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

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 c...

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Vydané v:Applied sciences Ročník 12; číslo 19; s. 9952
Hlavní autori: Dridi, Fethi, El Assad, Safwan, El Hadj Youssef, Wajih, Machhout, Mohsen, Lozi, René
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: Multidisciplinary digital publishing institute (MDPI) 01.10.2022
MDPI AG
Predmet:
chaos-based encryption/decryption system
Computer Science
Cryptography and Security
modified 2-D cat map
PRNG-CS
S-box
security analysis
security analysis
performance
S-box
Information security
Cryptography
modified 2-D cat map
PRNG-CS
chaos-based encryption/decryption system
ISSN:2076-3417, 2076-3417
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Popis
Shrnutí: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.
ISSN:2076-3417
2076-3417
DOI:10.3390/app12199952