基于MSP秘密共享的（t，n）門限群簽名方案.pdf

1、廈門大學碩士學位論文基于MSP秘密共享的（t，n）門限群簽名方案姓名：全俊杰申請學位級別：碩士專業(yè)：基礎數(shù)學指導教師：曾吉文20070501AbstractDigitalSignature，oneoftheimportantapplicationsofpublickeycryptosystem，canbeusedtoptotectdataintegrityandauthenticatetheidentityofthesenderofam

2、essageItplaysanimportantroleintheelectronictransactionsPublicKeyCryptography(PKC)isgainingaconsiderableattentionbecauseitcanassurethesecurityrequirementsofmanyapplicationsanditpaveabroadpropectforthedigitalsignaturedevel

3、opmentGroupsignature，introducedbyDChaumandEVanHeyst[1]inl991，allowsanymemberofagrouptosignonbehalfofthegroupHowever，theidentityofthesigneriskeptsecretAgroupsignaturewithsecrectsharingisthethresholdgroupsignature[2]Itisan

4、organiccombinationofsecretsharingandgroupsignature，andsomemembersofthegroupcansigndocumentsonbehalfofthegroup，soitincreasethesecurityofthesystemInthispaper，anew(tn)thresholdgroupsignatureschemeisproposedbasedonMontonespa

5、nprograms[5]Whentheschemeisbuilt，asetofmemberswhosenumberisoverthethresholdcanmakeavalidgroupsignatureWhenthedisputeoccurs，onlytheauthoritycandeterminewhoistherealsignerTheschemecanwithstandconspiracyattacksThesecurityof