量子网络中多用户量子密钥共享协议

Multiparty Quantum Secret Sharing Protocol in Quantum Communication Network

设计了基于多用户的量子密钥共享协议,该协议在多个用户组成的3个簇中共享多串光子和多个GHZ态。在S簇中,S1,S2,…,Sn-1利用多串光子直接编码,生成包含mN元的量子态,传输给Sn。Sn通过M簇中任选的一个用户Mj,传递给D簇中每一个用户D1,D2,…,Dn。该协议利用现有的手段可以实现。

The paper designs a mutual quantum secure direct communication scheme, which shared a sequence of single photons and greenberger-horne-zeilinger （GHZ states） in the quantum networks. S1, S2, ..., Sn-1 members in cluster S directly encode their respective keys on the states of single photons; then generalizes this situation transmit to the last one of the cluster. Sn encodes the secret message directly on a sequence of particle states and transmits them to D1, D2 Dn supervised via one of the cluster M. It proves that it is unconditionally secure.