Quantum Overloading Cryptography Using Single-Photon Nonlocality  

作　　者：谭勇刚 蔡庆宇 史庭云 

机构地区：[1]State Key Laboratory of Magnetic Resonances and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071 [2]Graduate School of the Chinese Academy of Sciences, Beijing 100049

出　　处：《Chinese Physics Letters》2007年第8期2177-2180,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 10504039, and the Foundation of 0ne Hundred Talent Project of Chinese Academy of Sciences.

摘　　要：Using the single-photon nonlocality, we propose a quantum novel overloading cryptography scheme, in which a single photon carries two bits information in one-way quantum channel. Two commutative modes of the single photon, the polarization mode and the spatial mode, are used to encode secret information. Strict time windows are set to detect the impersonation attack. The spatial mode which denotes the existence of photons is noncommutative with the phase of the photon, so that our scheme is secure against photon-number-splitting attack. Our protocol may be secure against individual attack.Using the single-photon nonlocality, we propose a quantum novel overloading cryptography scheme, in which a single photon carries two bits information in one-way quantum channel. Two commutative modes of the single photon, the polarization mode and the spatial mode, are used to encode secret information. Strict time windows are set to detect the impersonation attack. The spatial mode which denotes the existence of photons is noncommutative with the phase of the photon, so that our scheme is secure against photon-number-splitting attack. Our protocol may be secure against individual attack.

关 键 词：SECURE COMMUNICATION STATES INFORMATION SCHEME 

分 类 号：O43[机械工程—光学工程]