Novel data coordination method for continuous variable quantum key distribution

Abstract

The invention discloses a novel data coordination method for continuous variable quantum key distribution. Amplitude classifiers at a sending end and a receiving end classify screening data; a data discrete processing unit at the receiving end performs discretization processing on the classified data and then transmits the data to the sending end; the data discrete processing unit at the sending unit performs discretization processing on the classified data according to the discrete data sent by the receiving end and then transmits the data to a discrete data storage unit; a syndrome computation unit at the receiving end computes to obtain the syndrome data, and sends the same to the sending end; a decoding computation unit at the sending end performs decoding computation to obtain a decoding result to transmit to the receiving end; key reconfiguration units at the sending end and the receiving end performs key reconfiguration and integration on the decoding result data, and then the reconfigured and integrated data is transmitted to a private key amplification unit to obtain the final key data. By adopting a segmented error correction method disclosed by the invention, the code rate for error correction is improved, and the entire safety code rate and the decoding efficiency of a CV-QKD system are improved.

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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