一种基于车载电源电压的随机数提取方法  

Method for Extracting True Random Number Based on Vehicle Power Supply Voltage

作　　者：韩牟[1] 袁晓峰[1] 马世典[2] 殷志昆 HAN Mu;YUAN Xiaofeng;MA Shidian;YIN Zhikun(School of Computer Science and Communication Engineering,Jiangsu University,Zhenjiang 212013;Automotive Engineering Research Institute of Jiangsu University,Zhenjiang 212013)

机构地区：[1]江苏大学计算机科学与通信工程学院,镇江212013 [2]江苏大学汽车工程研究所,镇江212013

出　　处：《计算机与数字工程》2022年第5期1041-1046,1108,共7页Computer & Digital Engineering

基　　金：国家自然科学基金项目(编号:61300229);江苏省重点研发项目(编号:BE2017035)资助。

摘　　要：针对现有信息安全防护方法难以有效解决智能网联汽车信息安全的问题,构造真随机密钥是很好的解决思路,因此提出一种基于车载电源电压的随机数提取方案。该方案针对外部交通环境对驾驶决策的影响,搭建驾驶模式因果模型,通过马尔科夫分析电源电压变化过程。在此基础上,以多信息熵融合为初始熵源,采用小波变换过滤周期性信号,并行采集提高效率,并利用数字后处理改善序列随机性。测试结果表明,所提取的随机序列具备良好的随机性,符合随机密钥的要求。In view of the existing information security protection methods are difficult to effectively solve the problem of information security of intelligent network connected vehicles,the construction of true random key is a good solution.Therefore,a real random number extraction scheme based on vehicle power supply voltage is proposed.Aiming at the influence of external traffic environment on driving decision-making,this scheme builds a causal model of driving mode,and analyzes the process of power supply voltage change through Markov analysis.On this basis,multi information entropy fusion is used as the initial entropy source,wavelet transform is used to filter periodic signals,parallel acquisition is used to improve efficiency,and digital post-processing is used to improve sequence randomness.Simulation test results show that the extracted random number has good randomness and meets the requirements of random key.

关 键 词：车载电源电压 随机数 马尔科夫 小波变换 数字后处理 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]