| Secure mediated certificateless signature scheme |
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| 作者姓名： | YANG Chen MA Wen-ping WANG Xin-mei Ministry of Education Key Laboratory of Computer Networks and Information Security Xidian University Xi’an China |
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| 作者单位： | YANG Chen MA Wen-ping，WANG Xin-mei Ministry of Education Key Laboratory of Computer Networks and Information Security，Xidian University，Xi’an 710071，China |
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| 基金项目： | 教育部跨世纪优秀人才培养计划;国家自然科学基金 |
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| 摘 要： | Ju et al. proposed a certificateless signature scheme with instantaneous revocation by introducing security mediator (SEM) mechanism. This article presents a detailed cryptoanalysis of this scheme and shows that, in their proposed scheme, once a valid signature has been produced, the signer can recover his private key information and the instantaneous revocation property will be damaged. Furthermore, an improved mediated signature scheme, which can eliminate these disadvantages, is proposed, and security proof of the improved scheme under elliptic curve factorization problem (ECFP) assumption and bilinear computational diffie-hellman problem (BCDH) assumption is also proposed.
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| 收稿时间： | 28 September 2006 |
Secure mediated certificateless signature scheme |
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| YANG Chen,MA Wen-ping,WANG Xin-mei.Secure mediated certificateless signature scheme[J].The Journal of China Universities of Posts and Telecommunications,2007,14(2):75-78. |
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| Authors: | YANG Chen MA Wen-ping WANG Xin-mei |
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| Affiliation: | Ministry of Education Key Laboratory of Computer Networks and Information Security, Xidian University, Xi''an 710071, China |
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| Abstract: | Ju et al. proposed a certificateless signature scheme with instantaneous revocation by introducing security mediator (SEM) mechanism. This article presents a detailed cryptoanalysis of this scheme and shows that, in their proposed scheme, once a valid signature has been produced, the signer can recover his private key information and the instantaneous revocation property will be damaged. Furthermore, an improved mediated signature scheme, which can eliminate these disadvantages, is proposed, and security proof of the improved scheme under elliptic curve factorization problem (ECFP) assumption and bilinear computational diffie-hellman problem (BCDH) assumption is also proposed. |
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| Keywords: | certificateless signature scheme bilinear pairing security mediator |
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