A method and device for synchronously correcting vulnerability detection in a quantum key distribution system

Abstract

The invention discloses a method and device for detecting synchronization correction vulnerability in a quantum key distribution system, comprising a wavelength division multiplexing module, a signal light delay module, a polarization detection module, and a classical information interception module. Therefore, according to the polarization information, it is selected whether to send an excitation signal to the signal light delay module to delay the signal light, and according to the received excitation signal, it is selected whether to delay the current signal light transmission, and the processed signal light It is sent to the receiver, and the base selection information announced by the transmitter and receiver is eavesdropped in the key distribution stage. The detector can combine the polarization information of the delay selected by the detector to simulate the attack in the synchronization correction process to realize the inference of part of the key. , the invention realizes the detection of the vulnerability by simulating the attack against the synchronization correction vulnerability, and provides a guarantee for the actual security of the quantum key distribution system.

Description

technical field [0001] The invention relates to a general detection method and device for the loopholes existing in the synchronization correction process in a quantum key distribution (QKD) system, and belongs to the technical field of quantum security communication. Background technique [0002] Quantum key distribution (QKD) systems are proven to be information-theoretically secure. However, there are some deviations from the ideal model in the actual engineering implementation of the QKD system. These vulnerabilities give attackers the opportunity to eavesdrop on the keys and threaten the security of the actual QKD system. The realization of the calibration preparation stage before the QKD system runs key distribution belongs to some engineering designs outside the QKD theoretical protocol, so the attacker's attack on this stage can not be protected by the QKD security proof. Specifically, there is a synchronization correction process in the commercial QKD system prepar...

AI Technical Summary

Problems solved by technology

Since such an attack based on the synchronously corrected vulnerability belongs to the forefront of QKD actual device security research, the general commercial QKD system has not yet designed and implemented a corresponding targeted defense scheme, and the system is under the threat of this vulnerability.

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