A multi-image encryption scheme based on a new n-dimensional chaotic model and eight-base DNA

Mingjie Zhao, Lixiang Li and Zheng Yuan

Chaos, Solitons & Fractals, 2024, vol. 186, issue C

Abstract: At present, multi-image encryption schemes usually require the type, quantity and size of images to be fixed, and there are many restrictions. Therefore, this paper proposes a multi-image encryption scheme based on a new n-dimensional(nD) chaotic model and eight-base DNA, which can encrypt any type, quantity and size of images. Firstly, an nD chaotic model is designed, which can generate different chaotic systems according to individual requirements, simplify the complexity of chaotic system design, and solve the problems of uneven chaotic trajectory and limited range. Secondly, some new eight-base algebraic operations are proposed, which opens up a new calculation method for DNA calculation and information processing. These algebraic operations are applied to the bidirectional diffusion process to achieve bidirectional DNA diffusion. Finally, multiple images are fused, and different keys are generated by the SHA-512 algorithm to ensure that each fused image has a unique key. Moreover, SCAN is utilized to scramble the fused image, which provides more flexibility and selectivity for image encryption and processing. Experimental simulation and security analysis verify that the proposed scheme has a superior effect and good anti-attack when encrypting multiple images with different types, quantities and sizes.

Keywords: Multi-image encryption; nD chaotic model; nD chaotic system; DNA (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:chsofr:v:186:y:2024:i:c:s0960077924008841

DOI: 10.1016/j.chaos.2024.115332

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