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1、Publishedintheproceedingsofthe9thWork-shoponEnablingTechnologies(WETICE‘2000),IEEEComputerSocietyPress,2000.WalkingtheWebofTrustGermanoCaronniSunMicrosystemsLaboratories,PaloAltoEmail:Abstractrequiredpropertiesonthesystemsside.Thesetwoaspect
2、swillnotbefurtherdiscussedinthispaper.MostcurrentlydeployedPublicKeyInfrastructuresThemostfundamentalaspectoftrustthatisinvolved(PKIs)arehierarchicallyorientedandrelyonacentral-coverstheparticipants(i.e.thepeerauthentication).Allizeddesign.HierarchicalPK
3、Ismaybeappropriatesolu-othertrustrelations,mechanismsandsystemcomponentstionsformanyusage-scenarios,butthereexiststheviablearecreatedtosupportthisfundamentalone.Inparticular,alternativeofthe‘WebofTrust’.Inaweboftrust,eachPublicKeyInfrastructures(PKIs)are
4、supposedtoprovideuserofthesystemcanchooseforhimselfwhomheelectsasatisfactoryanswertoabovethreequestions.totrust,andwhomnot.MostcurrentlydeployedPKIs(withthenotableexcep-Aftercontrastingthepropertiesofweb-of-trustbasedtionofPGP,seesection3)usecentralizeda
5、ndhierarchicalPKIstothoseofhierarchicalPKIs,anintroductiontomodelsfortheirtrustcomputations,acceptingcertainwebsoftrustandtoquantitativetrustcalculationsisdrawbackscomingwiththem.Aninterestingandviablegiven.Thepaperconcludeswiththepresentationofanalterna
6、tesolutionis,forsomeapplications,thewebofefficient,sub-exponentialalgorithmthatallowsheuristictrust.Thiswell-knownmodelcanbeusedtoallowuserstocomputationsoftrustpathsinaweboftrust.derivetrustparameterswithoutinvolvingcertificationKeywords:WebofTrust,PKI,He
7、uristicTrustCalculation.authorities(CAs)orthelike.Theremainderofthispaperdiscussessomeissueswith1IntroductioncurrentPKIsolutions,givesanoverviewoverexistingwork,andthenintroducestheweboftrustasanalternatesolutiontothepeerauthenticationproblem.TheuseofThe
8、currentboomine-commercereliestoacertainquantitativetrustcalculationsisillustrated,andaviableextentonourabilitytocommunicatesecurely.Theslowheuristicstodofastcalculationsinaweboftrustisgiven.butsteadyprogressofIPSEC,theongo