Cryptographic strength evaluation of AES s-box variants. (21st April 2021)

• Record Type: Journal Article
• Authors: Waqas, Umer; Afzal, Shazia; Mir, Mubeen Akhtar; Yousaf, Muhammad
• Is Part Of: International journal of information and computer security. Volume 14:Number 3/4(2021)
• Page Start: 263
• Page End: 280
• Publication Date: 2021-04-21
• Subjects: absolute error -- AES s-box -- bit independence criteria -- BIC -- CAM variants -- CIP variants -- CIPA variants -- differential probability -- DP -- information security -- LP -- nonlinearity -- s-box variants -- strict avalanche criteria -- SAC; Computer security -- Periodicals; Information systems management -- Security measures -- Periodicals; Computer networks -- Security measures -- Periodicals; Information technology -- Security measures -- Periodicals; 005.805
• Languages: English
• ISSNs: 1744-1765

Abstract

In recent years, researchers have constructed AES s-box variants by customising the values of the parameters in the equation of AES s-box. Strength of these s-box variants is evaluated against the cryptographic properties like avalanche effect, nonlinearity and bit independence criteria, however, there are other important cryptographic properties of s-box, which need to be evaluated before adopting the s-box. In this paper, all types of AES s-box variants are reproduced and evaluated against ten cryptographic properties. The results of five properties, differential and linear probability, nonlinearity, balance and algebraic degree remains the same for any s-box variant due to isomorphic equivalence nature of the variants; whereas, strict avalanche effect, bit independence criteria, correlation immunity, cyclic and fix-point properties showed different results for different s-box variant. Finally, the results are compared with the standard AES s-box and conclusion of overall security of s-box variants with respect to selected properties is conferred.