14 Electronic Mail Security
The first thing that springs to mind with the phrase email security is a message from Alice to Bob signed by Alice with her private key and encrypted with Bob’s public key. Lotus Notes had a proprietary, widely deployed implementation of encrypted email in 1989. PGP was created and released as open source by Phil Zimmermann in 1991. Various email standards for user-to-user signed and encrypted email were developed over twenty years ago, including
PEM [RFC 1421—Feb 1993]
PGP/GPG [RFC 2015—October 1996]
S/MIME [RFC 2311—March 1998]
In the early 1990s, there were deployment barriers such as export controls and patents, but these have been resolved. So it is somewhat astonishing that none of these, or anything implementing ...
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