modeling and simulation study of the propagation and defense of internet email wormnew

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1、1ModelingandSimulationStudyofthePropagationandDefenseofInternetEmailWormCliffC.Zou?,DonTowsley?,WeiboGong??SchoolofElectricalEngineeringandComputerScienceUniversityofCentralFlorida,OrlandoFL?DepartmentofComputerScience,UniversityofMassachusetts,Amhers

2、tMA?DepartmentofElectrical&ComputerEngineering,UniversityofMassachusetts,AmherstMAczou@cs.ucf.edu,gong@ecs.umass.edu,towsley@cs.umass.eduAbstractAsmanypeoplerelyonemailcommunicationsforlongasitcanreplicateandpropagatebysendingcopiesofbusinessandeveryd

3、aylife,Internetemailwormsconstituteoneitselfthroughemailmessages.ofthemajorsecuritythreatsforoursociety.UnlikescanningAlthoughspreadingmaliciouscodesthroughemailisanoldwormssuchasCodeRedorSlammer,emailwormsspreadoveralogicalnetworkde?nedbyemailaddress

4、relationship,makingtechnique,itisstilleffectiveandiswidelyusedbycurrenttraditionalepidemicmodelsinvalidformodelingthepropagationattackers.Sendingmaliciouscodesthroughemailhassomeofemailworms.Inaddition,weshowthatthetopologicaladvantagesthatareattracti

5、vetoattackers:epidemicmodelspresentedin[1],[2],[3],[4]largelyoverestimateepidemicspreadingspeedintopologicalnetworksduetotheir?Sendingmaliciouscodesthroughemaildoesnotrequireimplicithomogeneousmixingassumption.Forthisreason,werelyanysecurityholesincom

6、puteroperatingsystemsoronsimulationstostudyemailwormpropagationinthispaper.software,makingiteasyforattackerstoprogramandWepresentanemailwormsimulationmodelthataccountsforthebehaviorsofemailusers,includingemailcheckingtimeandreleasetheirmaliciouscodes.

7、theprobabilityofopeninganemailattachment.Ourobservations?Almosteveryonewhousescomputersusesemailservice.ofemaillistssuggestthatanInternetemailnetworkfollowsa?Alargenumberofusershavelittleknowledgeofemailheavy-taileddistributionintermsofnodedegrees,and

8、wemodelwormsandtrustmostemailtheyreceive,especiallyemailitasapowerlawnetwork.Tostudythetopologicalimpact,fromtheirfriends[7].wecompareemailwormpropagationonpowerlawtopologywithwormpropagationontwoothertopologies:smallworldInordertounderstandho