Data Encrpytion Techniques For Network Video Conference System

Network Video Conference System effectively realizes the multimedia communication by the Internet. Internet is a world wide open system, and much important information about politics, military, business secret etc is transferred through the internet, so how to keep security of those information is the main problem to research, which include safely save and load, the technology of private date security etc . The technology of encryption is also the very important element.Nowadays, DES is general used in the communication network, which is easily used, fast-programmed and standardized. The software and hardware technology of DES is also very mature, but there are some weaknesses of DES in security and etc. By the deep study of DES, a new improved solution is presented. The solution greatly improve the security by the simulating "one time one password", improve the speed of encrypt and reduce the delay of information transfer by using of software technology. So this solution greatly satisfies the request of Network Video Conference. T'he solution also effectively improves the performance of Enumerating decipher and differential analysis, and makeup the weakness that the password is too short of DES. On the other hand, the speed of ciphering is enhanced, and the time is saved.According to the test result, the advanced solution has the better security and the higher speed. This solution is implemented and applied to the network security system by Beijing Waaser Company, and the feedback is good.In this thesis, the basic knowledge of Network Video Conference System and the implementation process of DEC and Ciphering Arithmetic was introduced, then the improvement solution and the process is specified.