An image encryption scheme using self-adaptive selective permutation and inter-intra-block feedback diffusion

In recent years, several image encryption schemes have been proposed based on new chaotic maps. However, algorithmic design and innovation of the permutation-diffusion architecture are also important. In this paper, the selective permutation is designed as a self-adaptive method to replace the traditional confusion method, which means a novel technology can be used for permutation rule generation. Furthermore, we propose a feedback-based diffusion mechanism that can act on inter-intra blocks, so a slight modification can influence the values of the current block and another block. The security of the proposed scheme originates from the improved permutation-diffusion method, which makes the cryptosystem secure against statistical attacks and differential attack.