多用户网络量子密码术的改进

Improved quantum secret sharing in multi-user quantum communication network

针对经典的利用EPR粒子纠缠态互换的量子密钥传输协议存在的问题,它提出了一个在多用户传输网络中,基于3个粒子的最大纠缠态GHZ安全的量子密钥传输协议。改进的量子密钥传输协议在通信节点与控制中心之间通过多个GHZ对完成该密码的安全分配系统。与经典的利用EPR粒子纠缠态互换的量子密钥传输协议相比,在传输网络中,窃听者Eve如果参与了3方的通信,要获得有用信息,必然要不断的引入错误,于是该网络的节点和控制中心将会发现Eve,保证了改进的多用户网络安全性。

According to the shortcoming of the classical quantum cryptography with ERP states, how this quantum-secret-sharing scheme is implemented within realistic, highly secure multi-user communication network is presented, usinggreenberger-horne-zeilinger （GHZ） states. The quantum communication network marries a variety of GHZ states to well established intemet technology in order to build a secure key distribution system employed in conjunction with the nodes and control centers. In communication network, eavesdropper Eve transmit with three party, useful information is gain, the errors is introduced. The nodes and control centers can fred Eve, the security of multi-user quantum network is ensured,