Journal
INTEGRATION-THE VLSI JOURNAL
Volume 94, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.vlsi.2023.102099
Keywords
Cryptology; Chaos; S-box; FO Rabinovich-Fabrikant system; Encryption algorithms
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This paper proposes a new method, based on a chaotic system, for constructing an initial S-box, as well as a novel key-based permutation technique to construct the final S-box. The results show that the S-boxes obtained using this method are stronger and have demonstrated good performance in secure communication and image encryption applications.
For many block encryption algorithms, confusion properties are only related to the substitution box (S-box). The S-box is a crucial component of cryptography. The security of the whole system is affected by the Sbox. Consequently, alternative S-box designs and construction methods have been explored in various studies. In this paper, based on the chaotic Rabinovich-Fabrikant fractional order (FO) system, a new method for constructing a strong initial S-box is proposed. To comply with the objective, the numerical results of the FO chaotic Rabinovich-Fabrikant system are provided by using the four-step Runge Kutta method/Adams-Bashforth-Moulton method for a= 0.87,b= 1.1, and alpha= 0.99. A novel key-based permutation technique is also presented to enhance the functionality of the initial S-box and construct the final S-box. A comparison is made between the performance of the substitution boxes (S-boxes) proposed and that of some other existing chaotic S-box designs. It is perceived that the S-boxes obtained by our proposed methods are stronger. The results of the analysis of the initial and final S-box yield favorable statistics, which make sure of its importance in the use of secure communications. Furthermore, the proposed final S-box's effectiveness in image encryption applications is evaluated through the majority logic criterion (MLC), resulting in exceptional outcomes.
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