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Open AccessArticle

Synchronization in Quantum Key Distribution Systems

Institute of computer technology and information security, Southern Federal University, Taganrog 347900, Russia
Department of CSE, Jaypee University of Information Technology, Himachal Pradesh 173234, India
Author to whom correspondence should be addressed.
Cryptography 2017, 1(3), 18;
Received: 29 September 2017 / Revised: 27 October 2017 / Accepted: 30 October 2017 / Published: 31 October 2017
(This article belongs to the Special Issue Cryptographic Protocols)
In the description of quantum key distribution systems, much attention is paid to the operation of quantum cryptography protocols. The main problem is the insufficient study of the synchronization process of quantum key distribution systems. This paper contains a general description of quantum cryptography principles. A two-line fiber-optic quantum key distribution system with phase coding of photon states in transceiver and coding station synchronization mode was examined. A quantum key distribution system was built on the basis of the scheme with automatic compensation of polarization mode distortions. Single-photon avalanche diodes were used as optical radiation detecting devices. It was estimated how the parameters used in quantum key distribution systems of optical detectors affect the detection of the time frame with attenuated optical pulse in synchronization mode with respect to its probabilistic and time-domain characteristics. A design method was given for the process that detects the time frame that includes an optical pulse during synchronization. This paper describes the main quantum communication channel attack methods by removing a portion of optical emission. This paper describes the developed synchronization algorithm that takes into account the time required to restore the photodetector’s operation state after the photon has been registered during synchronization. The computer simulation results of the developed synchronization algorithm were analyzed. The efficiency of the developed algorithm with respect to synchronization process protection from unauthorized gathering of optical emission is demonstrated herein. View Full-Text
Keywords: quantum key distribution; single-photon avalanche diode; synchronization; algorithm; detection probability; signal time frame quantum key distribution; single-photon avalanche diode; synchronization; algorithm; detection probability; signal time frame
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Pljonkin, A.; Rumyantsev, K.; Singh, P.K. Synchronization in Quantum Key Distribution Systems. Cryptography 2017, 1, 18.

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