Lightweight Cryptographic S-Boxes Based on Efficient Hardware Structures for Block Ciphers

Bahram Rashidi

Articles in Press, Accepted Manuscript, Available Online from 20 June 2022

http://dx.doi.org/10.22042/isecure.2022.275268.646

Abstract
  In this paper, we present four low-cost substitution boxes (S-boxes) including two 4-bit S-boxes called S1 and S2 and two 8-bit S-boxes called SB1 and SB2, which are suitable for the development of lightweight block ciphers. The 8-bit SB1 S-box is constructed based on four 4-bit S-boxes, multiplication ...  Read More

Impossible Differential Cryptanalysis of Reduced-Round Midori64 Block Cipher (Extended Version)

A. Rezaei Shahmirzdi; A. Azimi; M. Salmasizadeh; J. Mohajeri; M. R. Aref

Volume 10, Issue 1 , January 2018, , Pages 3-13

http://dx.doi.org/10.22042/isecure.2018.110672.399

Abstract
  Impossible differential attack is a well-known mean to examine robustness of block ciphers. Using impossible differential cryptanalysis, we analyze security of a family of lightweight block ciphers, named Midori, that are designed considering low energy consumption. Midori state size can be ...  Read More