New ASN.1 Modules for CMS and S/MIME

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Last updated 2007-11-08
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


The Cryptographic Message Syntax (CMS) format, and many associated formats, are expressed using ASN.1. The current ASN.1 modules conform to the 1988 version of ASN.1. This document updates those ASN.1 modules to conform to the 2002 version of ASN.1. There are no bits-on-the-wire changes to any of the formats; this is simply a change to the syntax.


Paul Hoffman (
Jim Schaad (

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