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An image encryption algorithm based on pixel bit operation and nonlinear chaotic system
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DOI：10.1007/s00371-022-02517-y.png)
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This paper proposes a new one-dimensional chaotic map-nonlinear coupled Sine-Tent-Logistic chaotic map (1DNCSTL). A series of tests on this map show that the map has the characteristics of randomness and sensitivity to initial values and is suitable for image encryption. Based on this map, the article further proposes pixel bit position scrambling and reorganization operation and dynamic nonunique diffusion operation. Pixel bit position scrambling and reorganization operation is different from the traditional scrambling operation that only changes the position of the pixel value; this operation can achieve the effect of changing the pixel position and pixel value at the same time. The dynamic nonunique diffusion operation is different from the traditional unique-formula diffusion operation. The diffusion formula is not unique, which can ensure the security of the algorithm. Simulation experiment results and various security performance analysis show that the algorithm proposed in this paper has good performance. Compared with other encryption schemes, this algorithm is more suitable for image encryption.
Keyword:
Chaos theory
Scrambling and diffusion operations
Chaos image encryption
Non-unique diffusion
期刊
IF:
2.9
论文数:
4.6K
被引数:
6.5K
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