Quantum information processing - Quantum cryptography toward ultimate security

Recent progress in digital computer communication networks has increased th e awareness of the importance of information security technologies for priv ate communications, message authentication, and data protection. NTT Basic Research Laboratories is pushing towards the realization of quantum cryptog raphy, an innovative new concept of cryptography based on the principles of quantum mechanics. If a quantum cryptographic system can be successfully d eveloped, there will be absolutely no possibility of security violations in private communications.