Image Scrambling Encryption Algorithm Based on Limited Integer Domain

The purpose of digital image scrambling technology is to put a meaningful image into a disordered one to enhance the resistance ability against illegal attacks so as to improve security. This paper proposes an image scrambling transformation method based on the idea of inverse transformation in finite integer domain. It includes gray transformation and position transformation. At the same time, it analyzes the security and the scrambling cycle of the proposed method. Experimental results show that the proposed method has a good scrambling effect and a long scrambling cycle; moreover, it is easy to realize.