Estimates for practical quantum cryptography

摘要: In this paper I present a protocol for quantum cryptography which is secure against attacks on individual signals. It based the Bennett-Brassard of 1984. The security proof complete as far use single photons signal states concerned. Emphasis placed practicability resulting protocol. For each run key distribution statement gives probability successful generation and an eavesdropper's knowledge, measured change in Shannon entropy, to be below specified maximal value.