基于PID控制的自适应密钥生成  

Adaptive key generation based on PID control

作　　者：陈发堂[1] 郑金贵 陈峰 郑明杰 CHEN Fatang;ZHENG Jingui;CHEN Feng;ZHENG Mingjie(College of Telecommunications and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065

出　　处：《南京邮电大学学报（自然科学版）》2023年第3期11-18,共8页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

基　　金：重庆市自然科学基金(cstc2021jcyj⁃msxmX0454)资助项目。

摘　　要：在无线安全通信中,生成密钥并保证其稳定是至关重要的。目前绝大多数密钥生成方案都是以恒定的速率探测信道,没有考虑实际环境中由于信道状态的改变而导致信道探测效率和KGR(Key Generation Rate)不稳定的问题。为了使合法通信端的信道探测效率和KGR保持稳定,提出一种基于PID(Proportional Integral Derivative)控制的自适应密钥生成方案。该方案将实际信道探测效率与目标信道探测效率作比较,自适应引入AR(Artificial Randomness),从而保持信道探测效率的稳定;根据反馈的KGR与目标KGR比较,自适应调整信道探测速率,从而保持KGR稳定。仿真结果表明,不论信道环境变化得快与慢,自适应控制器都能将信道探测效率和KGR稳定在相应的目标值附近。In wireless secure communication,it is crucial to generating keys and keeping them stable.Most current key generation schemes probe the channel at a constant rate,without considering the instability of the probing efficiency and the key generation rate(KGR)caused by the change of the channel state in practice.In this regard,an adaptive key generation scheme based on the proportional integral derivative(PID)control is proposed.The scheme compares the actual channel probe efficiency with the target channel probe efficiency,and adaptively introduces artificial randomness(AR)to maintain the stability of the channel probe efficiency.By comparing the feedback KGR and the target KGR,the scheme adaptively adjusts the channel probing rate to keep KGR stable.Simulation results show that despite the fluctuation of the channel environment,the adaptive controller can stabilize the channel probe efficiency and KGR around their target values.

关 键 词：密钥生成 PID控制 信道探测 

分 类 号：TN918.4[电子电信—通信与信息系统]