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Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 4.0 Message Specification
draft-turner-lamps-rfc8551bis-00

Document Type Replaced Internet-Draft (lamps WG)
Expired & archived
Authors Blake C. Ramsdell , Sean Turner
Last updated 2026-06-11 (Latest revision 2026-05-27)
Replaced by draft-ietf-lamps-rfc8551bis
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Formats
Additional resources Mailing list discussion
Stream WG state Adopted by a WG
Document shepherd (None)
IESG IESG state Replaced by draft-ietf-lamps-rfc8551bis
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This Internet-Draft is no longer active.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:

Abstract

This document defines Secure/Multipurpose Internet Mail Extensions (S/MIME) version 4.0. S/MIME provides a consistent way to send and receive secure MIME data. Digital signatures provide authentication, message integrity, and non-repudiation with proof of origin. Encryption provides data confidentiality. Compression can be used to reduce data size. This document obsoletes RFC 5751.

Authors

Blake C. Ramsdell
Sean Turner

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