Research On Encryption Agen Service Technology

Extensive use of the Internet is affecting and changing people's lifestyles and its application areas is increasing widely, but, the security issue is also very prominent. In electronic transactions, online shopping, anonymous voting and other application areas, the user's privacy is very important, all the participants hope that their acts can not be known by any other person, or just not be known by some people (such as network perpetrators). To resist the attacker's eavesdropping and traffic analysis, anonymous communication technology have emerged, this technology can hide the identities of communicating parties or communication relationships between them so that any attacker can not find out who is the sender, who is the receiver, consequently, it provides the protection of the user's privacy.Firstly, this thesis outlines the basic concepts of anonymous communication, communication model, anonymous types, anonymous features as well as anonymous degree classification, besides, the thesis introduces the main implementation technologies of anonymous communication, including rerouting technology, traffic camouflage technology, broadcast and multicast technology as well as the cryptographic system, secure transmission technology and digital signature technology which must be used in anonymous communication.Secondly, this thesis researches to the Fast-Flux service network technology, its operational mechanism, and focus on analyses the single-flux and double-flux service networks, as well as their working mechanism and the essential difference between them. Further more, it analyzes the advantage for the attacker about Fast-flux service network.Finally, by analyzing the communication mechanisms of Mix, Crowds and WonGoo anonymous communication systems, this thesis presents a new control strategies of forward path length which use convergence in probability, and theoretic analysis and simulation were made.Besides, based on the Fast-flux service network technology and WonGoo communication technology anonymous, this thesis designs a scheme of encryption proxy service. This scheme provides a effective solution to IP-failure problem and ensures load balancing, moreover, the communication mechanism of WonGoo anonymous communication system has been improved by the control strategies of forward path length which use convergence in probability, through the layered encryption and random forwarding, the system not only achieved the strong anonymity and high efficiency, but also reduced the communication latency while ensuring the anonymity degree of the system.