Chaotic Scrambling and Encryption Method of Image
Shuguo Yang · Journal of Qingdao University of Science and Technology · 2009
A new chaotic scrambling and encryption method of image is proposed.Firstly,a sequence of chaotic pairs is generated by use of two coupled chaotic maps,a disordered image can be obtained with the new pixel address codes which are produced by these pairs.Secondly,the disordered image is transformed by DCT,and every DCT coefficient of image is changed 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 above process.The result of simulation indicates the method is feasible,secure and easy to operate.