信息工程大学学报2024，Vol.25Issue(1)：17-23,7.DOI:10.3969/j.issn.1671-0673.2024.01.003
基于MAP准则的无线信道密钥量化算法
Wireless Channel Key Quantization Algorithm Based on MAP
摘要
Abstract
In the field of physical layer security,key generation technology based on wireless channel includes four steps:channel detection,quantization,key reconciliation and security enhancement.Considering the traditional quantization schemes only focus on the design of quantization terminal value and the high initial key disagreement rate(KDR),a quantization algorithm based on maximum a posteriori decision criterion(MAP)is proposed by constructing a mathematical model to calculate the probability of the partner's quantization results,and obtaining its quantized symbol information and bit soft-information.The simulation results show that the proposed algorithm can achieve lower KDR.The KDR of the proposed algorithm is 43%and 35%lower than that of equal probability quantization and channel quantization alternating(CQA)algorithm respectively when SNR is 10 dB.Meanwhile,adopting 2-bits quantization,the length of the generated key of the algorithm is two times longer than that of CQA.关键词
密钥生成技术/密钥不一致率/量化门限/最大后验判决准则/密钥长度Key words
secret key generation/KDR/quantization threshold/MAP/key length分类
信息技术与安全科学引用本文复制引用
田克明,辛刚,郭东琴,张剑..基于MAP准则的无线信道密钥量化算法[J].信息工程大学学报,2024,25(1):17-23,7.基金项目
国家自然科学基金资助项目(62271505) （62271505）
国家重大研发计划资助项目(2022YFB28022804) （2022YFB28022804）
