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Quantum key distribution data negotiation method and system based on LDPC-Polar joint coding

A quantum key distribution, LDPC code technology, applied in the field of quantum secure communication, can solve the problems of low negotiation efficiency, high bit error rate, low channel data negotiation efficiency, etc., to reduce the key bit error rate, enrich application scenarios, The effect of improving the efficiency of channel data negotiation

Pending Publication Date: 2021-02-05
STATE GRID FUJIAN ELECTRIC POWER CO LTD +4
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Problems solved by technology

[0005] The present invention takes CV-QKD quantum key distribution as the technical background, and considers the low efficiency of channel data negotiation caused by long-distance communication, proposes a quantum key distribution data negotiation method based on LDPC-Polar joint coding, which fully meets the requirements of It meets the needs of long-distance quantum key distribution, solves the problems of high bit error rate and low negotiation efficiency in long-distance quantum key distribution, further improves the error correction success rate and negotiation efficiency, and ensures the long-distance quantum key distribution. Data Negotiation Efficiency

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  • Quantum key distribution data negotiation method and system based on LDPC-Polar joint coding
  • Quantum key distribution data negotiation method and system based on LDPC-Polar joint coding
  • Quantum key distribution data negotiation method and system based on LDPC-Polar joint coding

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[0040] The present invention will be further described below in conjunction with specific embodiments. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0041] As a data negotiation model of CV-QKD, the structure of the traditional multi-level encoding / multi-level decoding model is as follows: figure 1 shown. The multi-level encoding / multi-level decoding model mainly consists of a multi-level decoder and a multi-level encoder. For a general multi-level coding system, since a certain level of decoding produces an error, and then the error propagates among other levels, it will lead to the phenomenon that the final bit error rate increases. However, this phenomenon does not appear in the multi-level encoding / multi-decoding model, because in the multi-level encoding / multi-decoding model, the encoders at all levels can be flexibly designed, and the com...

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Abstract

The invention discloses a quantum key distribution data negotiation method and system based on LDPC-Polar joint coding. The method and the system are based on a traditional multi-level coding / multi-level decoding model structure, LDPC-Polar joint coding is used as channel coding in multi-level coding, and multi-level coding and multi-level decoding of LDPC-Polar joint coding are carried out. According to the invention, the secret key error rate can be better reduced, the long-distance quantum secret key distribution negotiation efficiency is obviously improved, and the quantum secret key codeforming rate is better improved.

Description

technical field [0001] The invention relates to a quantum key distribution data negotiation method and system based on LDPC-Polar joint coding, and relates to the field of quantum secret communication. Background technique [0002] In Quantum Key Distribution (Quantum Key Distribution, QKD), Alice at the sending end and Bob at the receiving end can finally obtain a string of binary random numbers as a key. However, due to the inevitable noise in the quantum channel, or the existence of eavesdropping interference, there will be some errors in the keys obtained by the two parties in the communication. Therefore, in practical applications, it is necessary to introduce technical means such as data negotiation and secret amplification, so as to ensure that a completely consistent security key is extracted in the case of bit errors due to various noises and eavesdropping, so that the two parties in communication can share error-free key. [0003] There are two types of QKD: disc...

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Application Information

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IPC IPC(8): H04L9/08H04L1/00
CPCH04L9/0852H04L1/0064H04L1/0057H04L1/0041H04L1/005
Inventor 张松磊陈小倩陈人楷卞宇翔冯宝贾玮许奇功张天兵胡倩倩陈均张强强马亚妮
Owner STATE GRID FUJIAN ELECTRIC POWER CO LTD
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