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A multi-precision decoding device and method for continuous variable quantum key distribution

A quantum key distribution and decoding device technology, which is applied in the field of quantum encryption, can solve the problems of many decoding iterations, very high hardware resource requirements, and high precision requirements, and achieve the effect of improving the decoding speed

Active Publication Date: 2022-03-18
NO 30 INST OF CHINA ELECTRONIC TECH GRP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this scheme requires many decoding iterations and high precision requirements, which leads to very high requirements on hardware resources for decoding, and the decoding rate is severely limited under the condition of limited hardware resources.

Method used

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  • A multi-precision decoding device and method for continuous variable quantum key distribution
  • A multi-precision decoding device and method for continuous variable quantum key distribution
  • A multi-precision decoding device and method for continuous variable quantum key distribution

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Embodiment Construction

[0036]The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0037] refer to figure 1 and figure 2 , the multi-precision decoding device for continuous variable quantum key distribution in the embodiment of the present invention includes a base comparison unit 10, a parameter estimation unit 20, a data discretization unit 30, a multi-precision error correction decoding unit 40 and a private key amplification unit 50 . The multi-precision error correction decoding unit 40 includes an initialization module 41 , k decodin...

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Abstract

The invention discloses a multi-precision decoding device and method for continuous variable quantum key distribution. The device iterates the decoding stage and performs segmented iterations. Different iteration rounds use different precision decoding schemes. Due to Variations in various intermediate process variables in decoding are relatively large. In the early stage of iterative decoding, the main part of this change can be described with a lower precision, but in the latter stage of iterative decoding, due to various The change of the intermediate process variable is small, and this change can be described with higher precision. Therefore, the present invention can increase the decoding speed under limited hardware resources.

Description

technical field [0001] The invention relates to the technical field of quantum encryption, in particular to a multi-precision decoding device and method for continuous variable quantum key distribution. Background technique [0002] With the development of quantum computing technology, classical cryptosystems based on computational complexity face major security risks. Quantum Key Distribution (Quantum Key Distribution, QKD) is a key distribution system based on the principle of quantum physics, which has unconditional security and has attracted extensive attention and research. Continuous Variable Quantum Key Distribution (CV-QKD) uses the regular component of the light field as the carrier of key information. Most of the devices are common to classical coherent optical communication, and it has good compatibility with traditional optical communication networks and is secure. Potential advantages such as high code rate and easy integration are a promising quantum key distr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/08
CPCH04L9/0858
Inventor 李扬徐兵杰马荔杨杰黄伟罗钰杰
Owner NO 30 INST OF CHINA ELECTRONIC TECH GRP CORP