Secure/Multipurpose Internet Mail Extensions Version 3.1 Message Specification
RFC 3851, “Secure/Multipurpose Internet Mail Extensions Version 3.1 Message Specification”, is a Proposed Standard document published in July 2004 by B. Ramsdell. It obsoletes RFC 2633. It has been obsoleted by RFC 5751 — refer to the newer document for the authoritative version. The canonical text is published by the RFC Editor.
Abstract
This document defines Secure/Multipurpose Internet Mail Extensions (S/MIME) version 3.1. 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 2633. [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.
The canonical text of RFC 3851 is hosted at rfc-editor.org. Available in TXT,HTML.
- RFC 3850 Secure/Multipurpose Internet Mail Extensions Version 3.1 Certificate Handling
- RFC 3852 Cryptographic Message Syntax
- RFC 3849 IPv6 Address Prefix Reserved for Documentation
- RFC 3853 S/MIME Advanced Encryption Standard Requirement for the Session Initiation Protocol
- RFC 3848 ESMTP and LMTP Transmission Types Registration
- RFC 3854 Securing X.400 Content with Secure/Multipurpose Internet Mail Extensions
- RFC 3847 Restart Signaling for Intermediate System to Intermediate System
- RFC 3855 Transporting Secure/Multipurpose Internet Mail Extensions Objects in X.400