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《云計(jì)算環(huán)境下基于評(píng)價(jià)可信度的動(dòng)態(tài)信任評(píng)估模型_張琳_饒凱莉_王汝傳》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫(kù)。
1、第34卷第Z1期通信學(xué)報(bào)Vol.34No.Z12013年8月JournalonCommunicationsAugust2013doi:10.3969/j.issn.1000-436x.2013.z1.005云計(jì)算環(huán)境下基于評(píng)價(jià)可信度的動(dòng)態(tài)信任評(píng)估模型1,2,311,2,3張琳,饒凱莉,王汝傳(1.南京郵電大學(xué)計(jì)算機(jī)學(xué)院,江蘇南京210003;2.江蘇省無(wú)線傳感網(wǎng)高技術(shù)研究重點(diǎn)實(shí)驗(yàn)室,江蘇南京210003;3.南京郵電大學(xué)寬帶無(wú)線通信與傳感網(wǎng)技術(shù)教育部重點(diǎn)實(shí)驗(yàn)室,江蘇南京210003)摘要:針對(duì)云用戶如何選取可信的云服務(wù)提供商問(wèn)題,提出了
2、基于評(píng)價(jià)可信度的動(dòng)態(tài)信任評(píng)估模型。該模型將云服務(wù)提供商的服務(wù)能力和云用戶所需求的服務(wù)能力分別劃分等級(jí),有效地解決了云服務(wù)提供商服務(wù)能力動(dòng)態(tài)變化對(duì)模型存在的潛在破壞問(wèn)題。建立了信任度隨時(shí)間窗變化的動(dòng)態(tài)信任機(jī)制,在計(jì)算信譽(yù)度時(shí),將用戶的評(píng)價(jià)可信度作為其評(píng)價(jià)證據(jù)的可信權(quán)重,通過(guò)引入評(píng)價(jià)可信度和評(píng)價(jià)相似度提高了計(jì)算推薦行為可信度的準(zhǔn)確率。仿真結(jié)果表明,該模型的評(píng)估結(jié)果更貼近云服務(wù)提供商的真實(shí)信任度,同時(shí)能有效抵御惡意云用戶的攻擊。關(guān)鍵詞:服務(wù)等級(jí);時(shí)間窗;評(píng)價(jià)可信度;推薦可信度中圖分類號(hào):TP393文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1000-436X(2
3、013)Z1-0031-07Dynamictrustevaluationmodelbasedonevaluationcredibilityincloudcomputing1,2,311,2,3ZHANGLin,RAOKai-li,WANGRu-chuan(1.CollegeofComputer,NanjingUniversityofPostsandTelecommunications,Nanjing210003,China;2.HighTechnologyResearchKeyLaboratoryforWirelessSensorNet
4、worksofJiangsuProvince,Nanjing210003,China;3.KeyLabofBroadbandWirelessCommunicationandSensorNetworkTechnology,MinistryofEducation,NanjingUniversityofPostsandTelecommunications,Nanjing210003,China)Abstract:Consideringtheproblemthatclouduserswillselectatrustedcloudservicep
5、rovider,adynamictrustevalua-tionmodelbasedonevaluationcredibilitywasproposed.Thismodeldividestheabilityofcloudserviceproviderandtheoneoftheuser’srequirmentsintomanyranks,whichcaneffectivelysolvethepotentialdamagecausedbythedynamicchangeintheabilityofcloudserviceproviders
6、.Adynamicmechanismoftrustchangingabouttime-windowwasestab-lished.Duringthecalculationofcredibility,theuser’sevaluationcredibilitywasusedasthetrustweight.Thecalculatingaccuracyoftherecommendedbehaviorcredibilitywasimprovedbyintroducingtheevaluationcredibilityandevaluation
7、similarity.Simulationresultsshowthatthemodelresultsareclosertothecloudserviceprovider'sactualtrustvalue,andcanresisttheattackofmaliciousclouduserseffectively.Keywords:servicerank;time-window;evaluationcredibility;recommendationcredibility收稿日期:2013-06-26基金項(xiàng)目:國(guó)家自然科學(xué)基金資助項(xiàng)目(
8、61170065,61171053,61203217,61103195,61201163,61202354);江蘇省自然科學(xué)基金資助項(xiàng)目(BK2011755,BK2011072,BK2012436);江蘇省