References

• The International PGP Home Page
• GNU Privacy Guard (also known as GnuPG or GPG)
• The OpenPGP public key server
• Where To Get PGP (this also gives some insight into the legal troubles that limit older versions of PGP)
• The RSA Laboratories Cryptography FAQ (extremely well written, but a little bit technical)
• The sci.crypt Cryptography FAQ (well written, but quite technical; recommended only for those with a strong mathematical background)
• The book Applied Cryptography: Protocols, Algorithms, and Source Code in C by Bruce Schneier (published by John Wiley & Sons, ISBN: 0471117099) is widely considered the best introduction to the science of cryptography, by one of the experts in the field.