Netinfo Security ›› 2025, Vol. 25 ›› Issue (5): 722-731.doi: 10.3969/j.issn.1671-1122.2025.05.005

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Research on Orthomorphic Permutations Based on Cryptographic Structure

YANG Yijia, LI Kangquan(), SUN Bing   

  1. College of Science, National University of Defense Technology, Changsha 410073, China
  • Received:2024-04-02 Online:2025-05-10 Published:2025-06-10

Abstract:

Orthomorphic permutations have wide applications in cryptography and coding theory. This paper studied the constructions of orthomorphic permutation using cryptographic structures. Firstly, a two-round-function was constructed based generalized Feistel structure over the extension field with even characteristic and based on this structure, the conditions were given for the transformation being orthomorphic using the rank of matrix. After then, two specific examples of orthomorphic permutations were given. The first one was based on the left shift transform, while the other was based on Feistel and L-MISTY structures. In summary, this paper aims to construct orthomorphic permutations that follow specific cryptographic structures, which will enrich the types of orthomorphic permutations.

Key words: orthomorphic permutation, generalized Feistel structure, Feistel structure, MISTY structure, cryptographic structure

CLC Number: