PFM:一种抗高阶功耗攻击的SMS4算法  

PFM:a SMS4 algorithm against high-order power analysis attacks

作　　者：李浪[1,2] 李仁发[1] 李静[1] 吴克寿[3] 

机构地区：[1]湖南大学计算机与通信学院,湖南长沙410082 [2]衡阳师范学院计算机系,湖南衡阳421008 [3]厦门理工学院计算机系,福建厦门361024

出　　处：《通信学报》2010年第5期87-92,共6页Journal on Communications

基　　金：国家自然科学基金资助项目(60903203);湖南省科技计划资助项目(2009GK3023);湖南省自然科学基金资助项目(07JJ6108)~~

摘　　要：针对已有的SMS4功耗攻击方法,设计了一种适合低功耗小面积的固定值掩码SMS4算法。首先,对SMS4算法结构及内部加密运算流程进行研究;设计了一种SMS4原子掩码算法来抗高阶功耗攻击,该方法使各中间变量均被掩码;在此方法的基础上,为了减少芯片的面积和功耗以适应特殊环境下的加密应用(如特殊环境的传感器加密通信节点),提出了一种改进的固定值掩码算法:伪随机固定值掩码算法(PFM)及其实现技术。实验结果证明,该方法在芯片面积和功耗增加不大的情况下,可以有效抵抗二阶差分功耗攻击。A fixed-value mask algorithm for SMS4 was proposed in order to resist power analysis attack based SMS4.Firstly,an atomic mask algorithm of SMS4 was designed to resist against high-order power analysis attack based on the study of the structure of SMS4 algorithm,the intermediate variables were masked in the method.Secondly,pseudo-random fixed-value mask method（PFM） was proposed based on the above method,when its hardware implementation aiming at low power and less areas was considered about.Moreover,PFM has the ability to resist against high-order power analysis attacks when applied to the sensor node of special environment of communication.Finally,the experimental results show that the proposed algorithm has the ability to effectively resist second high-order differential power analysis attack without increasing much power and hardware resources.

关 键 词：SMS4 高阶功耗攻击 原子掩码 伪随机固定值掩码算法 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]