对称加密系统差分功率谱分析攻击

Differential Power Spectral Density Analysis Attacks for Symmetric Encrypted Systems

介绍一种新的旁路攻击方式——差分功率谱分析攻击,阐明集成电路中CMOS逻辑门在工作时的数据功耗相关性,对比说明了差分功率谱分析与差分功耗分析过程,差分功率谱分析将采集的时域信号求其频域中的功率谱密度后再进行差分分析。对插入随机延时的DES嵌入式加密系统进行攻击实验,获得了DES算法的第1轮加密的48位密钥,证明差分功率谱分析可以有效解决时域攻击中的时间点不对齐问题。

Differential Power Spectral Density Analysis（DPSDA） is a new kind of side channel attacks（SCA） approach. This paper explains data-power correlation of CMOS logic gates in the Integrated Circuits（ICs）, introduces Differential Power Analysis（DPA） and Differential Power Spectral Density Analysis（DPSDA）. Instead of computing the differential signals in the time domain, DPSDA is performed in the frequency domain by calculating the differential power spectral density signal. For the embedded DES encrypted systems with random delay, DPSDA can find 48-bit key of the round 1 of DES, but DPA can not.