An optimized 2D chaotic mapping system for image security using an improved Sealion optimization algorithm

摘要

An optimized 2D chaotic mapping (O2DCM) system for image encryption using an improved SeaLion optimization algorithm, where the system includes:an initialization processing unit for accepting a 2D logistic card for initializing the encryption of an input image, taking into account the characteristics of diffusion and confusion for encryption;a sequence processing unit for generating the pseudorandom sequences using a complicated chaotic mapping, wherein a chaotic mapping depends on the preliminary system constraints and the order of permutation, and wherein an encryption key, referred to as a key, is provided to a 2D logistic sequence generator;a tuning processing unit to perform a fine-tuning of the initial chaotic system parameters (X0,Y0) whereby a new optimized algorithm called the average fitness based Sealion optimization algorithm is implemented to determine the most favorable chaotic system parameters, and where entropy is maximized by fine-tuning the initial parameters; anda decryption processing unit for decrypting the encrypted image using the encryption key, wherein the decryption process is a reverse encryption process.