电讯技术2025，Vol.65Issue(9)：1511-1519,9.DOI:10.20079/j.issn.1001-893x.240314005
基于第三种改进水平交叉算法的物理层密钥生成方案
A Physical Layer Key Generation Scheme Based on Third Modified Level Crossing Algorithm
郑添元 1仇英辉1
作者信息
- 1. 华北电力大学 电气与电子工程学院,北京 102206
- 折叠
摘要
Abstract
Physical layer key generation technology uses physical layer characteristics to generate highly random keys.In view of the mutual constraints between key generation rate and key consistency and the problem that information is easily leaked through the common channel in the existing physical layer key generation schemes,a high consistency physical key generation scheme based on the Third Modified Level Crossing Algorithm(TMLCA)is proposed.Firstly,the singular value decomposition algorithm is used to preprocess the measured channel values to reduce the influence of noise on key performance.Secondly,K-Means++algorithm is used to quantize and classify the preprocessed channel measurements to generate label sequences.Finally,the TMLCA algorithm is used to reduce bit error rate(BER)and prevent key leakage,and the key consistency and randomness are improved by cyclic interleaving quantization without affecting BER.Simulation results show that the TMLCA algorithm effectively reduces the risk of key disclosure,which is common in existing information negotiation algorithms.Moreover,in view of the mutual constraints between key generation rate and key consistency in existing physical layer key generation schemes,the overall scheme can achieve zero BER while increasing the key generation rate by 34.8%～79.1%.In terms of key consistency,generation rate and security,the physical layer key generation scheme based on TMLCA algorithm has better performance than the existing key generation schemes.关键词
物理层安全/物理层密钥/密钥生成/密钥性能/信息协商Key words
physical layer security/physical layer key/key generation/key performance/information negotiation分类
信息技术与安全科学引用本文复制引用
郑添元,仇英辉..基于第三种改进水平交叉算法的物理层密钥生成方案[J].电讯技术,2025,65(9):1511-1519,9.
