This paper discusses problems about video security based on H.264 video compression encoding standard, puts forward a design scheme of encryption about video meeting. The video encryption system combines with AES (Advanced Encryption Standard) algorithm, H.264 and the chaos encryption. In this scheme, AES is used in encrypting DCT Coefficients and motion vector symbol sequence of H.264. The protection of video movement information and video texture information is achieved in this video encryption system. Chaos encryption technology is used to generate the video conference keys to ensure the unpredictability of the key. Experiments show that the system can achieve rapid video encryption computing and smooth video conferencing .It also can protect video data against wiretapping and attack ,it improve the confidentiality of the communication, Group members can be safe and effective authentication services can be achieved.
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