相关性电磁分析攻击及最小样本量分析  

Electromagnetic correlation attacks and the minimum number of attack traces analyzing

作　　者：陈开颜[1] 张鹏[1] 邓高明[1] 邹程[1] 

机构地区：[1]军械工程学院计算机工程系,河北石家庄050003

出　　处：《华中科技大学学报（自然科学版）》2011年第1期32-35,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(60940019);军械工程学院原始创新基金资助项目(YSCX0903)

摘　　要：对相关性电磁分析方法中的均值差法与Pearson系数法的中间过程进行了分析.由于中间点的选取与密钥相关的位数不同,因此Pearson系数法的分析效果优于均值差法.以AT89C52上实现的数据加密标准(DES)加密系统为对象进行2种相关性电磁分析攻击实验,结果证明了分析的正确性.利用统计学中假设检验的基本概念与原理推导了2种相关性分析方法所需的最小样本量计算公式,为密码实现提供一项安全性评估参数.The process of mean value difference and Pearson coefficient correlation methods were analyzed to compare their effects in correlation electromagnetic analysis.The correlative bits difference which selected medium value relative to secret key was the main reason.Then experiments were carried out on the DES cipher system implemented on AT89C52.Two different methods were used comparably.It was proved that Pearson coefficient correlation method was better than mean value difference one.The minimum number of traces needed in these two attacks was educed using the principle of hypothesis test,which provides the threshold value for attack and defense.

关 键 词：密码系统 数据加密标准 相关性系数 均值差 电磁旁路密码分析 最小样本量 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]