The Transmission System Of Video Encryption Based On Chaotic Algorithms

As one of the main field in informatization construction, video transmission and video monitoring have been widely studied. Because of the network open and other insecurity factors, we often want to transmit data, image and video information by effective encryption. The existing video encryption transmission systems mostly use traditional cryptography on network transmission by software encryption scheme, and real-time video monitoring has also changed from traditional analog centralized monitoring mode to digital video monitoring. Since chaos has the following characteristics:first, sensitivity to the initial conditions and system parameters; second, the key stream satisfies diffusion and confusing principles of traditional cryptography.lt has been applied in cryptography more widely. This thesis mainly studies chaotic stream cipher and self-synchronizing scheme, aims to apply in the video transmission and video monitoring to construct a real-time video encryption transmission system, which has a higher application value in video encryption area.This dissertation first studies sequence cipher and chaos theory, simulates the characteristics of chaotic equation (the period-doubling bifurcation, chaotic attractor, Lyapunov exponent, Kolmogorov entropy) and chaotic synchronization secure communication theory, in which Chaos Masking and Chaos Shift Keying are studied and simulated.Then we study and analyze the digital chaotic cryptography, complete hardware realization of the chaotic sequence cryptographic algorithm and self-synchronization stream sequence cryptographic algorithm. Finally, we download encryption algorithm to the network encryption card, use secondary development of video capture card's SDK (software development kit) to complete the server and the client application software development, and construct the video encryption transmission system.Based on the study of chaos theory, in this thesis, we simulate the two directions of chaos applied in cryptography respectively, and design encryption algorithm based on chaos and the self-synchronizing method of stream cipher. The study result will be a reference for digital chaotic cipher application and provide a feasible scheme for digital video encryption transmission and monitoring system.