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Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.1 Message Specification (RFC3851)

IP.com Disclosure Number: IPCOM000029951D
Original Publication Date: 2004-Jul-01
Included in the Prior Art Database: 2004-Jul-20
Document File: 37 page(s) / 80K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

B. Ramsdell: AUTHOR [+2]

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.

This text was extracted from an ASCII text file.
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Network Working Group                                B. Ramsdell, Editor

Request for Comments: 3851                                Sendmail, Inc.

Obsoletes: 2633                                                July 2004

Category: Standards Track

   Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.1

                         Message Specification

Status of this Memo

   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 "Internet

   Official Protocol Standards" (STD 1) for the standardization state

   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2004).

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.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  2

       1.1.  Specification Overview . . . . . . . . . . . . . . . . .  3

       1.2.  Terminology. . . . . . . . . . . . . . . . . . . . . . .  3

       1.3.  Definitions. . . . . . . . . . . . . . . . . . . . . . .  4

       1.4.  Compatibility with Prior Practice of S/MIME. . . . . . .  5

       1.5.  Changes Since S/MIME v3. . . . . . . . . . . . . . . . .  5

   2.  CMS Options. . . . . . . . . . . . . . . . . . . . . . . . . .  5

       2.1.  DigestAlgorithmIdentifier. . . . . . . . . . . . . . . .  5

       2.2.  SignatureAlgorithmIdentifier . . . . . . . . . . . . . .  6

       2.3.  KeyEncryptionAlgorithmIdentifier . . . . . . . . . . . .  6

       2.4.  General Syntax . . . . . . . . . . . . . . . . . . . . .  6

       2.5.  Attributes and the SignerInfo Type . . . . . . . . . . .  7

       2.6.  SignerIdentifier SignerInfo Type . . . . . . . . . . . . 11

       2.7.  ContentEncryptionAlgorithmIdentifier . . . . . . . . . . 12

   3.  Creating S/MIME Messages . . . . . . . . . . . . . . . . . . . 14

Ramsdell                    Standards Track                     [Page 1]

RFC 3851            S/MIME 3.1 Message Specification           July 2004

       3.1.  Preparing the MIME Entity for Signing, Enveloping

             or Compressing . . . . . . . . . . . . . . . . . . . . . 14

       3.2.  The application/pkc...