| Improved ID-Based Signature Scheme Solving Key Escrow |
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| 作者姓名： | 廖剑 戚英豪 黄佩伟 戎蒙括 李生红 |
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| 作者单位： | Dept. of Electronic Eng. Shanghai Jiaotong Univ. Shanghai 200030 China，Dept. of Electronic Eng. Shanghai Jiaotong Univ. Shanghai 200030 China，Dept. of Electronic Eng. Shanghai Jiaotong Univ. Shanghai 200030 China，Dept. of Electronic Eng. Shanghai Jiaotong Univ. Shanghai 200030 China，Dept. of Electronic Eng. Shanghai Jiaotong Univ. Shanghai 200030 China |
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| 基金项目： | NationalNaturalScienceFoundationofChina(No.60402019/F0102) |
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| 摘 要： | Introduction Inatraditionalpublickeycryptosystem(PKC),theassociationbetweenauser'sidentity andhispublickeyisobtainedthroughadigitalcer-tificateissuedbyacertificationauthority(CA).TheCAchecksthecredentialsofauserbeforeis-suingacertificatetohim.Tosimplifythecertifi-catemanagementprocess,Shamir1]introducedthe conceptofID-basedcryptosystemin1984,which allowedforauser'sidentityinformationsuchas hisname,IPaddress,telephonenumber,email address,etc.toserveashispublickey.Sucha publickeyisclearlyb…
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| 关 键 词： | 密码技术 符号 签名方法 解决方法 |
| 文章编号： | 1007-1172（2006）02-0121-06 |
| 收稿时间： | 2005-09-26 |
Improved ID-Based Signature Scheme Solving Key Escrow |
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| LIAO Jian,QI Ying-hao,HUANG Pei-wei,RONG Men-tian,LI Sheng-hong.Improved ID-Based Signature Scheme Solving Key Escrow[J].Journal of Shanghai Jiaotong university,2006,11(2):121-126. |
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| Authors: | LIAO Jian QI Ying-hao HUANG Pei-wei RONG Men-tian LI Sheng-hong |
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| Abstract: | Key escrow is an inherent disadvantage for traditional ID-based cryptosystem, i.e., the dishonest private key generator (PKG) can forge the signature of any user, meanwhile, the user can deny the signature actually signed by him/herself. To avoid the keyescrow problem, an ID-based signature scheme was presented without trusted PKG. The exact proof of security was presented to demonstrate that our scheme is secure against existential forgery on adaptively chosen message and ID attacks assuming the complexity of computational Diffie-Hellman (CDH) problem. Compared with other signature schemes, the proposed scheme is more efficient. |
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| Keywords: | cryptography ID-based signature bilinear pairings key escrow trusted private key generator |
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