A novel image encryption algorithm based on chaotic system and improved Gravity Model

In this paper, an image encryption based on chaotic system and improved Gravity Model is presented. Firstly, the original image is shuffled according to two chaotic sequences generating by logistic map. Secondly, the shuffled image is diffused using the improved Gravity Model. Thirdly, in order to improve the influences of the encrypted image by changing one-pixel on the plain image, the logistic chaotic system is used to further diffusion once again. Many experiments are done and security analyses are discussed, which show that the novel algorithm has good effect and it can resist common attacks.