Abstract
Protecting digital images is crucial, and image encryption schemes based on chaotic systems have been extensively studied where image permutation is a critical process. The updating processes of particle swarm optimization algorithm have the ability to change the rules of particles motion, and it can be employed to permutate image. In this work, an image encryption scheme based on the updating processes of particle swarm optimization algorithm and hyperchaotic system is proposed. Specifically, a key generation mechanism combined with secure hash algorithm 256 hash is first introduced to generate the initial values of hyperchaotic complex Lü system. Then, the plain image is confused by the position and velocity updating processes of particle swarm optimization algorithm. In addition, an adaptive diffusion mechanism is designed and applied to the confused image to obtain the final cipher image. Simulation results and security analysis show that the proposed scheme exhibits good performance of sophisticated dynamic behavior, high sensitivity to key, and effectively resisting the typical cryptanalysis attacks, and provides an alternative to real-time image encryption application.
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Funding
This research was supported by the National Natural Science Foundation of China under Grants 61801131, the funding of Overseas 100 Talents Program of Guangxi Higher Education, 2018 Guangxi One Thousand Young and Middle-Aged College and University Backbone Teachers Cultivation Program.
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YL contributed to conceptualization, methodology, writing—review & editing. XO contributed to methodology, validation, writing—original draft, writing—review & editing. JL contributed to methodology, writing—review & editing. LC contributed to validation, writing—review & editing. YZ contributed to validation, writing—review & editing.
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Luo, Y., Ouyang, X., Liu, J. et al. An image encryption scheme based on particle swarm optimization algorithm and hyperchaotic system. Soft Comput 26, 5409–5435 (2022). https://doi.org/10.1007/s00500-021-06554-y
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DOI: https://doi.org/10.1007/s00500-021-06554-y