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We demonstrate an optical image encryption scheme using 3-D chaotic map based joint image scrambling and random encoding in gyrator domains. A novel image confusion approach that can well address the drawbacks of typical image permutation ciphers is developed to firstly shuffle the plaintext. Then the scrambled image is random phase encoded in the spatial domain and gyrator transform domain. A three-dimensional chaotic map is introduced to generate key stream elements. Simulations demonstrate that the cryptosystem has satisfactory cryptographic features and owns high robustness against noise perturbation as well as occlusion attack. [ABSTRACT FROM AUTHOR]

Abstract: This paper introduces a new parametric switching chaotic system (PSCS) and its corresponding transforms for image encryption. The proposed PSCS has a simple structure and integrates the Logistic, Sine and Tent maps into one single system. The PSCS shows more general properties, including the Sine and Tent maps as special instances. It has complex chaotic behaviors. A novel image encryption algorithm is introduced using the proposed PSCS and its transforms. Simulation results and security analysis are given to demonstrate that the proposed algorithm can encrypt different types of images with a high level of security. [Copyright &y& Elsevier]