基于扩展Feistel结构S盒的构造分析  

Analysis of S-Boxes with Expanded Feistel Structure

作　　者：龚涛[1] 陈少真[1] 

机构地区：[1]信息工程大学

出　　处：《信息工程大学学报》2017年第3期328-332,共5页Journal of Information Engineering University

摘　　要：利用3轮平衡的Feistel结构和3轮平衡的MISTY结构构造8×8的S盒,结构内部的3个轮函数选择G.Leander仿射等价的16类最佳4×4的S盒代表元,然后对所有生成的8比特S盒,通过差分均匀度、线性度、雪崩性、代数次数及项数这些指标进行刻画。分析结果表明,利用Feistel结构比MISTY结构构造的S盒在差分均匀度这个指标上更好,而其它指标上没有显著差别。This work is to compare large S-Boxes constructed by three round balanced Feistel and MISTY structures. Then we use the representative elements of the 16 different optimal S-Boxes clas- sified by G. Leander which are based on affine equivalence as the three inner functions in the three round balanced Feistel and MISTY structures. Furthermore, we evaluate the two different results by several cryptographic properties （differential uniformity, linearity, avalanche, algebraic degree and terms）. Finally we conclude that S-Boxes using three round of a balanced Feistel structure are better than those using three round of a balanced MISTY structure in differential uniformity, while the other cryptographic properties make no difference.

关 键 词：S盒 FEISTEL结构 MISTY结构 密码学性质 

分 类 号：TN918.1[电子电信—通信与信息系统]