A Polar Code-Based Hierarchical Data Coordination Method for Continuous Variable Quantum Key Distribution Systems

Abstract

The invention relates to a layered data coordination method based on a polar code used in a continuous variable quantum key distribution system. The specific implementation steps of the method are as follows, step 1: both legal communication parties hold continuous variables with mutual correlation, and quantify the data of the sender (receiver under reverse coordination) hierarchically to obtain multi-level binary data; steps 2: Disclose the levels that contain less information in the multi-level binary data obtained in step 1, perform polar code inverse coding on the undisclosed data, and disclose the dormant bit positions and corresponding data; step 3: the receiver ( Under the reverse coordination (the sender) uses the public binary data and dormant bit information to perform multi-level inter-level decoding of the polar code on the held continuous variable. The encoding and decoding complexity of the method is low, and the error correction performance is good. The application of the method can obtain higher coordination efficiency, thereby improving the security code rate of the continuous variable quantum key distribution system.

Description

technical field [0001] The invention relates to the key technical field of post-processing of continuous variable quantum key distribution, and mainly relates to a layered data coordination method based on polar codes used in the post-processing of continuous variable quantum key distribution system. This method is especially suitable for data coordination under the condition of high signal-to-noise ratio, and can obtain high coordination efficiency, thereby improving the security code rate of the system. Background technique [0002] Information security is an important means to protect personal and property safety. With the development of high-performance computers, especially the possible realization of quantum supremacy in the near future, traditional classical ciphers based on mathematical computational complexity have been greatly challenged. Quantum cryptography is based on physical principles and has unconditional security. Continuous-Variable Quantum Key Distribut...

AI Technical Summary

Problems solved by technology

With the development of high-performance computers, especially the possible realization of quantum supremacy in the near future, traditional classical ciphers based on mathematical computational complexity have been greatly challenged

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