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A novel hyperchaotic image encryption algorithm with simultaneous shuffling and diffusion
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DOI：10.1007/s11042-022-12239-x.png)
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The performance of an image encryption algorithm based on chaos is largely determined by the nonlinear characteristics of the underlying chaotic system. This paper proposes a mixed one- and two-dimensional chaotic map (MOTDCM) that has a wider hyperchaotic interval, a larger maximum Lyapunov exponent, and more complex nonlinear dynamics than most existing chaotic systems. Using the hyperchaotic sequences generated by the MOTDCM, a novel image encryption algorithm with different structures is proposed, in which shuffling and diffusion are carried out simultaneously from the perspective of the whole input image. Simulation results and a comparative analysis show that the proposed encryption algorithm has a large key space, high sensitivity to the secret key, and good statistical ciphertext properties. It has a better diffusion effect than existing algorithms and meets the imposed security requirements within only one round of operation, with a reduction in algorithm complexity and an improvement in encryption efficiency. Experimental results demonstrate that this encryption algorithm has good performance and can resist chosen-plaintext attacks and known-plaintext attacks effectively.
Keyword:
Hyperchaotic map
Image encryption
Simultaneous shuffling and diffusion
期刊
IF:
3
论文数:
1.9W
被引数:
3.2W
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