Quantum cryptography

Abstract

Several results in quantum cryptography will be surveyed in this chapter. After a brief introduction to classical cryptography, we provide some cryptographic primitives from the viewpoint of quantum computational complexity theory, which are helpful to get an idea of quantum cryptographic protocols. We then examine cryptographic protocols of quantum key distribution, quantum bit commitment, quantum oblivious transfer, quantum zero-knowledge, quantum public-key encryption, quantum digital signature, and their security issues.