不需要经典信道的量子密钥分配协议

Quantum key Distribution Protocol without Classical Channel

量子密钥分配协议是目前实现密钥分配最安全的方法。通常的量子密钥分配协议都需要一个辅助的经典信道来生成量子密钥。本文提供了一个利用GHZ态的量子密钥分配协议,它不需要辅助的经典信道就可以生成和分配密钥。我们证明了该协议是安全的,没有攻击者可以窃取密钥而不被发现。

Quantum key distribution is the most secure scheme to distributing keys since now. In previous quantum key distribution protocols a auxiliary classical channel is needed. Here we provide a quantum key distribution protocol based on the correlations of the Greenburger-Horne-Zeilinger（GHZ） state. No classic.al channel is needed in the process of the establishment of the key. We prove that the protocol is secure. No eavedroppcrs can get the key without being found.