可追踪匿名签名及在电子商务中的应用

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1、优于已有方案。所给出的公平电子支付协议，无需第三方参与。7提出了一个新的可转换的用户指定验证者部分盲签名方案。同Huang等方案比，签名长度缩短了25％，计算量减少了36％。关键词：信息安全数字签名电子商务群签名群盲签名部分盲签名指定验证者签名电子现金电子拍卖电子支付AbstractWiththedevelopmentofintcmct，electroniccommerceisbeingusedwidely,andtheimportanceofinformationsecurityiSpaidmuchmoreattention．Asoneofthemaintechniquesrealiz

2、inginformationsecurity,digitalsignatureisappliedwidelytoelectroniccommerce．Inordertoprotecttheprivacyoftheusers，anonymoussignaturesareusedusually．Generally,anonymoussignaturesincludeunconditionallyanonymoussignaturesandtraceableanonymoussignatures．Theunconditionalanonymityofunconditionallyanonymo

3、ussignaturesmaybeabusedandmaybeappliedtocrimes，whilethetraceableanonymoussignaturesCanavoidthese．Thisthesismainly南cusedontheresearchoftraceableanonymoussignaturesincludinggroupsignature，groupblindsignature，partiallyblindsignatureandconvertibleuserdesignatingconfil-merpartiallyblindsignature．Also，

4、thisthesisincludestheapplicationsofthesetraceablesignaturestosomeimportantareasofelectroniccommerce,suchaselectronicauction，electroniccash，andelectronicexchange。Themaincontributionsalesummarizedasfollows。1．Anefficientprotocolthatprovesacommittednumberlyinginaspecificintervalisproposed．Theexisting

5、protocolsthatprovesacommittednumberxlyinginaspecificinterval[a，b]mostlyprovethatintegerxisnolessthanaandthenrepeatthesamemethodtoprovethatbisnolessthanx。Whileusingtheproposedprotocolonlyonce，averifiercallcofivincethatthecommittednumberxisintheinterval[钆b]．2。AsimplemembershiprevocationmethodinACJT

6、groupsignatureschemeisgiven．First，theknowledgeproofofdivisibilityisgiven．Then，agroupmemberusesittoprovethatthepublickeyinhiscertificatedividesexactlythepublickeyproductissuedbythegroupmanager．Intheproposedrevocationmethod，thegroupmanageronlyneedsonedivisionandoneexponentiationwhenagroupmemberisde

7、leted，whilethesigningandverifyingprocedureareindependentofthenumberofcurrentgroupmembersandexcludedmembers，aswellastheoriginalgrouppublickeyandmembershipcertificatesneedn’tbechanged。3．AnimprovedVLRgroupsignatureschemei