Continuous variable quantum key distribution attack detection method and detection system thereof

Abstract

The invention discloses a continuous variable quantum key distribution attack detection method. The method comprises the steps that a sending end modulates signal light and sends the signal light andlocal oscillation light to a receiver; the receiver separates the signal to obtain the signal light and the local oscillation light; the receiver performs real-time granular noise estimation on the signal light; the receiver segments the local oscillation light so that one part of the local oscillation light is used for randomly measuring the value of the regular position X or the canonical momentum P of the received signal light, and the other part of the local oscillation light is used for obtaining a clock signal and local oscillation light power; and the receiver calculates the mean valueof the key data, the variance of the key data, the LO average power and the lens noise variance, and inputs the same into a pre-established attack detection model for detection to obtain an attack detection result in the communication process. The invention also discloses a detection system for realizing the continuous variable quantum key distribution attack detection method. According to the invention, the attack mode detection of the continuous variable quantum key distribution process is realized, the reliability is high, the practicability is good, and the accuracy is high.

Description

technical field [0001] The invention belongs to the field of quantum communication, and in particular relates to a continuous variable quantum key distribution attack detection method and a detection system thereof. Background technique [0002] With the development of economy and technology and the improvement of people's living standards, people pay more and more attention to the security of data. Quantum key distribution (QKD) is one of the important applications of quantum cryptography, which allows two legitimate parties, Alice and Bob, to exchange a public key through an untrusted environment without being eavesdropped by the third-party eavesdropper Eve. Therefore, quantum key distribution is the mainstream data transmission method in the future. [0003] At present, the commonly used key distribution methods in quantum communication include discrete variable (DV) QKD and continuous variable (CV) QKD. CVQKD encodes the quadratic property information of the Gaussian ...

AI Technical Summary

Problems solved by technology

[0006] However, there is no reliable, scientific and highly accurate attack detection method or tool for the quantum key distribution process, which limits the application of the quantum key distribution process.

Images