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1、AbstractI‘withtherapidpopul撕zali咖ofncMofkan“tsapplicanont0eVer)『aspedof_sodal；life，thesecurityofnetworkhasbecomeanimportantproblem．Accesscontrolisoneoffivesecurityservicesthatmustbeimplementedinthebasicarchitectureforsecureinformationsystemsdefinedinthesecuritystand
2、ard(IS07498—2)byISO．Role-BasedAccessControl(RBAC)isoneofthebestandmostpopularaccesscontrolmodels．ComparedwiththetraditionalDACModelandMACModel，itcanprovidebetterflexibilityandscalability．Basedonthis，aTask-Role—BasedAccessControl(T-P,BAC)modelisbroughtup，whichisinteg
3、ratedwiththeconceptofroleinRBACandtaskinTBAC．T-RBACcaneffectivelyreduceredundantdataandmaketherelatedmanagementmoreconvenient．However,thelackofconstraintssuchastimenarrowsitsdeploymentinsystemswhereamuchhighersecurityrequirementisneeded．Thethesispresentsastudyonexte
4、ndedT-RBACmodelinmilitaryenviroment．First，systematicalresearchesonDiscretionaryAccessControl，MandatoryAccessControl，Role—BasedAccessControlandTask-Role-BasedAccessControl，summarizesthecharacterisitic-s’advantagesanddisadvantagesofthem；Then，analysestheespecialrequest
5、inmilitaryenvironmentandputsforwardamilitaryaccesscontrolmodelbasedontaskandrolecalledAT-RBACmodel(armyTask-RoleBasedAccessContr01)．Themodelputtemporalconstraintintheprocessofeonferingroleandperformingtaskthatenhancetimecharacteristicofthemodel．Inordertodecreaseinhe
6、ritancegranularity,wedividetheroleinheritanceintotwoways：opensuccessionandclosesuccession．Atthesametime，someconceptsareintroducedinthemodel：rolelevel，taskfraction，taskpriority,dependencyamongtasks．ToRBACmodelsoundlystrengthensconstraintandsatisfytheveracityandsecuri
7、tyrequest．Finally,inordertoexplainhowtorealizethissystembasedonT-RBACmodel，thethesisimplementsthegivenmodelinMilitaryDictateAutomatizationSystem．Thethesisdescribestheworkflow,datababasedesignandimportantcodeinthesystem．、^：札，弓頌士學(xué)位論文Abstractr}1t、‘Ps：+cqultshowsthatthe
8、systemcanachieveexpectedfunctionofthemodelaswellasitsteasiblity．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
