正形置换的级联构造方法

New Method for Cascade Construction of Orthomorphic Permutations

正形置换具有良好密码特性,在密码体制设计中应用广泛。提出了正形置换环结构的概念,研究了正形置换环结构的性质,得到了一种在适当条件下,由两个没有相同置换点的n元正形置换来构造一个n+1元正形置换的方法。该方法为正形置换的构造提供了一种新思路。

Orthomorphic permutation has been tographic properties. This paper presents the c explores the properties of the ring structure. A phic permutation with two n-bit orthomorphic appropriate conditions. This method is a new widely used in cryptogr oncept of orthomorphic aphy because of permutation method is derived to construct （n ring ＋1） its good cryp- structure and -bit orthomor- permutations without same permutation attempt in the construction of orthomorp points hic pe under rmutations.