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.
Received: 04 August 2008
Revised: 10 September 2008
Accepted manuscript online:
Fund: Project supported by the Natural
Science Foundation of Beijing, China (Grant No XK100130837).
Cite this article:
Jiao Rong-Zhen(焦荣珍), Feng Chen-Xu(冯晨旭), and Ma Hai-Qiang(马海强) Analysis of the differential-phase-shift-keying protocol in the quantum-key-distribution system 2009 Chin. Phys. B 18 915
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