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Data coordination method of continuous variable quantum key distribution system

A quantum key distribution and quantum key technology, which is applied in the field of data coordination of continuous variable quantum key distribution systems, and can solve problems such as slow processing speed, high complexity, and error correction failures.

Active Publication Date: 2021-09-07
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Data coordination method of continuous variable quantum key distribution system
  • Data coordination method of continuous variable quantum key distribution system
  • Data coordination method of continuous variable quantum key distribution system

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Embodiment Construction

[0050] Such as figure 1 Shown is the schematic flow chart of the method of the present invention; The data coordination method of this continuous variable quantum key distribution system provided by the present invention comprises the following steps:

[0051] S1. Build a Gaussian modulation coherent state continuous variable quantum key distribution system; specifically, it includes a quantum key sending end, a quantum key receiving end and a quantum key post-processing end; the quantum key sending end uses a pulsed laser to generate a relevant light source, and the repetition rate for f req ; Then Gaussian modulation is performed on the generated coherent optical signal, and each coherent state has x A and p A two components, x A is the regular amplitude, p A is a regular phase, and the modulation variance is V A ; The modulated coherent state is transmitted to the quantum key receiving end through the noisy quantum channel, and the transmission rate of the noisy quantu...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08H04L1/00G06N3/04G06N3/08
CPCH04L9/0852H04L1/0061G06N3/08G06N3/048G06N3/045Y02D30/70
Inventor 王一军谢珺黄端
Owner CENT SOUTH UNIV
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