... determination, and luck Cryptanalysts are also called attackers Cryptology embraces both cryptography and cryptanalysis Strong cryptography “There are two kinds of cryptography in this world: cryptography ... (Again, any change to the information results in a totally different digest.) An Introduction to Cryptography 19 The Basics of Cryptography Then PGP uses the digest and the private key to create ... they can write good cryptographic software And why not? After all, it seems intuitively easy to so And their software seems to work OK An Introduction to Cryptography 45 Phil Zimmermann on PGP Anyone...