Design And Implentation Of Video Encryption System Based On High Dimension Chaos

With the fast development of network service applications, multimedia service has become a part of our everyday life. However, the security of network multimedia service becomes a problem and to secure multimedia information has become an urgent issue needing to resolve. Currently, there are a number of video encryption researches;however, most algorithms are not combined well in security and real-time. For the problem of present video encryption researches that security and real-time cannot be balanced, transfer level video encryption algorithm based on compound chaotic system and storage level video encryption algorithm based on hyperchaostic system are proposed on the basis of chaos cryptography research.First, we use compound chaotic equation based on perturbation technique to produce pseudo-random sequence and capture real-time video with Open CV library. And then we scramble and diffuse each frame of video pixels to get ciphertext image and transport it real-timely on the Internet. Simulation Experiments show that the algorithm has lots of advantages such as perfect encryption effects, quick encryption rate and high real-time.Secondly, we generate pseudo-random sequence by constructing a new hyperchaotic equation based on the H.264 coding standard and encrypt sensitive data in coding process combining the characteristics of CABAC entropy coding, including intra-prediction modes, motion vector difference and residual coefficient. Experiments show that the algorithm ensures high security while making frequency coding format compatible and the code efficiency and compression performance are not affected.Finally, a video high dimension chaotic encryption system is implemented based on the research and design of the two encryption algorithms. The system includes transfer level video encryption and decryption, storage level video encryption and decryption,compatibility with H.264 video codec, video playback, video packaging and other functions. Also, it is suitable for a variety of video applications in various occasions with a friendly interface.