基于熵率的密码芯片抵御SPA功耗攻击能力的量化方法  

Quantitative Methods Based on Entropy Rate to Measure Capability for Cipher Chip to Defense Power Attacks

作　　者：邵奇峰[1] 唐小伟 方明[1] 杨天池[1] 

机构地区：[1]解放军信息工程大学郑州450004 [2]解放军75576部队海口570236

出　　处：《计算机科学》2013年第6期116-118,共3页Computer Science

基　　金：国家自然科学基金(61072047)资助

摘　　要：通过大量的工程实验获得了描述密码芯片功耗泄漏量随机性的两个关键指标:一是门级翻转数量的分布律,二是门级翻转数量的转移矩阵。以这两个关键指标为基础,引入信息论中熵率的概念,通过熵率的值动态地测量密码芯片在加密过程中功耗波形的熵值随机器周期数量的增长速度,进而有效地衡量密码芯片在SPA攻击下所具备的防御性能。Two key indicators to descript randomness of cipher chip power leakage were obtained through a large number of engineering experiments： one is the distribution law of gate-level flip number, another one is the transition matrix of the number of gate-level flip. Based on the two key indicators,we introduced the concept of entropy rate in informa- tion theory. Through the entropy rate, we can dynamicly measure the speed of the entropy increasing about the power consumption waveform in the encryption process, and effectively measure the defensive performance of the cipher chip under SPA attack.

关 键 词：SPA攻击 熵率 防御性能量化 信息安全 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术]