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In this paper a hybrid approach for image encryption is proposed by combining AES, a standard cryptography algorithm, along with splitting and block permutation. A standard image (Lena) is taken as an input and to enhance the security, the image is divided into 4*4 matrix followed by block permutation before encryption of the image with AES. Comparison of various parameters with and without block permutation confirms the superiority of the proposed method in terms of better results after using splitting and permutation functions. [ABSTRACT FROM AUTHOR]