基于差分相移键控协议的双向量子密钥分配系统研究  

Analysis of differential-phase-shift keying protocol fora two-way quantum-key-distribution system

作　　者：焦荣珍[1] 冯晨旭[1] 

机构地区：[1]北京邮电大学理学院,北京100876

出　　处：《物理学报》2008年第2期685-688,共4页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:60054402)资助的课题.~~

摘　　要：采用差分相移键控(DPSK)协议分析了双向量子密钥分配(QKD)系统的性能,比较了BB84协议、BBM92协议和DPSK协议的安全通信速率与距离的关系,并对协议对抗一些攻击的安全性进行了分析,结果表明DPSK协议对长距离QKD系统非常实用,具有超过200km的通信距离和较高的通信速率.The performance of a two-way quantum-key-distribution （QKD） system are analyzed using the differential-phase-shift keying （DPSK） protocol. The comparison is based on the secure communication rate as a function of distance for three QKD protocols： the Bennett-Brassard 1954, the Bennett-Brassard-Mermin 1992, and the coherent differential-phase-shift keying protocols. We discussed the security of DPSK protocol against any type of individual photon splitting attack and concluded that the simple and efficient DPSK protocol allows for more than 200 km of secure communication distance with high communication rates.

关 键 词：差分相移键控协议 量子效率 通信速率 

分 类 号：O413[理学—理论物理] TN918[理学—物理]