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An efficient chaotic image encryption scheme using simultaneous permutation-diffusion operation
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DOI：10.1007/s00371-023-02876-0.png)
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Abstract
En 中文
This paper suggests a chaotic image encryption scheme using an efficient pseudo-random number generator (PRNG). The proposed PRNG can produce 1024 pseudo-random numbers by reusing 64 items of the time series of the chaotic system. Compared with the direct quantization method, the efficiency of our PRNG is improved by about 79% due to a 16-fold reduction in the total number of iterations of the chaotic system. By using the proposed PRNG, we present an efficient chaotic image encryption scheme. Unlike most other existing approaches that use independent permutation and diffusion operations, we combine these two operations into a single stage. In our scheme, row-wise and column-wise permutation operations are performed by utilizing two different Latin squares, and the diffusion operation is performed simultaneously. As the two steps of permutation and diffusion interact with each other, our suggested scheme can achieve the satisfactory security level with only one round of encryption. Compared with the AES algorithm, the encryption efficiency of our scheme is improved by more than 60% on both grayscale and color images. Moreover, we also demonstrate the encryption efficiency of our scheme by comparing it with several state-of-the-art algorithms. The detailed security analysis shows that our suggested scheme is robust against all common attacks.
Keywords:
Chaos
Image encryption
Permutation-diffusion
PRNG
Reuse strategy
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2.9
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4.6K
Citations:
6.5K
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