Attack detection method for device defects in discrete quantum key distribution

Abstract

The invention discloses an attack detection method for device defects in discrete quantum key distribution. The attack detection method comprises the following steps: establishing a discrete quantum key distribution system taking InGaAs-based SPAD as a single-photon detection device; carrying out quantum key distribution under normal and attack conditions and acquiring positive and negative sampledata; making a training data set and training to obtain an attack detection classifier; and using the attack detection classifier to monitor discrete quantum key distribution of normal communicationand complete attack detection for device defects. According to the method, wavelet transform is adopted to process a data set, and the data set is amplified to hide details; a network structure combining LSTM with a Batch Normalization layer, a pooling layer, a full connection layer and a softmax layer is adopted, so that the attack detection effect is ensured; therefore, the method provided by the invention can effectively monitor the attack aiming at the defects of the InGaAs-based SPAD device, and is high in reliability and good in accuracy.

Description

technical field [0001] The invention belongs to the field of quantum communication, and in particular relates to an attack detection method for device defects in discrete quantum key distribution. Background technique [0002] With the development of economy and technology and the improvement of people's living standards, data security has become the focus of people's attention. Quantum key distribution has attracted a large number of researchers to participate in the research because of its secure key transmission capability. Quantum key distribution enables legitimate communication parties to share keys securely in an untrusted quantum channel. It mainly uses the uncertainty principle and the quantum state non-cloning theorem to ensure the unconditional security of the communication process. As quantum cryptography becomes increasingly mature and widely used, the practical security of quantum key distribution systems has become a new hotspot in subject research. [0003]...

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Problems solved by technology

Moreover, the three attacks are all designed for the defect of the key device InGaAs-based SPAD device in the discrete variable quantum key distribution system

[0004] In order to solve the above problems, some people have proposed a technical solution of adding temperature sensors or light intensity sensors to monitor related attacks, but this solution introduces additional equipment, which may continue to increase system vulnerabilities, making it difficult to conduct theoretical verification. and other issues, the relevant measures are not obvious; some people have proposed the MDI-QKD system, which theoretically avoids the attack on the detection side, but due to the defects of actual devices, the DVQKD system is still not safe

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