Detector control attack detection method and system

Abstract

A detector control attack detection method is used for detecting detector control attacks in a quantum key distribution system and comprises the steps that a sending end sends quantum states to a receiving end, detectors in the receiving end randomly select different detection efficiencies to measure the quantum states, and measurement results are recorded; at least two counting rates and bit error rates detected by the detector are counted according to the measurement result; and whether the quantum key distribution system is controlled and attacked by the detector or not is judged accordingto the counting rate and the bit error rate of the detector and the normal quantum key distribution condition of the quantum key distribution system. According to the method and the system, whether the quantum key distribution system is controlled and attacked by the detector or not is detected, the method and the system do not depend on defense criteria of a specific detector implementation modeand a coding implementation scheme of the quantum key distribution system, and the method and the system are suitable for BB84 protocols of phase coding and polarization coding.

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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