Impossible differential cryptanalysis of MARSlike structures
Impossible differential cryptanalysis of MARSlike structures
复制标题
类 MARS 结构的不可能差分密码分析
DOI：
10.1049/iet-ifs.2014.0183
复制
发表时间：
2015
影响因子：
1.4
通讯作者：
Lai Xuejia
中科院分区：
文献类型：
--
作者：
Xue Weijia;Lai Xuejia
MARS结构是一种广义的Feistel结构。统一不可能差分（UID）方法是发现分组密码结构不可能差分特征的有效方法。在这项研究中，对于一种特定的MARS结构，作者使用UID证明，当子块的数量n为偶数时，总是存在3 n-1轮不可能微分。此外，作者证明了当n是奇数时，MARS结构对于任何轮数都不可能微分，这是一个清楚但有趣的结果。
The MARS-like structure is a generalised Feistel structure. Unified impossible differential (UID) method is an effective method to discover impossible differential characteristics for block cipher structures. In this study, for a specific kind of MARS-like structure, the authors use UID to show that when n, the number of subblocks, is even, there always exist 3n − 1 rounds impossible differentials. Moreover, the authors prove that when n is odd, the MARS-like structure has impossible differentials for any number of rounds, which is a clear but interesting result.