基于双样本KS检验的非特定TVLA方法  

Non-specific TVLA method based on two-sample KS test

作　　者：郑震 严迎建[1] 蔡爵嵩 刘燕江 ZHENG Zhen;YAN Yingjian;CAI Juesong;LIU Yanjiang(Department of Cryptogram Engineering,Information Engineering University,Zhengzhou 450001,China)

机构地区：[1]信息工程大学密码工程学院,河南郑州450001

出　　处：《通信学报》2023年第5期137-147,共11页Journal on Communications

摘　　要：测试向量泄露评估(TVLA)在能耗样本量较少时易出现“假阴性”错误。针对该问题进行了理论推导,发现对非特定TVLA,能量迹中存在泄露的采样点处得到的检验统计量t值随能耗样本量变化而变化,非泄露点处的t值则无显著变化,因此当存在泄露时不同能耗样本量下得到的t值序列的分布不同。据此提出在不同样本量下实施非特定TVLA并对得到的t值序列实施双样本KS检验以评估泄露。分别在无防护对齐仿真能耗数据、加防护对齐能耗数据集DPAContestv4_2和加防护非对齐自测能耗数据上进行了验证,结果表明在对齐的仿真能耗数据和DPAContestv4_2数据集上所提方法检测出泄露所需样本量较其他方法均有所减小,最多分别减小了46.1%和39.0%;在非对齐的自测能耗数据进行对齐处理后,所提方法所需能耗样本量较其他方法同样有所减小,最多减小了29.4%。因此所提方法能够有效减小能耗样本量较小时出现“假阴性”错误的概率。Test vector leakage assessment(TVLA)is prone to“false negative”when the power consumption sample size is small.To address this issue,it was found that for non-specific TVLA,when the power consumption sample size changes,the test statistic t-values obtained at the leakage sampling points in the power trace vary accordingly,while the t-values at the non-leakage sampling points do not significantly vary.Therefore,when there is leakage,the distributions of the t-values obtained under different sample sizes will be different.Based on this,it was proposed to implement non-specific TVLA under different sample sizes and perform two-sample KS test on the obtained t-value sequences to evaluate whether there was leakage.Verifications were carried out based on unprotected-aligned simulation power consumption,protected-aligned power consumption dataset DPA Contest v4_2 and protected-non-aligned self-collected power consumption respectively.The results showed that the sample size required by the proposed method on the aligned simulation power consumption and DPA Contest v4_2 was reduced by at most 46.1%and 39.0%respectively.And after the alignment,the required sample size of the proposed method on the self-collected power consumption is also smaller than that of other schemes,with a maximum reduction of 29.4%.Therefore,the proposed method can effectively reduce the probability of“false negative”when the power consumption sample size is small.

关 键 词：侧信道 测试向量泄露评估 假阴性 双样本KS检验 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]