一种AES算法的快速模板攻击方法*

传统的模板攻击方法在模板构建阶段，通常需要进行大量的计算，在计算协方差矩阵的时候甚至会遇到一些无法得出结果的情况。本文通过对模板攻击技术的深入研究，简化了模板的结构，改进了模板构建的方法，提出了一种新型模板攻击策略，成功解决了这些问题。同时，我们还独立完成了侧信道数据采集平台的开发，并编写了PC端的侧信道攻击软件。针对在mage16单片机开发板上实现的AES加密算法，我们进行了基于模板的差分功耗分析攻击（Differential power analysis, DPA），实验结果表明，该方法能有效地避免传统的模板攻击可能发生的数值计算问题，相比于普通的DPA攻击，本文方法所需要的能量迹数量大幅减少，有力地证明了该方法的有效性和实用性。

A fast template DPA attack against AES

In the template building stage of the traditional template attack method, a large number of calculations are usually needed to calculate the covariance matrix, sometimes the result is even impossible to get. In this paper, through the in-depth study of the template attack technology, we propose a new type of attack strategy. With the improvement of the template building, our method greatly simplifies the template structure, and successfully solves these problems above. At the same time, we also independently completed the development of the side channel data acquisition platform, and wrote the side channel attack software used on PC. For AES encryption algorithm in mage16 microcontroller development board, we performed a DPA attack based on template. The experimental results show that, this method can effectively avoid the numerical calculation problems that the traditional template attack may occur in the process, and compared to the ordinary DPA attacks, it dramatically reduces the number of the energy traces needed, which effectively proved the validity and practicability of our method.