A New Chaotic Image Encryption Algorithm using a New Way of Permutation Methods

ABSTRACT⎯ This paper presents a novel chaos-based cryptosystem for secure transmitted images. In the proposed block encryption/decryption algorithm, two chaotic permutation methods (key-dependant shift approach and Socek method) are used to shuffle the image pixel bits. These methods are controlled using a perturbed chaotic PWLCM map. The perturbing orbit technique improves the dynamical statistical properties of generated chaotic sequences. Our algorithm is based on tree encryption cryptosystems (Socek, Yang and Xiang algorithms). In this paper, we prove that the proposed cryptosystem overcomes the drawbacks of these algorithms. Finally, many standard tools are performed to quantify the security level of the proposed cryptosystem, and experimental results show that the suggested cryptosystem has a high security level.

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