Research And Design Of Network Audio And Video Communication System Based On End Hopping

With the further development of the Internet in various fields of economic society,the situation of network security is facing more severe challenges at the same time.The problems of network security are getting worse day by day,however,the traditional defense technology of network security is not able to deal with them effectively.Under the circumstances above,the research of active defense technology is imperative.As a typical active network defense technology,end hopping has begun to gain more attention and research by more and more scholars and be applied to the traditional network communication.The end hopping technology is based on the communication parameter transformation mechanism.One or both parties to the communication change the network parameters used in communication synchronously and pseudo-randomly in accordance with the agreed laws and policies,therefore destroying the attacker's interference and attacks and implementing active network protection.Based on a lot of research on the technology of end hopping,this paper mainly aims at the security problems in the traditional audio and video communication process,and designs and implements a network audio and video communication system based on the end hopping.The paper adopts a distributed NTP server mechanism to solve the problem of paralysis caused by a single centralized NTP server by deploying multiple distributed NTP servers in the network.In the end hopping system,an identification authentication based on discrete logarithm algorithm is introduced,which can initially filter the illegal users.According to the randomness of end information selection,an end information selection algorithm based on chaotic sequences is proposed to ensure the randomness of the end information hop,make it more difficult for the attacker to analyze,realize active network defense.This paper firstly introduces the research background and significance of the end hopping technology,analyzes the research status of the active cyber defense technology at home and abroad,and then introduces some related technologies involved in this subject.After that,the paper gives a formal description of the network audio and video communication based on the end hopping,and constructs the communication system model.Then paper describes and implements the key modules in the model.Finally,the prototype of the network audio and video communication system based on the end hopping is tested,and the anti-DoS attack capability and the anti-eavesdrop attack ability of the system are mainly tested.The experimental results prove that this system can realize the active network defense,and protect the security of the data in the communication process.