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1、2015届电子信息工程学院外文文献及译稿狞北科技学院外文文献题目：DetectingAnomalyTraf伍cusingFlowDataintherealVoIPnetwork姓名:专业班级:指导教师:密术超学号:通信B111系（部人叶瑜201103034114电子信息工程学院2015年6月12日DetectingAnomalyTrafficusingFlowDataintherealVoIPnetworkINTRODUCTIONRecently,manySIP[3]/RTP[4]-basedVoIPapplicatio
2、nsandserviceshaveappearedandtheirpenetrationratioisgraduallyincreasingduetothefreeorcheapcallchargeandtheeasysubscriptionmethod.Thus,someofthesubscriberstothePSTNservicetendtochangetheirhometelephoneservicestoVoIPproducts.Forexample,companiesinKoreasuchasLGDacom,
3、SamsungNet-works,andKThavebeguntodeploySIP/RTP-basedVoIPservices.ItisreportedthatmorethanfivemillionusershavesubscribedthecommercialVoIPservicesand50%ofalltheusersarejoinedin2009inKorea[1].AccordingtoIDC,itisexpectedthatthenumberofVoIPusersinUSwillincreaseto27mil
4、lionsin2009[2].Hence,astheVoIPservicebecomespopular,itisnotsurprisingthatalotofVoIPanomalytraffichasbeenalreadyknown[5].So,MostcommcrcialservicesuchasVoIPservicesshouldprovideessentialsecurityfunctionsregardingprivacy,authentication,integrityandnon-repudiationfor
5、preventingmalicioustraffic.Particu・larly,mostofcurrentSIP/RTP-basedVoIPservicessupplytheminimalsecurityfunctionrelatedwithauthentication.Thoughsecuretransport-layerprotocolssuehasTransportLayerSecurity(TLS)[6]orSecureRTP(SRTP)[7]havebeenstandardized,theyhavenotbe
6、enfullyimplementedanddeployedincurrentVoIPapplicationsbecauseoftheoverheadsofimplementationandperformance.Thus,un-encryptedVolPpacketscouldbeeasilysniffedandforged,especiallyinwirelessLANs.Inspiteofauthentication.theauthenticationkeyssuchasMD5intheSIPheadercouldb
7、emaliciouslyexploited,becauseSIPisatext-basedprotocolandunencryptedSIPpacketsarccasilydecoded・Therefore,VoIPservicesareveryvulnerabletoattacksexploitingSIPandRTP.WeaimatproposingaVoIPanomalytrafficdetectionmethodusingtheflow・basedtrafficmeasurementarchi・tecture.W
8、econsiderthreerepresentativeVoIPanomaliescalledCANCEL,BYEDenialofService(DoS)andRTPfloodingattacksinthispapcr?becausewcfoundthatmalicioususersinwirelessLANcoul
