S/MIME
- RFC 2633: S/MIME Version 3 Message Specification
ftp://ftp.ietf.org/rfc/rfc2633.txt - S/MIME Mail Security (smime) Charter (IETF Group)
http://www.ietf.org/html.charters/smime-charter.html
The S/MIME Working Group has completed five Proposed Standards that comprise the S/MIME version 3 specification. Current efforts build on these base specifications