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Influence of multi-photon pulses on practical differential-phase-shift quantum key distribution |
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| Authors: | Zhao Feng Fu Ming-Xing Lu Yi-Qun Liu Song-Hao |
| Affiliation: | Laboratory of Photonic Information Technology, School for Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China; 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) isanalysed. 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 distanceas long as we select an appropriate mean photon number. Also, the maximum mean photon number under BS attackin practical DPS-QKD system and the set of practical assumptions about Eve’s capabilities are presented. |
| Keywords: | multi-photon pulses differential-phase-shift quantum key distribution PNS attack BS attack |
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