Architecture and secure implementation for video conferencing technique

With rapid development of various multimedia technologies, ample amount of multimedia data are generated and transmitted for different usage incliding commercial, medical, military etc, and if they are not well protected, the data may be accessed by opponents or unauthorized users. Thus, security and privacy protection of the important messages have become important issues, and a number of techniques based on selective, entropy-based and/or complete encryption are developed. In this paper, we consider some existing cryptographic techniques namely trusted third-party, RSA, GDH.2, RC4 etc. and integrated themselves in such a way that an overall securiy protection to the video conferencing is achieved. Both the required block diagrams and the protools of the proposed scheme are provided, and a security and performance analysis show that it is well secured, computation-efficient and applicable for real life operations.