具有双向身份认证功能的量子密钥分发协议

提出了一种具有身份认证功能的量子密钥分发协议。该协议利用Bell态纠缠交换特性、Bell基测量和按位异或运算，可以高效完成通信双方的身份认证；身份认证完成后，通信双方对手中粒子进行Pauli操作，能得到与对方拥有一样的Bell态粒子；通信双方按照约定的编码规则，得到相同二进制字符串作为密钥。分析表明，提出的密钥分发协议过程简单、操作容易实现，协议的安全性也能得到保证。

Quantum key distribution protocol with two-way authentication

This paper proposed a quantum key distribution protocol with identity authentication function. It utilized the Bell state entanglement switching feature, Bell-based measurement and bitwise XOR operation to efficiently complete identity authentication of both parties. After identity authentication was completed, communication was completed. The Pauli operation of the particles in both opponents could obtain the same Bell state particle as the other party; the communicating partied obtain the same binary string as the key according to the agreed encoding rules. The analysis shows that the proposed key distribution protocol is simple, easy to implement, and the security of the protocol can be guaranteed.