Influence of multi-photon pulses on practical differential-phase-shift quantum key distribution
Zhao Feng(赵峰)a)b), Fu Ming-Xing(傅明星)b), Lu Yi-Qun(路轶群)a)†, and Liu Song-Hao(刘颂豪)a)
a Laboratory of Photonic Information Technology, School for Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China; b Department of Electronic and Information Engineering, Shaanxi University of Technology, Hanzhong 723003, China
Abstract The influence of multi-photon pulses on practical differential-phase-shift quantum key distribution (DPS-QKD) is analysed. We have estimated the information which Eve obtained by PNS (photon-number splitting) attack and BS (beam splitting) attack. The result indicates that the PNS attack and BS attack will not limit the transmission distance as long as we select an appropriate mean photon number. Also, the maximum mean photon number under BS attack in practical DPS-QKD system and the set of practical assumptions about Eve’s capabilities are presented.
Zhao Feng(赵峰), Fu Ming-Xing(傅明星), Lu Yi-Qun(路轶群), and Liu Song-Hao(刘颂豪) Influence of multi-photon pulses on practical differential-phase-shift quantum key distribution 2007 Chinese Physics 16 3402
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