无证书可公开验证聚合签密方案

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1、无证书可公开验证聚合签密方案　　文章编号:10019081(2013)07185803doi:10.11772/j.issn.10019081.2013.07.1858摘要：聚合签密的研究多以基于身份密码体制下提供机密性与认证性，提高验证的效率为目标，存在对证书管理以及密钥托管问题，因此需要设计新的聚合签密算法，在解决证书管理以及密钥托管问题的同时兼顾机密性与高效性。分析了当前主流的聚合签密算法及其发展，利用Zhang等(ZHANGL,ZHANGFT.Anewcertificatele

2、ssaggregatesignaturescheme.ComputerCommunications,2009,32(6)：1079-1085)方案，并考虑上述需求，提出了一种新的无证书的聚合签密方案。方案基于双线性DiffieHellman(BDH)和计算性DiffieHellman(CDH)问题，证明了方案的机密性和不可伪造性。实验结果表明，所提方案在聚合解签密运算量上减少了3ne－(n+2)p。与其他方案持平或降低；同时，新的方案还满足了可公开验证性，消除了公钥证书的使用，并且解决了基于身份

3、密码体制中的密钥托管问题。关键词：聚合签密；无证书；可公开验证；双线性对中图分类号：TP391;TN918.15文献标志码:A英文标题Certificatelessaggregatesigncryptionschemewithpublicverifiability英文作者名ZHANGXuefeng1*,WEILixian1,2,WANGXuan1,2英文地址(1.KeyLaboratoryofNetworkandInformationSecurityunderChines

4、eArmedPoliceForce,EngineeringCollegeofArmedPoliceForce,XianShaanxi710086,China;2.InstituteofInformationSecurity,EngineeringCollegeofChineseArmedPoliceForce,XianShaanxi710086,China英文摘要)Abstract:Theresearchonaggregatesigncryptionismostlybasedonident

5、itybasedencryptiontoprovideconfidentialityandauthentication,thusimprovingefficiency.Butaggregatesigncryptionhastheproblemincertificatemanagementandkeyescrow.Therefore,itneedstodesignnewaggregate5signcryptionschemes,whichnotonlysolvetheproblemofcertifica

6、temanagementandkeyescrow,butalsoguaranteetheconfidentialityandauthenticationofthescheme.Thispaperanalyzedthemainstreamaggregatesigncryptionschemesandtheirdevelopment.CombinedwiththeschemeofZhangetal.(ZHANGL,ZHANGFT.Anewcertificatelessaggregatesignature

7、scheme.ComputerCommunications,2009,32(6)：1079-1085)andtheneedsmentionedabove,thisarticledesignedacertificatelessaggregatesigncryptionscheme,andproveditsconfidentialityandunforgeabilitybasedontheBilinearDiffieHellman(BDH)problemandComputationalDiffieHel

8、lman(CDH)problem.Theexperimentalresultsshowthattheproposedschemeismoreefficientandtheamountofcomputationisequalorlowerincomparisonwiththeotherschemesby3ne-(n+2)p.Whatsmore,thenewschemeispubliclyverifiable,anditelimi