基于塔域的通用循环移位掩码设计方法

Design Method of Generic Cyclic Shift Mask Based on Tower Field

该文分析了塔域的运算特性,提出了基于塔域分解的非线性变换实现方法,设计了求逆运算的随机掩码方案,利用循环移位对随机掩码进行移位变换,形成了基于塔域的循环移位随机掩码方案,实现了所有中间值的随机化隐藏,提高了算法的抗能量攻击能力。该文在高级加密标准(AES)算法上进行验证,利用T-test和相关性分析对掩码方案进行安全性评估。该掩码方案无明显信息泄露点,可有效抵抗相关性攻击,另外较现有文献的掩码方案,资源开销更小,通用性更好。

The operation characteristics of the tower field is analyzed, a nonlinear transformation realization method based on the tower domain is proposed. A random mask schedule for the inversion operation is designed, and cyclic shift is used in the randomization of mask, forming cyclic shift random mask scheme based on the tower domain, realizing the randomized hiding of all intermediate values and improving the ability of the algorithm to resist power attacks. The method proposed is verified on the Advanced Encryption Standard(AES) algorithm with the use of T-test and correlation analysis to evaluate the security of the masking scheme.There is no obvious information leakage points in the schedule, proving the ability to effectively resist correlation attacks. In addition, compared with the mask schedule in existing reference, the mask schedule proposed in this paper has less resource overhead and better generality.