姓名:刘峻霖 班级:通信143班 学号:2014101108附 录一、英文原文:DetectingAnomalyTraf?,manySIP[3]/RTP[4]-,someofthesubscriberstothePSTNservicetendtochangetheirhometelephoneservicestoVoIPproducts.,-works,andKThavebeguntodeploySIP/RTP-?mercialVoIPservicesand50%ofalltheusersarejoinedin2009inKorea[1].AccordingtoIDC,itisexpectedthatthenumberofVoIPusersinUSwillincreaseto27millionsin2009[2].Hence,espopular,itisnotsurprisingthatalotofVoIPanomalytraf?chasbeenalreadyknown[5].So,mercialservicesuchasVoIPservicesshouldprovideessentialsecurityfunctionsregardingprivacy,authentication,integrityandnon-repudiationforpreventingmalicioustraf?-larly,mostofcurrentSIP/RTP--layerprotocolssuchasTransportLayerSecurity(TLS)[6]orSecureRTP(SRTP)havebeenstandardized,,un-ed,,theauthenticationkeyssuchasMD5intheSIPheadercouldbemaliciouslyexploited,becauseSIPisatext-,
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