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1、EpidemicProlesandDefenseofScale›FreeNetworksLindaBriesemeister,PatrickLincoln,PhillipPorrasSRIInternational333RavenswoodAvenue,MenloPark,CA94025,U.S.A.rstname.lastname@sri.comABSTRACTWereporthereonpreliminaryresearchaimedatbuildingaframeworktohelpunderstandhowtodefendnetworksInthispaper,westudyt
2、hedefensibilityoflargescale-freewithcertainpropertiesfromworms.Thestartingpointsnetworksagainstmaliciousrapidlyself-propagatingcodesuchofourresearchincludethreemainpoints:(1)studiesofaswormsandviruses.Wedevelopaframeworktoinvesti-wormsandvirusesandthestrategiestheyemploytoinfectgatethepro lesofsuc
3、hcodeasitinfectsalargenetwork.agivensystem,andmoreimportantly,theirstrategiesforBasedonthesepro lesandlarge-scalenetworkpercolationpropagation(howtheytargetnewsystemstoattack),(2)studies,weinvestigatefeaturesofnetworksthatrenderthemstudiesofpercolationandepidemicspreadinlargenetworksmoreorlessdefe
4、nsibleagainstworms.However,wewishexhibitingkeypropertiesobservedinintranetssuchasscale-topreservemission-relevantfeaturesofthenetwork,suchfreeness,and(3)studiesofpreservationofmissioncriticalasbasicconnectivityandresiliencetonormalnonmaliciousfunctionalityforanetwork.outages.Weaimtodevelopmethodst
5、ohelpdesignnetworksObviously,relativesafetyfrommaliciouswormoutbreaksthatpreservecriticalfunctionalityandenablemoree ectiveisachievablethroughreducednetworkconnectivity.Inthedefenses.extremecaseoftrulydisconnectednetworks,wormscan-notpropagatefromonepartitionofthenetworktoanotherCategoriesandSubje
6、ctDescriptors(nevermindthatmanynetworkpartitionsclaimedtobeC.2.0[Computer-CommunicationNetworks]:General
7、airgapped"su eredfromwormandvirusoutbreaksorig-securityandprotectioninatingfromotherpartitions.ForensicevidencethatthenetworkswereconnectedinunauthorizedwayssuggestitGeneralTermsmaybeimpractic
8、altorelyonthismethodofdefense.)Ifwepresumenetworksareconnected,defensibilityconsider-Algorithms,Securityationsmotivateextremelysparseconnectivitybetweennet-workpartitions.However,randomfailurescan,withun-Keywords
