Novel Chaotic Scrambling and Encryption Method of Image
Shuguo Yang · Jisuanji gongcheng · 2009
This paper proposes a novel chaotic scrambling and encryption method of image.It uses two coupled chaotic maps to generate a sequence of chaotic pairs,disorder the original image with the new pixel address codes which are produced by these pairs and gain disordered image,transforms the disordered image by Discrete Cosine Transformation(DCT),and change every DCT coefficient of image with the aid of a chaotic sequence in DCT domain to complete the encryption of image.The process of decryption and the anti-scrambling is the inverse of the process above.Simulation experimental results show that the method is feasible,security and easy to operate.