中国物理B ›› 2009, Vol. 18 ›› Issue (3): 915-917.doi: 10.1088/1674-1056/18/3/012

• GENERAL • 上一篇    下一篇

Analysis of the differential-phase-shift-keying protocol in the quantum-key-distribution system

焦荣珍, 冯晨旭, 马海强   

  1. Science School, Beijing University of Post and Telecommunication, Beijing 100876, China
  • 收稿日期:2008-08-04 修回日期:2008-09-10 出版日期:2009-03-20 发布日期:2009-03-20
  • 基金资助:
    Project supported by the Natural Science Foundation of Beijing, China (Grant No XK100130837).

Analysis of the differential-phase-shift-keying protocol in the quantum-key-distribution system

Jiao Rong-Zhen(焦荣珍), Feng Chen-Xu(冯晨旭), and Ma Hai-Qiang(马海强)   

  1. Science School, Beijing University of Post and Telecommunication, Beijing 100876, China
  • Received:2008-08-04 Revised:2008-09-10 Online:2009-03-20 Published:2009-03-20
  • Supported by:
    Project supported by the Natural Science Foundation of Beijing, China (Grant No XK100130837).

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摘要： The analysis is based on the error rate and the secure communication rate as functions of distance for three quantum-key-distribution (QKD) protocols: the Bennett--Brassard 1984, the Bennett--Brassard--Mermin 1992, and the coherent differential-phase-shift keying (DPSK) protocols. We consider the secure communication rate of the DPSK protocol against an arbitrary individual attack, including the most commonly considered intercept-resend and photon-number splitting attacks, and concluded that the simple and efficient differential-phase-shift-keying protocol allows for more than 200 km of secure communication distance with high communication rates.

Abstract: The analysis is based on the error rate and the secure communication rate as functions of distance for three quantum-key-distribution (QKD) protocols: the Bennett--Brassard 1984, the Bennett--Brassard--Mermin 1992, and the coherent differential-phase-shift keying (DPSK) protocols. We consider the secure communication rate of the DPSK protocol against an arbitrary individual attack, including the most commonly considered intercept-resend and photon-number splitting attacks, and concluded that the simple and efficient differential-phase-shift-keying protocol allows for more than 200 km of secure communication distance with high communication rates.

Key words: differential-phase-shift keying protocol, communication rate, error rate

中图分类号:  (Quantum cryptography and communication security)

  • 03.67.Dd
84.40.Ua (Telecommunications: signal transmission and processing; communication satellites) 03.67.Hk (Quantum communication)