A Novel Data Coordination Method for Continuously Variable Quantum Key Distribution

Abstract

The invention discloses a new type of data coordination method for continuous variable quantum key distribution. The amplitude classifiers at the sending end and the receiving end classify the screening data, and the data discrete processing unit at the receiving end performs discretization processing on the classified data and then transmits it to The sending end; the data discrete processing unit at the sending end performs discretization processing on the classified data according to the discrete data sent by the receiving end and then transmits it to the discrete data storage unit; the syndrome calculation unit at the receiving end calculates the syndrome data and sends it to the sending end ; The decoding calculation unit at the sending end performs decoding calculation to obtain the decoding result and transmits it to the receiving end; the key reorganization unit at the sending end and the receiving end performs key reorganization and integration on the decoding result data, and then passes it to the private key amplification unit to obtain Final key data. The present invention adopts a segmented error correction method to increase the code rate of error correction, thereby improving the overall security code rate and decoding efficiency of the CV-QKD system.

Description

technical field [0001] The present invention relates to a novel data coordination 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. [0003] Quantum key distribution technology is mainly divided into discrete variable quantum key distribution (Discrete Variable Quantum key Distribution, DV-QKD) and continuous variable quantum key distribution (Continuous Variable Quantum Key Distribution, CV-QKD) two categories. Compared with DV-QKD, CV-QKD has the advantages of high potential code rate, no need for single photon detectors, and good integration with classic optical fiber communication networ...

AI Technical Summary

Problems solved by technology

For CV-QKD, due to the low signal-to-noise ratio of quantum signals after optical fiber transmission, the code rate of LDPC error correction matrix is ​​limited

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