Synchronization algorithm of quantum key distribution system with protection from unauthorized access

Rumyantsev, Konstantin; Pljonkin, Anton

doi:10.1109/wrap.2015.7805988

Cited by 10 publications

(3 citation statements)

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“…When the entire time frame is analyzed, the time window that has the largest number of triggering (for both PE and DCP) is considered as a signal window, and the other time windows are considered as noise windows (those that do not contain synchronization pulses). A detailed description of the synchronization process is described in [15,17].…”

Section: Synchronization In a Qkdsmentioning

confidence: 99%

“…In [17,19], an algorithm detecting the optical pulse for QKDS was developed. A distinct feature of the algorithm is that it uses attenuated optical pulses as synchronization signal.…”

Section: Synchronization In a Qkdsmentioning

confidence: 99%

“…Synchronization in self-compensating QKDSs consists in the high-accuracy measurement of the path length and propagation path of the optical emission from transceiver station to encoding station and vice versa. In this case, optical signals propagate in both directions in the same fiber-optic line [12][13][14][15][16][17]. It should be noted that, when measuring the total propagation length, one must consider not only the length of quantum channel between two stations but the length of each fiber-optic component inside the stations as well (Figure 1).…”

Section: Synchronization In a Qkdsmentioning

confidence: 99%

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Synchronization in Quantum Key Distribution Systems

2017

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Abstract: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.

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Section: Synchronization In a Qkdsmentioning

confidence: 99%

“…In [17,19], an algorithm detecting the optical pulse for QKDS was developed. A distinct feature of the algorithm is that it uses attenuated optical pulses as synchronization signal.…”

Section: Synchronization In a Qkdsmentioning

confidence: 99%