DES算法差分电磁攻击及区分函数的选择  

DEMA attack on DES and decision function selection

作　　者：于敬超 杨昌盛[1] 严迎建[1] 李默然[1] 

机构地区：[1]解放军信息工程大学,河南郑州450000

出　　处：《电子技术应用》2014年第3期48-51,共4页Application of Electronic Technique

摘　　要：为了解决DEMA攻击时由于假峰现象而误判密钥的问题,在分析COMS电路电磁泄漏机理的基础上,针对DES算法的DEMA攻击构造了3种不同的区分函数并对其进行对比分析,给出了DES算法合适的区分函数构造方法。实验结果表明,选择该区分函数进行攻击时可以有效地避免假峰现象,提高了攻击的成功率。In order to solve the problem of key by misjudgment caused by ghost peak when DEMA attack,based on the analysis of mechanism of electromagnetic leakage of the COMS circuit,this article constructs three different division functions in view of the DEMA attack of DES algorithm,then contrasts and analyses the function,and provides the appropriate division function for DES algorithm.The experimental results show that the division function can effectively help the attack avoid the phenomenon of ghost peak and improve the success rate.

关 键 词：DES密码芯片 差分电磁分析 区分函数 假峰 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]