资源描述：
《constructionofhighdep省略rebasedonquorum》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、2010,Vol.15No.3,210-216ArticleID1007-1202(2010)03-0210-07DOI10.1007/s11859-010-0306-6ConstructionofHighDependableDistributedAccessControlArchitectureBasedQuorumSystemon□XIONGTinggang1,2,LUZhengding1†,ZHANGJiahong2,MAZhong21.SchoolofComputerScienceandTechnology,HuazhongUniversityofScie
2、nceandTechnology,Wuhan430074,Hubei,China;2.WuhanDigitalandEngineeringInstitute,Wuhan430074,Hubei,China0IntroductionInadistributedsystem,accesscontrolisfacilitatedbydevices,suchasauthorizationserver[1],roleserver[2],orauthorizationengine[3],andprovideduserswithsomekindofservice.Authori
3、zationserveralwaysbecomesamainattackedobjectbecauseitisasingleendpointandcrucialpartinsystem.Theaccesscontrolindistributedsystemwillgetintochaosonceithasbeendestroyed.Intheexistingengineeringapplications,costlyhighreliableserversarepurchasedorreinforcedtechnologiesandfirewalltechnolog
4、iesareadoptedtoprotecttheservers[3].However,thecapabilitytoincreasethedependabilitylevelofasingleserverisalwayslimited.Quorumsystemisanaggregatesystem[4]basedonredundancy.Itconstructshigherdependablesystembyorganizingseveralsinglecomputernodeseventhoughtheyareofnormaldependability.Iti
5、sapreferablemodeltoimplementdependabletechniquesandhasbeensuc-cessfullyappliedintheresearchesofdistributedcontrolandmanagement,suchasdataduplication[5,6],mutualexclusion[7],anddistributedselectivedisseminationofinformation[8].Naoretal[9]presentedtheidealofapply-ingquorumsystemtoaccess
6、controlanddigitalsignature,butitdiscussedmerelythemethodstoprotectdataob-jectsbyassumingthatauthorizationserversarecom-pletelydependableanddidnotmentionthedependableproblemofserversthemselves.Startingwithgeneralac-cesscontrolarchitecture,Xiongetal[10]proposedadis-©WuhanUniversityandSp
7、ringer-VerlagBerlinHeidelberg2010Abstract:Quorumsystemisapreferablemodeltoconstructdis-tributedaccesscontrolarchitecture,butnotallquorumsystemcansatisfytherequirementsofdistributedaccesscontrolarchitecture.Aimingatthedependableproblemofauthorizationserverindistrib-utedsystemandcombini
8、ngthe
