基于接收信号的多用户密钥生成方案  

Multiuser secret key generation based on received signal

作　　者：蔡奥林 金梁[1] 钟州[1] 楼洋明[1] CAI Aolin;JIN Liang;ZHONG Zhou;LOU Yangming(National Digital Switching System Engineering & Technological R&D Center, Zhangzhou 450002, China)

机构地区：[1]国家数字交换系统工程技术研究中心,河南郑州450002

出　　处：《网络与信息安全学报》2018年第10期52-58,共7页Chinese Journal of Network and Information Security

基　　金：国家自然科学基金资助项目(No.61601514)~~

摘　　要：基于信道特征生成密钥的方案为通信安全带来了新思路。但在多用户慢衰落条件下,基于信道特征的密钥生成方案由于参数变化慢,导致密钥更新慢。针对此问题,提出了基于接收信号的多用户密钥生成方案,即通过块对角化预编码实现多个随机信号流的分发,使基站与用户能够从用户接收信号中提取密钥。仿真结果表明,提出的基于接收信号的多用户密钥生成方案能够有效提高多用户在准静态及慢衰落条件下的密钥速率。The secret key generation method based on channel characteristic provides a new way for communication security.But under the conditions of multiuser and slow fading,because of the slow channel parameter changing rate,using the secret key generation method above can result in a low secret key rate.To solve this problem,a multiuser secret key generation method based on the received signal was proposed.By distributing the random signals to different users using block diagonalization precoding,base station and user can extract the secret key from the received signal.The novel method could significantly increase the secret key rate of multiuser under the quasi-static channel and slow-fading channel,which is verified by simulations.

关 键 词：密钥生成 MISO 多用户 接收信号 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]