An Improved Image Encryption Scheme Based on Line Maps

In order to avoid the flaw while keeping all the merits of image encryption scheme based on line maps, an improved image encryption scheme is proposed, which extended the original 2D scheme to 3D. An image with size NtimesM is firstly depicted by a 3D bit matrix, and then it is supposed as composed of 8timesM vectors with size N. Line maps are used to stretch the vectors to an array, while the fold map is used to transform the array to a same sized 3D matrix. Simulation results show that the improved image encryption scheme complete pixel permutation and confusion simultaneously, it enhance the security of the original cipher.