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ID:39908028
大小:310.95 KB
页数:8页
时间:2019-07-14
《0cdc-mrf-anomaly》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、1AnomalyDetectioninSensorNetworksbasedonLargeDeviationsofMarkovChainModelsIoannisCh.PaschalidisyYinChenzAbstract—Weintroduceananomalydetectionframeworkforwhichprecludestheuseofsophisticatedsecuritymeasures,wirelesssensornetworksabletodetectstatisticall
2、ysignicantWSNETsareextremelyvulnerabletoawiderangeoftemporalorspatialchangesineithertheunderlyingprocesstheadversarialattacks,exploits,viruses,andotherinformationsensornetworkismonitoringorthenetworkoperationitself.securityvulnerabilities[2].Followinga
3、computersystemsWeconsideraseriesofMarkovmodelstocharacterizethebehaviorofthesensornetwork,includingtree-indexedMarkovapproach,mostoftheliteraturehasonlyconsideredprotocolchainswhichcanmodelitsspatialstructure.Largedeviationsdesignasawaytoaddressthesesec
4、urityconcerns.techniquesareusedtocomparethedistributionoftheMarkovOurworkconsidersanomalydetectioningeneralenoughmodelestimatedfrompastanomaly-freetraceswithitsmosttermsthatcanaccommodateboththemonitoringandnet-recentempiricalmeasure.Wedevelopoptimaldec
5、isionrulesworksecurityrelatedproblemsoutlinedabove.WedeneforeachcorrespondingMarkovmodeltoidentifyanomaliesinrecentactivity.Simulationresultsvalidatetheeffectivenessofthenotionofa“state”associatedwithanodeofthenetworktheproposedanomalydetectionalgorith
6、ms.andassumethatitsevolutionisMarkovian.Weconsideraseriesofmodelsthatcanmodeltheevolutionofthestatebothintimeandinspace,thelatterusingtheconnectivityI.INTRODUCTIONmodelofthenetwork.WepayparticularattentiontotreesWirelessSensorNETworks(WSNETs)arenetworks
7、ofwhichisacommonconnectivitystructureforWSNETs.oftensmalldevicesthatcommunicatewirelleslyandareusedThekeytechnicaltoolweuseislargedeviationsfortomonitor(andcontrol)aphysicalsystem.WSNETnodesMarkovchainsdevelopedin[3,4].Largedeviationstheorycanbepoweredb
8、ybatteriesandhavelimitedprocessingprovidesapowerfulwayofhandlingrareeventsandtheiras-andstorageabilities.Coupledwithappropriatesoftwaresociatedprobabilities.Assumingthatweknowthetransition(protocols)theycanself-conguretoformanet
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