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时间:2019-02-27
《peer to peer networks for defense against internet worms》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、1PeertoPeerNetworksforDefenseAgainstInternetWormsSrinivasShakkottai,R.SrikantAbstract—Internetworms,whichspreadincomputernet-workswithouthumanmediation,poseaseverethreattocom-putersystemstoday.Therateofpropagationofwormshasbeenmeasuredtobeextremelyhighandtheyca
2、ninfectalargefractionoftheirpotentialhostsinashorttime.Westudytwodifferentmethodsofpatchdisseminationtocombatthespreadofworms.WefirstshowthatusingafixednumberofpatchserversperformswoefullyinadequatelyagainstInternetworms.Wethenshowthatbyexploitingtheexponentialda
3、tadisseminationcapabilityofP2Psystems,thespreadofwormscanbehaltedveryeffectively.Wecomparethetwomethodsbyusingfluidmodelstocomputetwoquantitiesofinterest:thetimetakentoeffectivelycombattheprogressofthewormandthemaximumnumberofinfectedhosts.Wevalidateourmodelsusi
4、ngInternetmeasurementsandsimulations.I.INTRODUCTIONTheadventofmaliciousmobilecodehasleadtoaparadigmFig.1.Graphfrom[1]basedonInternetmeasurementdata,illustratingthenatureofpropagationoftheCode-Red(v2)worm.shiftinInternetsecurityapplications.Earlier,computervirus
5、eswereinherentlylimitedbythefactthathumanmediationwasrequiredforthemtopropagate,whichalsomeantthathumaninterventionwassufficienttocontainthem.However,hostwouldpreventthemfromspreadingeffectively.Ahostwithincreasedconnectivityofcomputersandavailabilityofmightactu
6、allybeunawarethatitisinfected,asnoneofitsinformationregardingvulnerabilitiesofoperatingsystemsandfunctionsareimpaired.Thisfactmeansthatonecandealwithapplications,therehavebeenseveralinstancesofmaliciousworminfestationsbypatching.Hoststhataresusceptibletocodetha
7、tpropagateontheirown.Suchmobilemaliciouscodethewormaswellasthosealreadyinfectedcoulddownloadarenowcalledworms.Interestinwormshasbeenfueledandinstallapatch,whichhasthedualroleofeliminatingthebyheadline-makingattackscausingnearcessationofInternetmaliciouscodefrom
8、thehostandclosingtheholethatenabledservices,andthenamesoftheseworms–suchasCode-Red,theinfectioninthefirstplace.TypicallypatchesareissuedSlammerandBlaster–arenowknowntomostInt
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