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.
出处
《计算机科学》
CSCD
北大核心
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
关键词
SPA攻击
熵率
防御性能量化
信息安全
SPA attack, Entropy rate, Quantify of the defence capability, Information security
