针对密码芯片频域互信息能量分析攻击

Mutual information power analysis attack in the frequency domain of the crypto chip

在对密码芯片进行时域上互信息能量分析基础上,提出频域上最大互信息系数能量分析攻击的方法。该方法结合了密码芯片在频域上信息泄露的原理和互信息能量分析攻击的原理,引入了最大互信息系数的概念,避免了在时域上进行曲线精确对齐的操作,并针对国产密码算法SMS4进行了攻击测试。实验表明,频域上最大互信息系数攻击的有效性扩展了侧信道能量分析攻击的方法。

Based on the mutual information power analysis attack in time domain of the crypto chip, a method for analyzing the energy of the maximum mutual information coefficient in the frequency domain was proposed. This method combined the principle of password chip information leakage in frequency domain and the principle of mutual information power analysis. The concept of maximum mutual information coefficient was introduced, which avoided the operation of accurate alignment in time domain. Experiments on the algorithm of SMS4 show that the effectiveness of the maximum mutual information coefficient attack in the frequency domain is extended to the method of the side channel energy analysis.