Journal of Xidian University ›› 2021, Vol. 48 ›› Issue (1): 69-75.doi: 10.19665/j.issn1001-2400.2021.01.008

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8 bits lightweight S-box with the Feistel structure

DONG Xinfeng1,2(),ZHANG Wenzheng2(),XU Chunxiang1()   

  1. 1. School of Computer Science and Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China
    2. Science and Technology on Communication Security Laboratory,Chengdu 610041,China
  • Received:2020-08-06 Online:2021-02-20 Published:2021-02-03


As a confusion component of the lightweight symmetric cryptographic algorithm,a lightweight S-box is the key to designing the lightweight symmetric cryptographic algorithm.In this paper,a new method for designing 8-bits lightweight S-boxes is proposed.The round logic operation in the S-boxes involves only 4 logic AND operations (single bits) and 4 logic XOR operations (single bits).After iterating 4 rounds,the differential uniformity of the 8-bits lightweight S-boxes is 16 and the nonlinearity is 96.Compared with the existing known methods,the 8-bits lightweight S-box designed by our method needs less hardware resources while gaining the best known cryptographic properties,such as the low differential uniformity and the high nonlinearity.

Key words: Feistel structure, S-box, lightweight, symmetric cryptography, differential uniformity, Nonlinearity

CLC Number: 

  • TN918