A Color Image Encryption Scheme Based on Chaos
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Jing Li, Fei Xiang, Junpeng Zhang
In order to improve the security of color image information, a two-dimensional Logistic system is combined with a newl discrete system to propose an image encryption scheme that can greatly expand the key space and enhance security. Firstly, the plaintext digital image is preprocessed, and its R, G, and B components are extracted and converted into a one-dimensional array, and the pseudo-random chaotic sequence generated by the two dimensional Logistic map is mathematically operated. Secondly, using the new two-dimensional discrete chaotic system based on the modified Marotto theorem and the corresponding one-time ciphertext XOR, get three one-dimensional arrays. Finally, convert to a three-dimensional array to get the final ciphertext image. The experimental results show that compared with the traditional chaotic encryption algorithm, it has the advantages of easy implementation, sensitivity to initial conditional disturbance, and large key space.
Chaotic System, Color Image, Logistic Map, Encryption