An optimal code rate adaptive method and device suitable for cv-qkd
A CV-QKD and optimal code rate technology, applied in the field of information security, can solve problems such as security code rate constraints, 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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However, the frame error rate (FrameError Rate, FER) also restricts the safe bit rate
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[0043]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.
[0044] refer to figure 1 , the optimal code rate adaptive method applicable to CV-QKD of the embodiment of the present invention comprises the following steps:
[0045] S1: Generate a parity check matrix according to a preset code length and a preset degree distribution function, and obtain the data to be coordinated that meets the target signal-to-noise ratio.
[0046] The degree distribution function can be expressed as:
[0047] v(r,x)=∑v b,d r b x d
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The invention discloses an optimal code rate self-adaptive method and device suitable for CV-QKD. The method includes: generating a parity check matrix according to a preset code length and a preset degree distribution function, and obtaining a check matrix that meets the target signal-to-noise ratio The data to be coordinated; the function curve of the frame error rate is obtained by decoding the data to be coordinated through the check matrix under multiple different preset signal-to-noise ratios, and the function curve is fitted to obtain the fitting result; calculated according to the fitting result The optimal coordination efficiency is obtained, and the optimal signal-to-noise ratio is calculated according to the optimal coordination efficiency; under the optimal signal-to-noise ratio, the standard signal-to-noise ratio parameter is selected to perform adaptive decoding on the data to be coordinated to achieve the optimal security code rate, The invention can determine the optimal safe code rate according to the working conditions of the system, and give full play to the performance of the system.
Description
technical field [0001] The invention relates to the technical field of information security, in particular to an optimal code rate adaptive method and device suitable for CV-QKD. Background technique [0002] Information security is the theme of the information age. Cryptography technology provides a guarantee for information security. With the development of quantum computing technology, it poses a threat to the existing classical cryptographic technology based on the assumption of computational complexity. It is urgent to develop new cryptographic technology. Quantum Key Distribution (Quantum Key Distribution, QKD) is based on the principle of quantum mechanics, which can realize provably secure real-time and remote key agreement, and the combined "one-time secret" can realize unconditionally secure secure communication. It is the field of quantum information and secure communication. one of the research hotspots. Its technical route is mainly divided into discrete variab...
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IPC IPC(8): H04L9/08H04L1/00
CPCH04L9/0852H04L9/0858H04L1/0045H04L1/004H04L1/005
Inventor 马荔徐兵杰李扬杨杰黄伟罗钰杰
Owner NO 30 INST OF CHINA ELECTRONIC TECH GRP CORP