密码分析和基于RSA多重数字签名方案的改进-毕业论文外文翻译

《密码分析和基于RSA多重数字签名方案的改进-毕业论文外文翻译》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、英文资料及翻译英文资料：(ItcomesfromCarltonR.Davis.IPSEC:SecuringVPNS.北京：清华大学出版社，2002)CryptanalysisandImprovementofDigitalMultisignatureSchemeBasedonRSASULi(粟　栗)CUIGuohua(崔国华)CHENJing(陈　晶)　YUANJun(袁　隽)SchoolofComputerScienceandTechnology,HuazhongUniversityofScienceandTechnology

2、,Wuhan430074,ChinaAbstractZhangeta.lproposedasequentialmultisignatureschemebasedonRSA.Theschemehasadvantagesoflowcomputationandcommunicationcosts,andsoon.However,wefindaproblemintheirschemethattheverifiercannotdistinguishwhetherthemulti-signatureissignedbyallthesign

3、ersofthegrouporonlybythelastsigner.Thus,anysinglesignaturecreatedbythelastsignercanbeusedasamultisignaturecreatedbythewholegroupmembers.Thispaperproposesanimprovedschemethatcanovercomethedefect.Inthenewscheme,theidentitymessagesofallthesignersareaddedinthemultisigna

4、tureandusedinverificationphase,sothattheverifiercanknowthesignatureisgeneratedbywhichsigners.Performanceanalysisshowsthattheproposedschemecostslesscomputationthantheoriginalschemeinbothsignatureandverificationphases.Furthermore,eachpartialsignatureisbasedonthesigner

5、’sidentitycertificate,whichmakestheschememoresecure.Keywords:　Digitalmultisignature;Sequentialmultisignature;RSAcryptosystem;CryptanalysisIntroductionMultisignatureisajointsignaturegeneratedbyagroupofsigners.Thegrouphasasecuritypolicythatrequiresamultisignaturetobes

6、ignedbyallgroupmemberswiththeknowledgeofmultipleprivatekeys.Digitalmultisignaturesshouldhaveseveralbasicproperties[1]:(1)Multisignaturesaregeneratedbymultiplegroupmemberswiththeknowledgeofmultipleprivatekeys.(2)Multisignaturescanbeverifiedeasilybyusingthegrouppublic

7、keywithoutknowingeachsignerspublickey.(3)Itiscomputationallyinfeasibletogeneratethegroupsignaturewithoutthecooperationofallgroupmembers.In2003,Zhangeta.l[2]proposedasequentialmultisignatureschemebasedonRSA,inwhichallthesignersuseacommonmodulus.Theschemehastheadvanta

8、gesoflowcomputationandcommunicationcosts,andcanresistforgeryandcoalitionattacks.Thedifficultyofbreakingthesystemisequivalenttothatoffactor