ietf.org/>::internet-drafts
> 
> 
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