东南大学学报（自然科学版）2017，Vol.47Issue(2)：203-208,6.DOI:10.3969/j.issn.1001-0505.2017.02.001
基于K-L变换的无线信道密钥提取方法
Secret key extraction algorithm for wireless channel based on K-L transform
摘要
Abstract
To solve the problem of non-reciprocity and high redundancy of channel characteristic measurements in secret key generation algorithm based on wireless channel characteristics,a secret key extraction approach based on K-L transform is proposed.First,the K-L transform is divided into three parts including signal partition,transform matrix calculation,and signal transform.The corresponding mathematical model of each step is established.The characteristics of two K-L transforms with and without interaction are clarified,respectively.Then,the information leakage rate caused by covariance or transform matrix interaction is calculated,and the computational complexities of these two transforms are analyzed.The results show that the K-L transform with interaction can enhance key agreement,reduce computational complexity and lead to negligibly small information leakage,making it more applicable for secret key generation from wireless channel.关键词
密钥生成/物理层安全/K-L变换/相关系数/特征向量Key words
secret key generation/physical layer security/K-L transform/correlation coefficient/eigenvector分类
信息技术与安全科学引用本文复制引用
李古月,胡爱群..基于K-L变换的无线信道密钥提取方法[J].东南大学学报（自然科学版）,2017,47(2):203-208,6.基金项目
国家自然科学基金资助项目(61571110)、江苏省“六大人才高峰”资助项目. （61571110）
