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1、TheTrustAnalysisPattern12MohamedE.Fayad,HaithamS.Hamza1ComputerEngineeringDept.–SanJoséStateUniversitySanJosé,CA95192-0180–USA2ComputerScience&Eng.Dept.-UniversityofNebraska-LincolnLincoln,NE68588-0115-USAm.fayad@sjsu.edu,hhamza@cse.unl.eduAbstract.Inthispaper,weproposetheTruststablean
2、alysispattern.Theobjectiveofthispatternistoprovideaconceptualmodelthatembodiesthemainaspectsofthetrustconcept.ThelevelofabstractionoftheTrustpatternmakesitapplicableforawidespectrumofapplications.“...trustisasocialgoodtobeprotectedjustasmuchastheairwebreatheorthewaterwedrink.Whenitisda
3、maged,thecommunityasawholesuffers,andwhenitisdestroyed,societiesfalterandcollapse"[Bok1978]pp.26and271.IntroductionTrustisaconceptthatplaysamajorroleinanyinteractionbetweenentities.Trusthasseveralapplicationsinbothsocialandbusinessactivities.Withthecurrentboomingofweb-basedapplications
4、,especially,e-commerce,e-business,ande-negotiation,trusthasbecomeamajorcomponentforthesuccessoftheseapplications.Therefore,thereisagreatneedforunderstandingthetrustconcept.Inaddition,trusthasbecomeanintegralcomponentinfuturenetworkinfrastructures.Forexample,inpeer-to-peernetworks,users
5、(ornodes)areallowedtoshareandexchangedata,anactivitythatnecessitatestheestablishmentoftrustbetweendifferentusers.Inaddition,theperformanceofsuchcollaborativenetworkwouldbegreatlydegradedifnoeffectivetrustmeasuresareimplemented.Severalstudieshaveconsidereddifferentdefinitionsoftrust.Wes
6、tateheretwodifferentdefinitionsoftrustfromtheliterature.In[GrandisonandSloman2000],trustwasdefinedas:“thefirmbeliefinthecompetenceofanentitytoactdependably,securely,andreliablywithinaspecifiedcontext”(assumingdependabilitycoversreliabilityandtimeliness).In[KiniandChoobineh1998],thetrus
7、thasbeendefinedinthefollowingway:“Trustinasystemisdefinedasanindividual’sbeliefinthecompetence,dependability,andsecurityofthesystemunderconditionsofrisk.”Thereisalargebodyofresearchthataddressesthetopicoftrustfromdifferentangles.Somestudiesviewtheproblemfromatheoreticalperspective,an
