Semiquantum Key Distribution Using Entangled States

被引:77
作者
Wang Jian [1 ]
Zhang Sheng [1 ]
Zhang Quan [1 ]
Tang Chao-Jing [1 ]
机构
[1] Natl Univ Def Technol, Sch Elect Sci & Engn, Changsha 410073, Hunan, Peoples R China
基金
中国国家自然科学基金;
关键词
QUANTUM CRYPTOGRAPHY; BELL THEOREM;
D O I
10.1088/0256-307X/28/10/100301
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Recently, Boyer et al. presented a novel semiquantum key distribution protocol [Phys. Rev. Lett. 99 (2007) 140501] by using four quantum states, each of which is randomly prepared in the.. or.. basis. Here we present a semiquantum key distribution protocol by using maximally entangled states in which quantum Alice shares a secret key with classical Bob. Quantum Alice has the ability to prepare Bell states and perform Bell basis or computational basis measurement. Classical Bob is restricted to measuring, preparing a particle in the computational basis, reflecting or reordering the particles. The qubit efficiency of the protocol improves to 50% and the protocol can be modified to a measure-resend protocol or a protocol without quantum memory. We also show that the protocol is secure against eavesdropping.
引用
收藏
页数:4
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