1、‘B川m殂⑧天畢大謦碩士學(xué)位論文_^■圈●嘎秣|躅哪■勘la一學(xué)科專業(yè)：計(jì)算機(jī)應(yīng)用技術(shù)作者姓名：牛松森指導(dǎo)教師：李明楚教授2006年2月ABSTRACTTheconceptionofCooperativeComputingforMultiUSerSwillchangetheviewofpeopleon‘‘computing’thoroughlyforitsuppliesforanewcomputemodeTheconcretereali

2、zationofCooperativeComputingforMultiusersisGridsystemTheGridsystembreaksthroughtherestrictionsthatimposedtoitpreviouslyandmakespeoplesolvingcomplicatedproblemmorefreelyandmoreexpedientlyWiththepowerfulfunctionsGridtechno

3、logiesCallbringgreatconveniencetoscientificresearches，muchattentionmustbegiventothesecurityofthenetworkapplicationsSOthatinformationwon’tbeleakorstolenwhileusingthefastandconvenientfimctionsandservicesAsthefirstandmostim

4、potantdefentline，anthenticationisfatalExistingGridsecuritycertificatemodelsinclude：centralizedCA(CertificateAuthority)model，multi—CAmodelandcrossedcertificatemodelButthesemodelshavevariousdefectsWhileusingcentralizedCAmo

5、delormultiCAmodel，managingcertificateswillbeverycomplicatedandtheamountofdataandupdateamountsaregreatbymeansofadoptinggeneralmanagementmodeofthecentralizedmodelWhenadoptingcrossedcertificatemodel，theselectionofthepathwil

6、larisesThispaperresearchesanddesignsafixedcertificatemodelbasedonX509andKerberosThismodelofferssuchfunctionsasusersIDcertification，issuingcertificateanddigitalsignatureInthismodel，theissueandmanagementofend—users’certifi

7、catesislikethecentralizedmodelinwhichanindependentcertificationcenterissuesthecertificatesandfinallyascendsausertrustedrootcertificationcenterIntheGridenvironmentdiverse‘‘organizations’’areclassifiedaccordingtodifferentc

8、ertificatestrategiesandcomprisedifferentstrategydomaincombinationsneyareconnectedbystrategySelVelSandtherootCAwhichactingasamanagementcenterHowevertherootCAisonlyresponsibleformanagingthe‘organization’anddoesn’ttakeparti