P2P匿名通信协议WonGoo研究

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1、中国科学院计算技术研究所博士学位论文P2P匿名通信协议WonGoo研究姓名：陆天波申请学位级别：博士专业：计算机软件与理论指导教师：方滨兴20060601P2P馘名通信协议WonGoo研究：AbstractResearchoBWonGoo--APeer-to-PeerAnonymousCommunicationProtocolLuTianbo(ComputerSoftwareandTheory)DirectedByProfessorFangBiBxingPrivacyandanonymityon

2、theIntemetaregaining{ncfe豁ingattentionfromboththescientificandthelargeInternetusercommunityinrecentyears．Privacydoesnotonlymeantheconfidentialityofinformation，butalsomeannotrevealingwhoiscommunicatingwithwhom，andhowoften．Anonymityisanessentialrequire

3、mentforprivacyasencryptionalonemaynotbesufficienttoprotecttheconfidentialityofcommunications，Thisthesisfocusesonlow．1atencyanonymouscommunicationsontheIntemet．Themaincontributionsarelistedasfollows：WefierygiveasurveyofanonymityontheInternet。Thenwedes

4、ignandimplementWonGoo，ascalableandpracticaldecentralizedpeer-to-peerprotocolthatprovidesstronganonymityandhi曲efficiencywithlayeredencryptionandrandomforwarding．Wereducetheencryptionoverheadwhenlengtheningtheanonymitypathforstrongeranonymity。WonGooisa

5、tradeoffbetweenanonymityandefficiency，providingvariableanonymity．ComparedwithotherlayeredencryptionMD(protocolsandCrowds．WonGoohassomeadvantageinprovingitscorrectness,obtainingpracticality,correctnessandefficiencyinencryptioninthewaydifferingfromthel

6、ayeredencryptionsystemsthatcanbedifficulttoachievecorrectnessofschemes．Secondly,wedevelopaGossipalgorithmforPeerDiscoverybaseduponnodeLocalin—de黟ee(GPDL)，usingonlylocaltopologyinformationinsteadofglobalsinceit'spracticallyverydifficulttogetglobaltopo

7、logyinformationinlarge—scaledecentralizedpeer-to-peernetworks．Ourgoalistryingtodiscoverpeersuniformlyinthewholenetworkaswellastodiscoverrobustnodes．Theideabehindourgossippeerdiscoveryisthatthelargerthedegreeofanode，thebetteritsrobustness．Simulationss

8、howthatthenetworkunderGPDLalgorithmishighlyclustering,anditsaveragediameterisalmostnotinfluencedbythedynamicsofnodes．W油timepassing,anodecandiscoverrobustnodes．anditsneighborsarenearlyselecteduniformlyfromthewholenetwork．Thirdly,wereviewtheuniversalre