An encryption algorithm which combined the process of MPEG video compressing with video encryption based on Lorenz chaotic system was put forward to deal with the security problem of video information. Three dimensional chaotic sequences of Lorenz system were used to encrypt DC, AC and motion vector coefficients during the compressing of I frame, B frame and P frame. The luminance information of I frame was encrypted among blocks by the chaotic sequence. The algorithm is secure and real-time because the encryption is done during the process of video compressing.

The paper defined fractal art based on the essential theory of fractal-chaos, expressed structural means of fractal figures in line with its track and distribution, and made use of these methods to construct a series of M-J fractal-chaos figures, showing the beautiful fine structure of the fractal set. The paper provided a definitely new view and an application base for applying fractal-chaos theory and technique in the area of digital media.