一种新型匿名通信系统及其控制实体的设计与实现

发布时间：2018-05-20 08:42

本文选题：匿名通信 + Tor　；参考：《北京邮电大学》2017年硕士论文

【摘要】：如今网络已经成为人们工作、生活中不可缺少的一部分,与此同时,网络匿名性也逐渐引起人们的重视,被认为是网络安全的重要组成元素。匿名通信就是指通过一定的技术手段,将通信双方的身份信息及通信关系加以隐藏,使其在公开的网络环境中不被攻击者通过非法手段获得。目前世界范围内使用最广泛的匿名通信方案是Tor匿名通信系统,它在保证足够的匿名性的同时,还具有很好的性能。但是它在实际应用中也面临着针对系统匿名性、安全性的种种威胁,因此如何弥补Tor的不足就是本文的基本出发点。本文受SDN中集中控制理念的启发,提出了一种新型结构的匿名通信系统,并实现了其中核心部分,即控制实体。和Tor类似,该匿名通信系统同样使用洋葱路由匿名通信算法,但与Tor不同的是,增加的控制实体可以控制所有代理实体的行为并进行路由选择,从而在保证可用性、安全性、可靠性的前提下,提供了匿名通信的基本功能。本系统借助控制实体的能力,添加必要的功能机制,克服了 Tor存在的部分不足,可以防范低代价传输攻击、低资源路由攻击,还可以抵制部分用户的恶意行为。本文首先介绍了相关研究背景,分析了匿名通信系统的发展现状、Tor匿名通信系统的特点以及不足,进而总结归纳了新型匿名通信系统及其控制实体的功能性和非功能性需求。然后,本文详细阐述了一种新型匿名通信系统的设计及其控制实体的实现。最后,给出了测试用例和结果,验证了该匿名通信系统的有效性。
[Abstract]:Nowadays, the network has become an indispensable part of people's work and life. At the same time, network anonymity has gradually attracted people's attention and is regarded as an important element of network security. Anonymous communication refers to hiding the identity information and communication relationship of both sides of the communication through certain technical means, so that they can not be obtained by an attacker through illegal means in the open network environment. At present, the most widely used anonymous communication scheme in the world is Tor anonymous communication system, which not only guarantees sufficient anonymity, but also has good performance. However, it also faces various threats to the anonymity and security of the system in practical applications. Therefore, how to make up for the deficiency of Tor is the basic starting point of this paper. Inspired by the idea of centralized control in SDN, an anonymous communication system with a new structure is proposed in this paper. The core part of the system is the control entity. Similar to Tor, the anonymous communication system also uses the onion routing anonymous communication algorithm, but unlike Tor, the added control entities can control the behavior of all agent entities and make routing choices, thus ensuring availability and security. Under the premise of reliability, the basic function of anonymous communication is provided. With the ability of controlling entity and adding necessary function mechanism, the system overcomes some shortcomings of Tor, and can prevent low cost transmission attack, low resource routing attack, and resist malicious behavior of some users. Firstly, this paper introduces the related research background, analyzes the development status of anonymous communication system and analyzes the characteristics and shortcomings of Tor anonymous communication system, and then summarizes the functional and non-functional requirements of the new anonymous communication system and its control entities. Then, this paper describes the design of a new anonymous communication system and the realization of control entities in detail. Finally, the test cases and results are given to verify the effectiveness of the anonymous communication system.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP393.08

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