S/MIME Capabilities in X.509 certificates

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Last updated 2004-08-10
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document defines a certificate extension for inclusion of S/MIME capabilities in public key certificates as defined by RFC 3280. S/MIME Capabilities provides a method of broadcasting the cryptographic S/MIME capabilities of the certified subject as a complement to use of S/MIME Capabilities signed attributes as defined in RFC 3851.


Stefan Santesson (stefan@accurata.se)

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