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1、ISSN1000-9825,CODENRUXUEWE-mail:jos@iscas.ac.cnJournalofSoftware,Vol.18,No.10,October2007,pp.2551−2563http://www.jos.org.cnDOI:10.1360/jos182551Tel/Fax:+86-10-62562563©2007byJournalofSoftware.Allrightsreserved.∗一种P2P电子商务系统中基于声誉的信任机制+姜守旭,李建中(哈尔滨工业大学计算机科学与技术学院,黑龙江哈尔滨150001)AReputati
2、on-BasedTrustMechanismforP2PE-CommerceSystems+JIANGShou-Xu,LIJian-Zhong(SchoolofComputerScienceandTechnology,HarbinInstituteofTechnology,Harbin150001,China)+Correspondingauthor:Phn:+86-013936168008,Fax:+86-451-86415827,E-mail:jsx@hit.edu.cnJiangSX,LiJZ.Areputation-basedtrustmechan
3、ismforP2Pe-commercesystems.JournalofSoftware,2007,18(10):2551−2563.http://www.jos.org.cn/1000-9825/18/2551.htmAbstract:Theexistenceofmalicioususerscoulddamagethecorrectnessandavailabilityofthepeer-to-peer(P2P)e-commercesystems.Reputation-Basedtrustmechanismscanrecognizethesemalici
4、ouspeersbycomputingthetrustworthinessofthepeers.Thevalidityofareputation-basedtrustmechanismreliesonsomewell-chosentrustfactors,whichdirectlyinfluencethecomputationoftrustvalue,theaccuracyofthetrustmechanism,andtheresistibilityofthetrustmechanismtovariousattacks.However,thereareso
5、meproblemsintheabovethreeaspectsofexistingreputation-basedtrustmechanismsinP2Penvironments,suchastheselectionoftrustfactors.Thispaperpresentsanovelreputation-basedtrustmechanismforP2Pe-commercesystems.Inthismechanism,apeerhastwokindsofreputations,namelylocalreputationsandglobalrep
6、utations.Thelocalreputationofapeerrelativetoanotherpeeriscalculatedintermsofthereferencepeer’sratingofthetransactionbetweenthetwopeers,whereastheglobalreputationiscomputedbasedonallpeers’ratingofthetransactionbetweenthem.Tocomputethelocalandglobalreputationspreciselyandtoobtainstr
7、ongerresistibilitytoattacksaswell,manycomprehensivefactorsincomputingtrustvalueareintroducedinthemechanism.Toestimatethevalidityoftheratinggivenbypeers,aqualitymodelandacomputationalmethodarealsoemployedtoevaluatetheobjectivityandthecredibilityoftherating,respectively.Tocomputethe
8、trustvalueofapeer,theconceptofbel
