RFC 3855 (rfc3855) - Page 1 of 12

Transporting Secure/Multipurpose Internet Mail Extensions (S/MIME) Objects in X

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Network Working Group                                         P. Hoffman
Request for Comments: 3855                                           IMC
Category: Standards Track                                     C. Bonatti
                                                                    IECA
                                                               July 2004


             Transporting Secure/Multipurpose Internet Mail
                  Extensions (S/MIME) Objects in X.400

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 describes protocol options for conveying objects that
   have been protected using the Cryptographic Message Syntax (CMS) and
   Secure/Multipurpose Internet Mail Extensions (S/MIME) version 3.1
   over an X.400 message transfer system.

1. Introduction

   The techniques described in the Cryptographic Message Syntax [CMS]
   specification and message specifications can reasonably be
   transported via a variety of electronic mail systems.  This
   specification defines the options and values necessary to enable
   interoperable transport of S/MIME messages over an X.400 system.

   This document describes a mechanism for using CMS objects as the
   message content of X.400 messages in a native X.400 environment.
   This means that gateways or other functions that expect to deal with
   IPMS, such as those specified in [MIXER] and [BODYMAP], cannot do
   anything with these messages.  Note that cooperating S/MIME agents
   must support common forms of message content in order to achieve
   interoperability.

   Definition of gateway services to support relay of CMS object between
   X.400 and SMTP environments is beyond the scope of this document.




Hoffman & Bonatti           Standards Track
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