中文摘要：

信号处理与分析是差分功率分析攻击中的关键技术.详细给出信号轨迹对齐、信号去噪、信号压缩、时-频信号转换以及差分轨迹尖峰判别等功率信号处理与分析技术.针对AES单片机实现的攻击实验表明,采用上述信号处理与分析技术的差分功率分析,利用3000个功率轨迹样本,可以成功获取AES密码算法的密钥.

英文摘要：

Signal processing and analysis are key techniques used in differential power analysis. This paper presents some techniques of processing and analyzing power signal in detail. Including alignment of power traces, denoising, compression of power traces, time-frequency transform and identification of a significant differential signal peak. The result of the differential power analysis attack against the AT89C52 microcontroller that executes a software implementation of AES shows that the AES key can be recovered with 3 000 samples under the using of the above techniques.