Research On Controllable Anonymous Communication Technology Based On P2P

With the widely use of the Internet, the security of Internet privacy becomes a crucial problem. Although the network security encryption technology can protect the data content in the communication, it can not protect the users'identities. The Anonymous communication technology can protect users'privacy and realize the classified communication. The main goal of the anonymous communication system is to improve the anonymous and ensure the communication efficiency at the same time. How to solve the anonymous abuse problem in the premise of ensuring the anonymity is also the main problem existing in the anonymous communication technology. The controlled anonymous communication technology is a solution to the anonymous abuse problem at present and is researched on.Firstly, this thesis introduces the rudiments of P2P Anonymous Communication Technology. Then the establishment of anonymity level and the analysis method of anonymity degree is discussed. What's more, this thesis introduces three typical anonymous communication system including MIX, Crowds and WonGoo, and show the implementation of anonymity scheme by the actual system at the same time.Secondly, a new acyclic and grouping path selection mechanism is proposed to solute the large load problem existing in the route choosing when there is a cycle in the routing path selection mechanism and the number of P2P system's node is large. This thesis discusses this mechanism, and analysis its anonymity degree, then compares it with the next routing path selection mechanism.At last, in order to solve the problem of anonymous abuse in the anonymous communication, this thesis proposes a controllable anonymous communication system based on the mechanism of acyclic packet routing called TG-Crowds anonymous communication system, and describes the revocable anonymous communication process in detail. This thesis analyzes the safety and member payload performance of the anonymous system.Overall, this thesis is mainly aimed to solve the anonymous abusing problem, proposes a routing choosing method which is acyclic and based on group, also designs a controllable anonymous communication system which could track the IP address of anonymous attacker and consequently solved the anonymous abusing problem well.