基于信任机制的无线传感器网络安全研究

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1、广东工业大学硕士学位论文ABSTRACTTherearemoreandmorenetworksecurityproblemsOCCULTiI唱inwirelesssensornetworksbecauseoftheresource．constrainedsensornodesandthepoorsurroundings．Asregardsthefactthattheencryption-basedmethodcouldavoidtheexteriorattacksbutcouldn’tresolve

2、theinternalattackswhichoccurwhennodesarecaptured，whilethetrustmechanismdesignedtoresolvetheinteriorattackscoulddistinguishcapturednodesfromnetworkstimely．Thisthesisaimstocombinethetwomethodsintoanintegratedprogram．Meanwhile，thecurrenttrustmechanismpays

3、moreattentiontotheframedesigningthanmonitoringmodules．Soithasmanyproblems，suchashigherenergyconsumptionandlowQoSandSOon．Therefore，thisthesisalsoattemptstofmdthewaytoreducetheenergyconsumptionatthebasisofgoodqualityofthetrustmechanism．Followedarethequer

4、iespresentedandtoberesolvedinthisthesis．—。二～一-1，口2r—d1．Atfirst，thethesisgaveasimpledescriptionoftheWirelessSensorNetworksstructure，thearrangementofsensornode，andthedifferencesfromtraditionalnetworkfigures．Then,itconductsananalysisandsummaryaboutthesecu

5、ritymenaceandprotectionschedule．Basedontheinvestigationsitpresentsthebasicgoalofnetworksecurityunderthegivenenvironmentwhichshouldbetakenintoconsideration．2．Thetrust．baseddynamicencryptionprogramwasproposedtosettletheproblemsofcollusionexistedintheWire

6、lessSensorNetworksdynamicencryptiondistributionscheme．ItintroducestrustmechanismintotheprocessofdynamicencryptionmanagementandmonitorsthecapturednodesinitiativelyaccordingtotrustvalueofthenodesSOthatextrudestheunsafecapturednodesfromnetworkencryptionse

7、curitysystemtimely．Inemulation，theprogramsucceedstosolvetheproblemofcollusion．3．AnalyzingtheQoSoftheavailabletrust-managementprogramandpointingoutthattherestillWaslargeroomforimprovementsinenergyconsumption，expandability,communicationloadandcalculation

8、complexity．Basedontheanalysis，itputforwardanefficienttrustmanagementprojectwhichnotonlycouldobtainthedataofthenodes’actionABSTRACT⋯⋯⋯一．．=E=!===自gE==!!g============!===

9、=!=!=====!{===目==!E}自======自{目=====!==皇viatherandommonitoringmechani