基于walsh谱的功耗分析建模及仿真研究  

Modeling and simulation of power analysis based on walsh spectrum

作　　者：刘上力[1] 赵劲强[1] 聂勤务[1] 

机构地区：[1]湖南科技大学网络信息中心,湖南湘潭411201

出　　处：《湖南科技大学学报（自然科学版）》2009年第3期91-95,共5页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：湖南省教育厅资助科研项目(08C335)

摘　　要：功耗分析能有效析出内嵌AES密码芯片的密钥,为了证明AESS盒和功耗分析内在联系,找到防范功耗分析的办法,该文通过分析AES差分功耗分析和相关功耗分析建模原理,结合walsh谱的分析方法,提出基于walsh谱的功耗分析的新方法,证明了分组密码布尔函数非线性度越高,密码防范功耗分析能力就越弱的结论.实验表明,相对差分和相关功耗分析而言,基于Walsh谱的功耗分析有效提高了析出密钥的效率和精度.图3,表1,参8.AES cryptosystems embedded in cryptographic devices are sensitive to a series of cryptanalysis such as power analysis. To prevent power analysis attacks, the relation of AES S-box and power analysis is analyzed. Based the walsh spectrum method, the fundamental principles of differential power analysis and correlation power analysis against AES are described. A new method based on walsh spectrum is proposed to reveal the key embedded in cryptographic. Furthermore, conclusion are drawn and proved that the vulnerability against power analysis caused by the highly nonlinear S-boxes. The results indicate that the new method speeds up the revelation of key and yields higher precision. 3figs., ltab., 8refs.

关 键 词：差分功耗分析 相关功耗分析 高级加密标准 沃尔什谱 非线性度 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]