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Article Dans Une Revue Applied Sciences Année : 2022

Design, Implementation, and Analysis of a Block Cipher Based on a Secure Chaotic Generator

Résumé

This work proposes a new secure chaos-based encryption/decryption system, operating in cipher block chaining (CBC) mode, and analyze its performance. The cryptosystem includes a robust pseudorandom number generator of chaotic sequences (PRNG-CS). A strong chaos-based S-box is proposed to perform a circular substitution operation (confusion process). This PRNG-CS consists of four discrete 1-D chaotic maps, weakly coupled by a predefined coupling matrix M, to avoid, on the one hand, the divide-and-conquer attack and, on the other hand, to improve the generated sequence’s randomness and lengths. The noun is also used in the construction of the S-box. Moreover, a 2-D modified cat map and a horizontal addition diffusion (HAD) preceded by a vertical addition diffusion (VAD) are introduced to perform the diffusion process. The security analysis and numerous simulation results of the main components (PRNG-CS and S-box) as well as the whole cryptosystem reveal that the proposed chaos-based cryptosystem holds up against various types of statistical and cryptographic attacks.
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hal-03799417 , version 1 (05-10-2022)
hal-03799417 , version 2 (09-10-2022)

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Fethi Dridi, Safwan El Assad, Wajih El Hadj Youssef, Mohsen Machhout, René Lozi. Design, Implementation, and Analysis of a Block Cipher Based on a Secure Chaotic Generator. Applied Sciences, 2022, 12 (19), pp.9252. ⟨10.3390/app12199952⟩. ⟨hal-03799417v2⟩
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