Trusted_Computing_Overview

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1、InfineonWhitePaperTechnology,ImplementationandApplicationoftheTrustedComputingGroupStandard(TCG)Technology,ImplementationandApplicationoftheTrustedComputingGroupStandard(TCG)SecureplatformsprovidenewlevelsofsecurityAuthors:HansBrandl,ThomasRosteckTranslationoftheoriginalpaperfrom:Datenschutzu

2、ndDatensicherheit,Vieweg,September2004IntroductionInrecentyears,thenecessity,functionalityandnewpossibilitiesoftrustedcomputingaswellasthefearsandmisgivingswhichitprovokeshavebeenahottopicofdiscussioninmanyforums.Inthemeantimethistechnologyhascomeofage,initialstandardshavebeenagreeduponandPCs

3、arenowequippedwithit.Whataretherealissueshere?1PurposeandcontentoftheTCGspecificationOneoftheasyetunresolvedproblemsofwidelyusedsecurityapplicationsistoprotectthehardwareplatformagainstattacksonitsintegrityormodificationofthesecuritysoftware.TypicalpublishedexamplesaretheattackscarriedoutbyCC

4、ContheHBCIHomebankingSystemorthepossibleattackdescribedin[Cre01]againstasignatureapplicationwhichwasevencertifiedinaccordancewiththeGermansignaturelaw.Currentapproachesforsolvingthisproblempurelyatthesoftwarelevelarebytheirveryprincipleunpromising.Ashassincebeenamplyconfirmedfromexperienceand

5、securitytrendsinthesmartcardworld,atrustedandtamperproofsecuritybasiscannotbeimplementedusingsoftware-basedsolutionsalone.ThisofcourseappliesequallytohostsystemssuchasPCplatforms.Althoughinthemilitaryandgovernmentsectortherehavebeensomeattemptstodeveloppurelysoftware-basedhigh-securitysystems

6、,eventhereaccesstotheappropriatehardwareisgreatlylimited.Anadditionaldisadvantageisthenthatthefunctionalityandflexibilityoftheoperatingsystemisgenerallyveryrestricted.Today'swidelyusedapplicationsinaMicrosoftWindows®dominatedenvironmentarebasedonconvenienceandareeasyandintuitivetouse.Conseque

7、ntly,flexibilityandease-of-usearealsocriticaltocommercialsuccessinthecaseofsecureandtrustedoperatingsystems.MajorcompaniesinthePCsectorhavethereforejoinedforcesandbegunworkingtosolvethisproblemwiththeaidofanewhardwareapproachandthecreationofa