[http://en.wikipedia.org/wiki/Cryptography Cryptography ] as defined by Wikipedia.org.

[http://world.std.com/~reinhold/dicewarefaq.html Diceware FAQ ], fairly plain information about password choice and bit lenght in regards to cryptograph (ei 40 bit, 128 bit, etc).

[http://csrc.nist.gov/CryptoToolkit/aes/aesfact.html Advanced Encryption Standard (AES) FAQ ], the US governments recommendations about encryption, careful, they also allow for the exportation of AES complient systems (which in my mind means they can crack them).

[http://www.cacr.math.uwaterloo.ca/hac/ The Handbook of Applied Cryptography ]