... Security Theory and Practice. Springer 2009Chapter 5 Network Security Protocols in Practice Part II J. Wang. Computer Network Security Theory and Practice. Springer 2009S/MIMESecure Multipurpose ... (Kc1, Kc2, Kc3) = (Kc,HMAC, Kc,E, IVc) (protect packets from client to server)Group II: (Ks1, Ks2, Ks3) = (Ks,HMAC, Ks,E, IVs) (protect packets from server to client) ... ExtensionCreated to deal with short comings of PGP Support for multiple formats in a message, not just ASCII text Support for IMAP (Internet Mail Access Protocol) Support for multimedia Similar...