'Half-quantum' cryptography promises total security

时间:2019-03-01 07:12:02166网络整理admin

By Paul Marks It has been an article of faith among cryptographers that the only way for two parties to transmit sensitive information completely securely is to use quantum cryptography to share the key they use to encrypt the information. Now it seems that the same degree of security is possible even if one party remains firmly rooted in the world of classical physics. The finding could mean simpler and cheaper secure cryptographic systems. In the conventional model that cryptographers propose for quantum key distribution, a sender, known as Alice,