P2P網(wǎng)絡(luò)中的匿名通信算法研究

論文編號:TX253  論文字?jǐn)?shù):17539,頁數(shù):49 有開題報(bào)告，任務(wù)書，

摘    要
 隨著計(jì)算機(jī)網(wǎng)絡(luò)的日益普及以及因特網(wǎng)的迅速發(fā)展,網(wǎng)絡(luò)已經(jīng)廣泛應(yīng)用到了個人,團(tuán)體和政府部門之間的通信。網(wǎng)絡(luò)安全和隱私通信日漸受到人們的關(guān)注和重視，許多因特網(wǎng)應(yīng)用都需要匿名支持，匿名通信的研究成為當(dāng)前的一個研究熱點(diǎn)。為了滿足各種隱私需求，我們有必要研究匿名通信的相關(guān)技術(shù)。
 P2P網(wǎng)絡(luò)中主要采取重路由技術(shù)進(jìn)行匿名通信，而采取重路由技術(shù)的匿名機(jī)制有Mix和洋蔥路由。Mix機(jī)制為實(shí)現(xiàn)匿名通信技術(shù)提供了可行的解決方案，但攻擊者仍可以在一定程度上通過流量分析來獲取通信關(guān)系。為了進(jìn)一步提高M(jìn)ix機(jī)制對抗信息量分析攻擊的能力，提出了分組填充的思想，并基于分組填充Mix策略給出了一種新型匿名通信機(jī)制。與傳統(tǒng)Mix機(jī)制相比，新的基于分組填充的Mix機(jī)制，能在有效抵御信息量分析攻擊的同時，進(jìn)一步降低網(wǎng)絡(luò)的額外帶寬開銷。
 最后，利用NS2對基于分組填充Mix機(jī)制和基于P2P網(wǎng)絡(luò)的Mix網(wǎng)絡(luò)通信進(jìn)行了模擬。
 
關(guān)鍵詞：P2P；NS2；Mix；匿名通信；分組填充

Research of the anonymous communications algorithm in P2P network

Abstract
  With the rapid progress of information technologies, computer networks have been widely used in communications among individuals, parties and governments. Concerns on security of network and privacy of communication have been grown. Anonymity needed by many applications on Internet, A research focus which become present of research of anonymous communication. We study the problems of partially connected network traffic camouflage, rerouting path selection in anonymity systems and scalar anonymity.
 The rerouting path selection is a most popular technology for P2P anonymous communication. It is usually implemented in the Mix mechanism and Onion Routing Protocol. The Mix mechanism has provided a feasible solution for the realization of anonymous communication, but to a certain degree, the attackers can still obtain the correspondence relations through traffic analysis. In order to further improve the ability of Mix mechanism to resist the traffic analysis of message volume, a kind of scheme named group padding is proposed, and based on which, a novel anonymous correspondence mechanism is designed additionally. Compared with the traditional Mix mechanism, the newly proposed Mix mechanism based on group padding scheme can resist traffic analysis of message volume effectively, and needs lower extra bandwidth simultaneously.
 Finally, utilize NS2 platform to simulate and analysis about a grouped padding Mix mechanism and the Mix network communication based on P2P.
 
Key words: P2P；NS2；Mix； anonymous communication；group padding

目  錄

目  錄 III
1 緒  論 1
1.1 課題研究背景與意義 1
1.1 國內(nèi)外研究現(xiàn)狀 2
1.1.1P2P系統(tǒng)中的匿名性 3
1.1.2基于P2P的匿名通信機(jī)制 4
1.2 論文結(jié)構(gòu)和研究內(nèi)容 6
1.3 本章小結(jié) 6
2 P2P中的一種基于分組填充Mix策略的匿名通信機(jī)制 7
2.1 引  言 7
2.2 信息量分析攻擊 8
2.3 基于分組填充Mix策略的匿名通信機(jī)制 8
2.4 本章小結(jié) 9
3 NS2平臺簡介 10
3.1 NS的簡介 10
3.2 NS原理 11
3.2.1豐富的構(gòu)件庫 12
3.2.2離散時間模擬器 11
3.2.3分裂對象模型 12
3.2.4開放的源代碼 13
3.3 NS的一般過程 13
3.4 本章小結(jié) 14
4 模擬與分析 15
4.1 基于分組填充Mix節(jié)點(diǎn)模擬 15
4.1.1Mix基本模型 15
4.1.2模擬過程及結(jié)果 15
4.1.3模擬總結(jié) 22
4.2 基于P2P的Mix網(wǎng)絡(luò)通信模擬 22
4.2.1基于P2P的Mix網(wǎng)絡(luò)模型 22
4.2.2模擬過程及結(jié)果 23
 4.2.3模擬總結(jié) 27
4.3 本章小結(jié) 27
結(jié)  論 28
致  謝 29
參考文獻(xiàn) 30
附錄A：Mix_Simulation_Result 32
附錄B：部分模擬代碼 36
附錄C：模擬程序環(huán)境搭建說明 44