Fundamentals of Cryptology : A Professional Reference and Interactive Tutorial (Kluwer International Series in Engineering and Computer Science) (HAR/CDR)

These systems have extremely fast implementations, but sender and receiver have to share a secret key. Public key cryptosystems (the second main area) make it possible to protect data without a prearranged key. The remaining chapters cover a variety of topics, such as zero-knowledge proofs, secret sharing schemes and authentication codes.