基于SM3的动态令牌的能量分析攻击方法

摘要

提出一种针对基于SM3的动态令牌实施的能量分析攻击新方法,首次提出选择置换函数的输出作为能量分析攻击的目标,并将攻击结果联立得到方程组.根据给出的逆置换函数求解方程组,即可破解最终的密钥.通过实测攻击实验,验证了该攻击方法的有效性,这就很好地解决了直接选择密钥作为能量分析攻击目标所产生的问题,同时,引入中间变量作为能量分析攻击目标破解密钥方法,还可以应用于针对其他密码算法的能量分析攻击中.%A novel method of the power analysis attack of dynamic password token based on SM3 was first proposed to choose the permutation function output as the power analysis attack target,and the simultaneous equations about the key were composed of the attack results.According to the given inverse permutation function,the key was derived by solving the simultaneous equations based on the inverse permutation function.Measured results are presented to validate the proposed method was effective.The proposed method solved the problems of permutation function keys for direct selection of target as an energy analysis attack target.And the proposed method can also be applied to the power analysis attack of the other cryptographic algorithms.