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1、浙江工業(yè)大學碩士學位論文支持OGSA的網格安全基礎設施研究和改進姓名：馬珂絳申請學位級別：碩士專業(yè)：計算機應用技術指導教師：蔡家楣20050501浙江工業(yè)大學foi{Ij研究生學位論義嘲格立牟環(huán)境支撐’嚴臺模型的研究年n改進增強ResearchandImprovementofGridSecurityInfrastructureSupportingOGSAABSTRACTGridisaglobalsolutiontoaddresstherequirementsofmoreandmorecomputingability．Gr
2、idisdifferentfromtraditionalnetwork．Computingresourcesandusersaredistributedinagridisdynamic．Avirtualtrustrelationshipmustbeestablishedanddestroyeddynamically．ThevirtualtrustrelationshipneedtObreakthroughthelocationofgeogmphNthemeansofshareorcooperation，andconstr
3、alnsofusingcomputationalresourcesineachindependentsecuritymechanism．Gridcomputingsystemwillhelppeopletosolvemanyproblemsthatcouldnotbesolvedpreviously．Itisanewway,looserandmoreconvenient．Incontrasttotraditionalnetworkenvironment，鰣denvironmentshaveabroaderrangofse
4、curityrequirements．Howtoshareresourcessafelyinadynamic，interdomalnanddistributedcomputingenvkonmenLandhowtointeroperatewith，ratherthanreplaceandmodify,thosesecuritymechanismsisagreaterchallengeforgridcomputingsystem，andisalsotheprincipalproblemofthesecurityenviro
5、nmentplatformforgrid．GridSecurityInfrastructure(GSI)istheimplementationofexistinggridsecuritysolutionofOGSAinGlobusToolkit．BasedonGSIandadvancedinforrnationsecuritytechnologies，thispaperpresentsseveralopinionstoimproveandstrengthenthesafety,flexibilityandpractica
6、bilityofgridsecurity．Intheaspectsofprotocols，trustmodelandsecurityinfrastructure，performanceofgridsecurity，themechanismofauthorizationandthemanagementofproxycertificationareimproved．1．InordertoenhanceperformanceofMutualAuthenticationbetweentwoentities，certificate
7、sCachingisimportedtoexpandWebServicesSecurityprotoc01．2．Role-basedmulti-identitiespartialprivilegedelegationtrustedmodelisintroduced．Role—basedauthorizationmappingCanbesolvedinaninterdomancomputingenvironment．Identity—mappinginGSIisreplacedbysecurityoperation-ori
8、enteddelegation．Correspondingarithmeticofsecurityoperation-orienteddelegationisputforward．(Role—basedcredentialmappingandaccesscontr01)．3．ACredentialWalletserv
