Optimal eavesdropping in quantum cryptography with six states
Optimal eavesdropping in quantum cryptography with six states
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DOI：
10.1103/physrevlett.81.3018
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发表时间：
1998-10-05
影响因子：
8.6
通讯作者：
Bruss, D
中科院分区：
文献类型：
--
作者：
Bruss, D
讨论了Bennett和Brassard使用三个共轭基（即六个状态）对量子密码协议的推广。通过计算发送者和窃听者之间的最优互信息，表明该方案比基于两个共轭基的方案更安全。我们还解决了广义贝尔不等式中最大经典相关与发送者/接收者和发送者/窃听者之间互信息交集之间的联系问题。
A generalization of the quantum cryptographic protocol by Bennett and Brassard is discussed, using three conjugrate bases, i.e., six states. By calculating the optimal mutual information between sender and eavesdropper it is shown that this scheme is safer against eavesdropping on single qubits than the one based on two conjugate bases. We also address the question for a connection between the maximal classical correlation in a generalized Bell inequality and the intersection of mutual informations between sender/receiver and sender/eavesdropper.