Pixel-level and bit-level image encryption method based on Logistic-Chebyshev dynamic coupled map lattices

Xingyuan Wang and Xiaohui Du

Chaos, Solitons & Fractals, 2022, vol. 155, issue C

Abstract: This paper proposes two new chaotic systems. One is one-dimensional Logistic-Chebyshev map (1DLCM) and the other is Logistic-Chebyshev dynamic coupled map lattices (LCDCML). LCDCML uses 1DLCM as the dynamic coupling coefficient, which meet the cryptographic characteristics and are suitable for studying image encryption. Based on these two systems, a pixel-level and bit-level image encryption algorithm is proposed. The specific encryption algorithm first generates the chaotic sequence by the LCDCML system. The scrambling part adopts pixel-level and bit-level scrambling combined with chaotic sequences. The pixel-level scrambling uses dynamic row and column index scrambling. The bit-level scrambling uses dynamic circular traversal and dynamic cyclic shifts. Then, the image is diffused by a special formula combined with chaotic sequences. Finally, this encryption scheme can also be extended to color images. Experimental simulation and performance analysis show that the encryption algorithm has higher security.

Keywords: 1DLCM; LCDCML; index scrambling; bit-level scrambling; dynamic circular traversal (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (7)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:chsofr:v:155:y:2022:i:c:s0960077921009838

DOI: 10.1016/j.chaos.2021.111629

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