On Mon, 4 Nov 2024 at 19:47, Alicja Kario <[email protected]> wrote:

> Hello,
>
> I don't think we should go back to signing with PKCS#1 v1.5 in TLSv1.3.


> I'm opposed to including those two IDs:
>
>      mldsa44_rsa_pkcs1_sha256 (0x090C),
>      mldsa65_rsa_pkcs1_sha384 (0x090D),
>

I wanted to remove them but I see TLS 1.3 allows rsa_pkcs1 for certificates
but not for certificate verification and it is mandatory to implement
digital signature. I will update the draft to restrict its use to
the "signature_algorithms_cert" extension.

-Tiru


>
> Theoretically we could require the RSA part to still make PSS signatures
> but I think that would be rather hard on the cryptographic backends...
> So I'd rather not have them.
>
> On Sunday, 3 November 2024 01:07:34 CET, tirumal reddy wrote:
> > Hi all,
> >
> > The draft
> > https://datatracker.ietf.org/doc/draft-tls-reddy-composite-mldsa/
> > specifies how ML-DSA in combination with traditional algorithms
> > can be used for authentication in TLS 1.3.
> >
> > Comments and suggestions are welcome.
> >
> > Regards,
> > - Tiru
> >
> > ---------- Forwarded message ---------
> > From: <[email protected]>
> > Date: Sun, 3 Nov 2024 at 05:33
> > Subject: New Version Notification for
> draft-tls-reddy-composite-mldsa-00.txt
> > To: Tirumaleswar Reddy.K <[email protected]>, John Gray
> > <[email protected]>, Scott Fluhrer <[email protected]>,
> > Timothy Hollebeek <[email protected]>
> >
> >
> > A new version of Internet-Draft draft-tls-reddy-composite-mldsa-00.txt
> has
> > been successfully submitted by Tirumaleswar Reddy and posted to the
> > IETF repository.
> >
> > Name:     draft-tls-reddy-composite-mldsa
> > Revision: 00
> > Title:    Use of Composite ML-DSA in TLS 1.3
> > Date:     2024-11-02
> > Group:    Individual Submission
> > Pages:    8
> > URL:
> > https://www.ietf.org/archive/id/draft-tls-reddy-composite-mldsa-00.txt
> > Status:
> https://datatracker.ietf.org/doc/draft-tls-reddy-composite-mldsa/
> > HTML:
> >  https://www.ietf.org/archive/id/draft-tls-reddy-composite-mldsa-00.html
> > HTMLized:
> > https://datatracker.ietf.org/doc/html/draft-tls-reddy-composite-mldsa
> >
> >
> > Abstract:
> >
> >    This document specifies how the post-quantum signature scheme ML-DSA
> >    [FIPS204], in combination with traditional algorithms RSA-
> >    PKCS#1v1.5,RSA-PSS, ECDSA, Ed25519, and Ed448 can be used for
> >    authentication in TLS 1.3.  The composite ML-DSA approach is
> >    beneficial in deployments where operators seek additional protection
> >    against potential breaks or catastrophic bugs in ML-DSA.
> >
> >
> >
> > The IETF Secretariat
> >
> >
> >
>
> --
> Regards,
> Alicja (nee Hubert) Kario
> Principal Quality Engineer, RHEL Crypto team
> Web: www.cz.redhat.com
> Red Hat Czech s.r.o., Purkyňova 115, 612 00, Brno, Czech Republic
>
>
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