Image Scrambling Based on Bit Shuffling of Pixels

Abstract

We propose an image-scrambling scheme based on bit shuffling of individual pixels,which doesnt require iterative computationBits of each pixel are divided into even and odd groupsThose in the even group are swapped so that theoriginal higher bits become lower and vice versa,while bits in the odd group are exchanged with the odd bits in an uncorrelated pixel with a certain offset from the current pixelThe latter is done to reduce the probability of pixel-value being unchanged after bit shufflingExperiments show that the algorithm is effective,robust and faster than the Arnold transform