RFC 2984 · PROPOSED STANDARD · 2000
SUN · 14 JUN 2026
Use of the CAST-128 Encryption Algorithm in CMS
Overview
RFC 2984, “Use of the CAST-128 Encryption Algorithm in CMS”, is a Proposed Standard document published in October 2000 by C. Adams. The canonical text is published by the RFC Editor.
Abstract
This document specifies how to incorporate CAST-128 into the S/MIME Cryptographic Message Syntax (CMS) as an additional algorithm for symmetric encryption. [STANDARDS-TRACK]
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
Read this RFC
The canonical text of RFC 2984 is hosted at rfc-editor.org. Available in TXT,HTML.
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