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RFC 9936
Title: Use of ML-KEM in the
Cryptographic Message Syntax (CMS)
Author: P. Julien,
M. Ounsworth,
D. Van Geest
Status: Standards Track
Stream: IETF
Date: March 2026
Mailbox: [email protected],
[email protected],
[email protected]
Pages: 18
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-ietf-lamps-cms-kyber-13.txt
URL: https://www.rfc-editor.org/info/rfc9936
DOI: 10.17487/RFC9936
Module-Lattice-Based Key-Encapsulation Mechanism (ML-KEM) is a
quantum-resistant Key Encapsulation Mechanism (KEM). Three parameter
sets for the ML-KEM algorithm are specified by the US National
Institute of Standards and Technology (NIST) in FIPS 203. In order of
increasing security strength (and decreasing performance), these
parameter sets are ML-KEM-512, ML-KEM-768, and ML-KEM-1024. This
document specifies the conventions for using ML-KEM 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).
This document is a product of the Limited Additional Mechanisms for PKIX and
SMIME Working Group of the IETF.
This is now a Proposed Standard.
STANDARDS TRACK: This document specifies an Internet Standards Track
protocol for the Internet community, and requests discussion and suggestions
for improvements. Please refer to the current edition of the Official
Internet Protocol Standards (https://www.rfc-editor.org/standards) for the
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