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A novel image encryption algorithm based on coupled map lattices model
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DOI：10.1007/s11042-023-15964-z.png)
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摘要
En 中文
This paper proposes a novel image encryption method based on coupled map lattice (CML) model. The main idea of this method is to solve the initial conditions of the CML system by combining the hash value of plaintext image with external keys. Then, the CML system is iterated to produce F intermediate chaotic sequences of f(x) map and X the chaotic sequences of CML system, respectively. The plaintext image is scrambled and diffused by using F chaotic sequences and the X chaotic sequences. Using the intermediate chaotic sequences F generated by CML system can effectively reduce the length of CML system and save the iteration time of chaotic sequence. Moreover, in the diffusion stage, forward diffusion and reverse diffusion are used to diffuse the image, which further enhances the security of the encryption algorithm. Experimental results indicate that the correlation coefficient of adjacent pixels in Lena's cipher image are 0.0005, 0.0065 and 0.0009 in the horizontal, vertical and diagonal directions respectively, and the information entropy is 7.9995, which is closer to ideal value 8. Experimental results and security analysis show that the proposed algorithm has high security performance and can resist various attacks.
Keyword:
Image encryption
CML model
Intermediate chaotic sequences
Forward diffusion
Reverse diffusion
期刊
IF:
3
论文数:
2.0W
被引数:
3.2W
机构
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