BeliefandSurveyPropagationforSAT信仰和调查传播的SAT

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1、SecurityofSensorNetworksTanyaRoostaTRUSTSeminarUCBerkeley,November9,20061OverviewTaxonomyofattacksonsensornetworksConvergenceanalysisofReweighted-Treesum-productalgorithmsTimesynchronizationsecurityReputationsystemfortrackingGametheory2OverviewTaxonomyofattacksonsensornetworksC

2、onvergenceanalysisofReweighted-Treesum-productalgorithmsTimesynchronizationsecurityReputationsystemfortrackingGametheory3BackgroundonSensorNetworkWirelessnetworksconsistofalargenumberofmotesself-organizing,highlyintegratedwithchangingenvironmentandnetworkHighlyConstrainedresour

3、cesprocessing,storage,bandwidth,powerFacilitatelargescaledeploymentHealthcareSurveillanceCriticalinfrastructure4MotivationSometimesdeployedinhostileenvironment,andhaverandomtopologyVisionistointegratesensorsintocriticalinfrastructure,suchaswirelessSupervisoryControlAndDataAcqui

4、sitionsystems(SCADA)Traditionalsecuritytechniquescannotbeappliedbecause…5ChallengesUniquetoSensorNetworksRandomTopologySecureaggregationContextprivacy[PMRSSW06]Scalabilityoftrust/keymanagementschemesPowerandcomputationefficiency[PMRBSSW06]“SameerPai,MarciMeingast,TanyaRoosta,Se

5、rgioBermudez,ShankarSastry,StephenWicker.“PrivacyinSensorNetworks:AFocusOnTransactionalInformation”.UndersubmissiontoIEEESecurityandPrivacyMagazine6SecurityAttacksonSensorNetworksNeedtohaveacomprehensivetaxonomyofsecurityandconfidentialityattacksonsensornetworkstodescribe[RSS06

6、]:Attacker’sgoalTrustmodelSecurityrequirementsVarioustypesofattacks[RSS06]TanyaRoosta,ShiuhpyngShieh,ShankarSastry."TaxonomyofSecurityAttacksonSensorNetworks".IEEEInternationalConferenceonSystemIntegrationandReliabilityImprovements20067Attacker’sGoalEavesdropping(outsiderattack

7、er)Disruptionofapplications(insiderattacker)Subvertingasubsetofsensornodes(insiderattacker)8ThereisusuallyacentralbasestationthatgathersallthedatareportedbythesensornodesOnlytrustassumption:thebasestationistrustworthyNoothertrustrequirementisplacedTrustModel9SecurityRequirement

8、sConfidentialityAuthenticationIntegrityFreshnessSecure