An image encryption using chaotic permutation and diffusion

Abstract

This paper proposes a chaos-based image encryption scheme with a permutation-diffusion structure. In this method the encryption is performed in bitwise manner. Mixing process is introduced to modify the pixel intensity values before encryption process. In the permutation stage the plain image pixels are shuffled and in the diffusion stage the generated random bits are exclusive or with the confused image pixels. Tent map and logistic maps are used to generate Permutation order and Diffusion bits.