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1、AbstractI‘withtherapidpopul撕zali咖ofncMofkan“tsapplicanont0eVer)『aspedof_sodal；life，thesecurityofnetworkhasbecomeanimportantproblem．Accesscontrolisoneoffivesecurityservicesthatmustbeimplementedinthebasicarchitectureforsecureinformationsystemsdefinedinthesecuritystandard(IS07498—2)byISO．
2、Role-BasedAccessControl(RBAC)isoneofthebestandmostpopularaccesscontrolmodels．ComparedwiththetraditionalDACModelandMACModel，itcanprovidebetterflexibilityandscalability．Basedonthis，aTask-Role—BasedAccessControl(T-P,BAC)modelisbroughtup，whichisintegratedwiththeconceptofroleinRBACandtaskin
3、TBAC．T-RBACcaneffectivelyreduceredundantdataandmaketherelatedmanagementmoreconvenient．However,thelackofconstraintssuchastimenarrowsitsdeploymentinsystemswhereamuchhighersecurityrequirementisneeded．ThethesispresentsastudyonextendedT-RBACmodelinmilitaryenviroment．First，systematicalresear
4、chesonDiscretionaryAccessControl，MandatoryAccessControl，Role—BasedAccessControlandTask-Role-BasedAccessControl，summarizesthecharacterisitic-s’advantagesanddisadvantagesofthem；Then，analysestheespecialrequestinmilitaryenvironmentandputsforwardamilitaryaccesscontrolmodelbasedontaskandrole
5、calledAT-RBACmodel(armyTask-RoleBasedAccessContr01)．Themodelputtemporalconstraintintheprocessofeonferingroleandperformingtaskthatenhancetimecharacteristicofthemodel．Inordertodecreaseinheritancegranularity,wedividetheroleinheritanceintotwoways：opensuccessionandclosesuccession．Atthesamet
6、ime，someconceptsareintroducedinthemodel：rolelevel，taskfraction，taskpriority,dependencyamongtasks．ToRBACmodelsoundlystrengthensconstraintandsatisfytheveracityandsecurityrequest．Finally,inordertoexplainhowtorealizethissystembasedonT-RBACmodel，thethesisimplementsthegivenmodelinMilitaryDic
7、tateAutomatizationSystem．Thethesisdescribestheworkflow,datababasedesignandimportantcodeinthesystem．、^：札，弓頌士學(xué)位論文Abstractr}1t、‘Ps：+cqultshowsthatthesystemcanachieveexpectedfunctionofthemodelaswellasitsteasiblity．Kevwords：AccessControl；RBAC；T-RBAC；Role；Task；AT-RBAC吐●●●，I¨●怎東北大學(xué)碩士學(xué)位論文目錄目
