An improved image encryption method based on total shuffling scheme

Abstract

In this paper, an improved image encryption method based on permutation-diffusion architecture and total shuffling scheme is proposed. In the permutation process, the P-box, which makes every image shuffle the position of pixels by its own P-box, depends on the plain-image. In the diffusion process, the keystream is related to the plain-image directly and a more secure feedback is employed to change the number of iterations of the chaotic map. Moreover, a reverse diffusion process is added to protect the final cipher-image. Our experimental results of statistical analysis, information entropy analysis and sensitivity analysis demonstrate that the improved algorithm is more secure and reliable than the original one and it can avoid the category of attacks similar to Ref. [5]. © 2012 Springer-Verlag GmbH.