针对DES密码芯片的CPA攻击仿真

为研究密码芯片抗功耗分析性能,构造了一个功耗分析研究平台,结合DES算法在平台上进行了相关性功耗分析(CPA)攻击仿真实验。根据猜测部分密钥时的模拟功耗与猜测整个密钥时模拟功耗之间的相关系数大小来确定猜测密钥的正确性,由此可以确定整个密钥。这种功耗分析仿真方法,能够揭示未经防御的DES算法面临CPA攻击时的脆弱性。

Simulation of correlation power analysis against DES cryptographic chip

To study the ability of cryptographic chip′ s resistance to power analysis, this paper constructs a platform for power analysis. Combined DES algorithm, we do the correlation power analysis attack experiment based on this platform. With comparing the correlation coefficient between the power consumption of guessed partial key and the whole key, the correctness of the guessed partial key is confirmed by this method, the rest part of key can be achieved by this method. This method reveals the vulnerability of DES implementation without any countermeasure to CPA attacks.