Image Reversible Encryption Simulation Based on Multi-Chaos Mapping Algorithm
Original image can be encrypted by randomly disrupting the matrix elements.And the encrypted image can prevent known attacks.Reversible mapping can achieve pixel scrambling.However,the initial conditions of dis-crete chaotic sequences are sensitive.Therefore,a method of reversible encryption for images based on a multi-chaotic mapping algorithm was presented.In the process of image encryption,diffusion scrambling and Arnold trans-form were used to shuffle the images,and then a discrete chaotic sequence was generated through the logistic mapping system and Chen system.After scrambling,XOR operation was applied to the three primary colors,red,green and blue in images respectively,and thus to output the encrypted image.In the process of image decryption,inverse mapping was performed on diffusion scrambling,Arnold transforms and image encryption respectively.Finally,the decrypted image was output to complete the reversible encryption.Experimental results show that compared with the original im-age,the pixel value distribution of the decrypted image of the proposed method is more uniform.Meanwhile,the corre-lation between adjacent pixels is lower,and the robustness is stronger.
Multi-chaotic mappingReversible encryptionMapping system
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