一种面向SoC的能量迹预处理方法  

An energy trace preprocessing method for SoC

作　　者：蔡晓敏 李仁发 李少青[2] 沈高 邝世杰 CAI Xiao-min;LI Ren-fa;LI Shao-qing;SHEN Gao;KUANG Shi-jie(College of Computer Science and Electronic Engineering,Hunan University,Changsha 410082;Shool of Computer,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]湖南大学信息科学与工程学院,湖南长沙410082 [2]国防科技大学计算机学院,湖南长沙410073

出　　处：《计算机工程与科学》2020年第9期1538-1543,共6页Computer Engineering & Science

摘　　要：差分功耗攻击技术是恢复密码设备密钥最有效的攻击手段之一,但在攻击过程中,如果使用不合适的采样点,将引入额外噪声,会降低攻击成功率。为此,提出了一种基于能量模型的能量迹分类方法,旨在定位能量迹中与密钥具有较强相关性的特征点。分别利用汉明距离和汉明重量2种能量模型定位特征点,截取特征点附近少量采样点构成特征区间。攻击不同密钥下载有128位AES算法的SoC芯片,实测结果表明:利用汉明距离能量模型得到的最佳特征区间的长度较短。最终,基于汉明距离能量模型得到的特征点定位方法具有较低的样本计算量,且缩减了大量的样本量。Differential power attack is one of the most effective methods to reveal the key of cryptographic devices.Therefore,an energy trace classification method based on energy model is proposed to locate the significant points that have strong correlation with the key.Two energy models(hamming distance and hamming weight)are used,and a few sampling points near the significant point are intercepted to form the significant interval.The SoC chip with 128-bit AES algorithm under different keys is attacked.The actual test results show that the length of the optimal characteristic interval obtained by hamming distance energy model is short.Finally,the characteristic point location method based on hamming distance energy model has low sample calculation and reduces a large amount of samples.

关 键 词：差分功耗攻击 片上系统SOC 能量模型 特征点 特征区间 能量迹 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]