Data Coordination Method for Continuous Variable Quantum Key Distribution System

Abstract

The invention discloses a data coordination method for a continuous variable quantum key distribution system, which includes building a Gaussian modulation coherent state continuous variable quantum key distribution system; obtaining sample data of the LDPC code decoding process under different signal-to-noise ratios and processing the samples set; build and train the LDPC decoder model of the continuous variable quantum key distribution system; use the trained LDPC decoder model for data coordination in actual communication. The invention is designed for the multi-dimensional coordination process based on low-density parity-check codes, adopts a convolutional noise-reduction autoencoder, realizes non-iterative decoding of LDPC codes through noise reduction, achieves better error correction performance, and improves data The efficiency of coordination, and the realization of neural networks can be accelerated through hardware, and the speed of data coordination can also be improved, thereby improving the work efficiency and security of the entire continuous variable quantum key distribution system.

Description

technical field [0001] The invention belongs to the field of quantum communication, in particular 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 a problem that people pay more and more attention to. In order to ensure the security of information transmission, it is necessary to encrypt the information. The quantum key distribution (QKD) system has become the earliest research field in which the principles of quantum physics have been practical in the field of cryptography because of the "absolutely secure" characteristics of the keys distributed. The "absolute security" of the quantum key distribution (QKD) system is derived from the unclonable principle and measurement collapse theory in quantum mechanics, so it has high military and civilian value. [0003] According to the ...

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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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