Round-robin differential quadrature phase-shift quantum key distribution

doi:10.1088/1674-1056/26/2/020303

Abstract Recently, a round-robin differential phase-shift (RRDPS) protocol was proposed [Nature 509, 475 (2014)], in which the amount of leakage is bounded without monitoring the signal disturbance. Introducing states of the phase-encoded Bennett-Brassard 1984 protocol (PE-BB84) to the RRDPS, this paper presents another quantum key distribution protocol called round-robin differential quadrature phase-shift (RRDQPS) quantum key distribution. Regarding a train of many pulses as a single packet, the sender modulates the phase of each pulse by one of 0,π/2,π,3π/2, then the receiver measures each packet with a Mach-Zehnder interferometer having a phase basis of 0 or π/2. The RRDQPS protocol can be implemented with essential similar hardware to the PE-BB84, so it has great compatibility with the current quantum system. Here we analyze the security of the RRDQPS protocol against the intercept-resend attack and the beam-splitting attack. Results show that the proposed protocol inherits the advantages arising from the simplicity of the RRDPS protocol and is more robust against these attacks than the original protocol.

Keywords: round-robin differential phase-shift protocol quantum key distribution intercept-resend attack beam-splitting attack

Received: 01 September 2016
Revised: 17 October 2016
Accepted manuscript online:

PACS:	03.67.Dd	(Quantum cryptography and communication security)
	03.67.Hk	(Quantum communication)
	42.50.Ex	(Optical implementations of quantum information processing and transfer)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61505261 and 11304397) and the National Basic Research Program of China (Grant No. 2013CB338002).

Corresponding Authors: Wan-Su Bao
E-mail: 2010thzz@sina.com

Cite this article:

Chun Zhou(周淳), Ying-Ying Zhang(张莹莹), Wan-Su Bao(鲍皖苏), Hong-Wei Li(李宏伟), Yang Wang(汪洋), Mu-Sheng Jiang(江木生) Round-robin differential quadrature phase-shift quantum key distribution 2017 Chin. Phys. B 26 020303

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