[lamps] Re: I-D Action: draft-ietf-lamps-cms-composite-kem-00.txt

[Daniel Van Geest <[e-mail]>]

The concept for this draft was removed from an earlier adopted version of draft-ietf-lamps-pq-composite-kem with the understanding that it would become a separate draft.  Here is that draft.

The text borrows very heavily from RFC-to-be-9936, so there should not be any major surprises.  The authors believe we made reasonable choices for the algorithms that are used in KEMRecipientInfo with Composite ML-KEM.  Similar to RFC-to-be-9936, these algorithms MUST be supported by implementations; this does not mean that they MUST be used.  We just need a default in there to maximize interoperability.

We are aware of the broken reference to RFC9936.  RFC-to-be-9936 is in AUTH48, I-D.ietf-lamps-cms-kyber wasn't resolving in the bib tool, and I didn't want to manually craft up a reference for something that will be replaced momentarily.

Please take a look.

Daniel Van Geest on behalf of the authors


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Sent: Wednesday, February 25, 2026 6:43 PM
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Subject: [lamps] I-D Action: draft-ietf-lamps-cms-composite-kem-00.txt

Internet-Draft draft-ietf-lamps-cms-composite-kem-00.txt is now available. It
is a work item of the Limited Additional Mechanisms for PKIX and SMIME (LAMPS)
WG of the IETF.

   Title:   Composite ML-KEM for use in Cryptographic Message Syntax (CMS)
   Authors: Daniel Van Geest
            Mike Ounsworth
            John Gray
            Jan Klaussner
   Name:    draft-ietf-lamps-cms-composite-kem-00.txt
   Pages:   21
   Dates:   2026-02-24

Abstract:

   Composite ML-KEM defines combinations of ML-KEM with RSA-OAEP, ECDH,
   X25519, and X448.  This document specifies the conventions for using
   Composite ML-KEM algorithms with the Cryptographic Message Syntax
   (CMS) using the KEMRecipientInfo structure defined in “Using Key
   Encapsulation Mechanism (KEM) Algorithms in the Cryptographic Message
   Syntax (CMS)” (RFC 9629).

The IETF datatracker status page for this Internet-Draft is:
https://fra01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-ietf-lamps-cms-composite-kem%2F&data=05%7C02%7Cdaniel.vangeest%40cryptonext-security.com%7C5128c924512d4d5b4fc108de749de461%7Cda4a2df14b1b489da7f4224b58fd4200%7C0%7C0%7C639076418654340942%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=l%2FuvsXUoqXpnNeGejmxfG8GuE9HLzRH4N3b8DUnNYzM%3D&reserved=0<https://datatracker.ietf.org/doc/draft-ietf-lamps-cms-composite-kem/>

There is also an HTML version available at:
https://fra01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Farchive%2Fid%2Fdraft-ietf-lamps-cms-composite-kem-00.html&data=05%7C02%7Cdaniel.vangeest%40cryptonext-security.com%7C5128c924512d4d5b4fc108de749de461%7Cda4a2df14b1b489da7f4224b58fd4200%7C0%7C0%7C639076418654355299%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=LSFyPlniZsZsRwCuck1iYFfgpUdfvI1dFV8wpCWgGFk%3D&reserved=0<https://www.ietf.org/archive/id/draft-ietf-lamps-cms-composite-kem-00.html>

Internet-Drafts are also available by rsync at:
rsync.ietf.org::internet-drafts


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