Data coordination method of continuous variable quantum key distribution system

Abstract

The invention discloses a data coordination method of a continuous variable quantum key distribution system. The method comprises the following steps: establishing a Gaussian modulation coherent state continuous variable quantum key distribution system; acquiring sample data of the LDPC code decoding process under different signal-to-noise ratios, and processing the sample data to obtain a sample set; building and training to obtain an LDPC decoder model of the continuous variable quantum key distribution system; and performing data coordination by adopting the trained LDPC decoder model in actual communication. The method is designed for a multi-dimensional coordination process based on the low-density parity check code, a convolutional noise reduction auto-encoder is adopted, non-iterative decoding of the LDPC code is achieved through noise reduction, better error correction performance is achieved, data coordination efficiency is improved, implementation of a neural network can be accelerated through hardware, the implementation speed of data coordination is also increased, and therefore, the working efficiency and the safety of the whole continuous variable quantum key distribution system are improved.

Description

technical field [0001] The invention belongs to the field of quantum communication, and in particular relates to a data coordination method of a continuous variable quantum key distribution system. Background technique [0002] With the development of economy and technology and the improvement of people's living standards, information security has become an issue that people pay more and more attention to. In order to ensure the security of information transmission, the information needs to be encrypted. Because of the "absolute security" characteristics of the distributed keys, the quantum key distribution (QKD) system has become the earliest research field where the principles of quantum physics have been practically applied in the field of cryptography. The "absolute security" of the quantum key distribution (QKD) system comes from the non-cloning principle and measurement collapse theory in quantum mechanics, so it has high military and civilian value. [0003] Accordi...

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Problems solved by technology

[0006] In the process of data coordination, the most complex is error correction. However, the LDPC decoding algorithm currently used has high complexity and slow processing speed, and when there are many error bits in the initial key sequence, error correction will fail. To the expected coordination effect

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