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Encryption Key Derivation in the Cryptographic Message Syntax (CMS) using HKDF with SHA-256

Document Type Replaced Internet-Draft (lamps WG)
Expired & archived
Author Russ Housley
Last updated 2024-01-29 (Latest revision 2024-01-03)
Replaced by draft-ietf-lamps-cms-cek-hkdf-sha256
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Additional resources Mailing list discussion
Stream WG state Adopted by a WG
Document shepherd (None)
IESG IESG state Replaced by draft-ietf-lamps-cms-cek-hkdf-sha256
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


This document specifies the derivation of the content-encryption key or the content-authenticated-encryption key in the Cryptographic Message Syntax (CMS). The use of this mechanism provides protection against where the attacker manipulates the content-encryption algorithm identifier or the content-authenticated-encryption algorithm identifier.


Russ Housley

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)