论文部分内容阅读
提出了两种基于秘密共享的多方同时量子身份认证(MSQIA)协议.所有用户可以由一个可信第三方(TTP)同时认证.在第一个协议中,TTP利用量子秘密共享与所有用户共享一个密钥K.第i个影子作为第i个用户的认证密钥.当有必要实施MSQIA时,TTP秘密生成一个随机数R且发送给所有用户一序列编码有K和R的单光子.根据各自的影子,每一用户按序对单光子序列实施相应的幺正操作.最后,TTP可以判断假冒者是否存在.第二个协议是第一个协议的变形,具有一环形结构.这两个协议可以高效地用于网络中的MSQIA.它们利用目前的技术是可行的.
Two kinds of MSQIA protocols are proposed based on secret sharing.All the users can be simultaneously authenticated by a trusted third party (TTP) In the first protocol, TTP uses quantum secret sharing to share with all users Key K. The ith shadow is used as the authentication key for the ith user.When it is necessary to implement MSQIA, TTP secretly generates a random number R and sends to all users a sequence of single photons encoded with K and R. According to each Of the shadow, each user in sequence on the single-photon sequence corresponding unitary operation. Finally, TTP can determine the existence of counterfeiters. The second protocol is a variant of the first agreement, with a ring structure. The two protocols Can be used efficiently in the network MSQIA. They are feasible with the current technology.