A detection method and system for a detector control attack

Abstract

A detection method for a detector control attack, which is used to detect a detector control attack in a quantum key distribution system, comprising: a sending end sends a quantum state to a receiving end, each detector in the receiving end randomly selects different detection The quantum state is measured, and the measurement results are recorded; according to the measurement results, the count rate and bit error rate detected by the detector are counted, wherein the number of count rate and bit error rate obtained by statistics is at least two; according to the count of the detector Rate and bit error rate and the conditions of normal quantum key distribution of the quantum key distribution system to judge whether the quantum key distribution system is attacked by the detector control. The method and system realize the detection of whether the quantum key distribution system is attacked by the detector control, and do not depend on the defense criterion of the specific detector implementation mode, and do not depend on the coding implementation scheme of the quantum key distribution system. For phase coding and Polarization-encoded BB84-like protocols are applicable.

Description

technical field [0001] The invention relates to the field of quantum secure communication, in particular to a detection method and system for a detector control attack. Background technique [0002] The single-photon detector is an indispensable device in the quantum key distribution system. It is a complex device. The actual characteristics do not match the theoretical characteristics, which may bring security holes, so that the attacker Eve has Opportunity to exploit these vulnerabilities to attack, steal key information, probe control attack is the most serious type of attack. In order to implement the detector control attack, the attacker Eve randomly selects the measurement base to measure the quantum state sent from the sending end Alice, and then uses the attack of a specific optical power to trigger the resend of the optical pulse to the receiving end Bob. Due to the control effect of the attacking light, the final output at Bob's end is almost the same as that of E...

AI Technical Summary

Problems solved by technology

Second, the measurement device has nothing to do with the protocol. Specifically, it requires two independent lasers to achieve two-photon interference. The experimental implementation is difficult and the code rate is lower than the traditional BB84 protocol.

Third, it is mainly for passive monitoring of the actual parameters of the detectors or measurement terminals. Due to the differences in the parameters of different detectors or measurement terminals, there are also differences in the monitoring range.

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