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时间:2019-05-31
《基于组群的有限路长匿名通信协议》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第40卷第4期计算机研究与发展VoI.40,No.42003年4月JOURNALOFCOMPUTERRESEARCHANDDEVELOPMENTApr.2003!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!基于组群的有限路长匿名通信协议王伟平陈建二王建新眭鸿飞(中南大学信息科学与工程学院长沙410083)(vac@cs.hn.cn)摘要匿名通信是指通过一定的方法将业务流中的通信关系加以隐藏,使窃听者无从直接获知或推知双方的通信关系或通信的一方.基于组群的匿名
2、实现了通过多主机的转发对发送者或双方通信关系的隐藏,典型的实现如Crowds利用转发概率实现了发送者一定程度的匿名,但系统中路径长度没有上界,在极端的情况下可能会使转发路径无限长,这对网络服务来说是无法接受的.基于组群的有限路长匿名通信协议是一种改进的匿名通信协议,实现了路径长度的有界性.该协议获得的匿名度与路径长度I、泄密者比例、组群大小之间具有定量的关系.协议中通过构造一随机函数对路径长度随机取值,降低了发送者暴露的可能性.相关计算数据表明,在相同路径长度期望下,有限长度协议比Crowds具有更强的抗泄密能力.关键词匿名通信协议;有
3、限长度路径;抗泄密能力中图法分类号TP393.08AnAnonymousCommunicationProtocolBasedonGroupswithDefiniteRouteLengthWANGWei-Ping,CHENJian-Er,WANGJian-xin,andSUIHong-Fei(CollegeofInformationScienceandEngineering,Central-SouthUniuersity,Changsha410083)AbstractAnonymouscommunicationcanhidethecomm
4、unicationreIationshipfortrafficfIowbyusingsomemethods,sothateavesdroppercannotdirectIyknoworeasiIyinducethereIationorinitiatorofcom-munication.AnonymitybasedongroupsreaIizestheanonymitybytransmittingpacketsforwardbyhostsinthegroup.TypicaIprototypesuchasCrowdscangiveiniti
5、atoranonymityinacertainextentbyusingfor-wardprobabiIity.ButthereisnoupperboundfortheIengthofroute,undertheextremecircumstancetherouteIengthwiIIbeinfinitewhichcannotbeacceptedbynetworkservice.AnanonymouscommunicationprotocoIbasedongroupswithdefiniterouteIengthisanimproved
6、protocoIforinitiatoranonymitybasedongroups.TheimprovedprotocoIIimitstherouteIength.TheineguationindicatingthereIationofanonymi-ty,Iengthofroute,proportionofcompromisedhosts,andgroupscaIewiIIbegivenandprovedinthispa-per.MeanwhiIe,arandomizedfunctionisconstructedtogenerate
7、randomvaIueforIengthofroutesoastominimizetheprobabiIityofinitiatorexposed.BycomparingthereIateddatacaIcuIatedunderthesameex-pectedvaIuefortheIengthofroute,itisconcIudedthattheimprovedprotocoIhasmorestronganti-compro-misedcapabiIitythanCrowds.Keywordsanonymouscommunicatio
8、nprotocoI;definiterouteIength;anti-compromisedcapabiIity收稿日期:2002-03-08;修回日期:2002-05-13基金项目:国家自然科学基金(90
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