Secure Electronic Messaging (5)

• S/MIME - Secure/Multipurpose Internet Mail Extension

  • Internet standard: RFC 2311, RFC 2312; developed by RSA in 1996; IETF is working on version 3
  • S/MIME allows users of Web messaging clients (Netscape Messenger) to send encrypted messages and authenticate received messages
  • asymmetric encryption: RSA
  • symmetric encryption: RC2, Triple DES
  • public key size : 1024 bits
  • uses X.509v3 certificates to authenticate owner of the public key

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