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Cryptanalysis and improvement of a certificateless encryption scheme in the standard model 被引量：1

Cryptanalysis and improvement of a certificateless encryption scheme in the standard model
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摘要 Certificateless public key cryptography elimi- nates inherent key escrow problem in identity-based cryptog- raphy, and does not yet requires certificates as in the tradi- tional public key infrastructure. In this paper, we give crypt- analysis to Hwang et al.＇s certificateless encryption scheme which is the first concrete certificateless encryption scheme that can be proved to be secure against ＂malicious-but- passive＂ key generation center （KGC） attack in the stan- dard model. Their scheme is proved to be insecure even in a weaker security model called ＂honest-but-curious＂ KGC at- tack model. We then propose an improved scheme which is really secure against ＂malicious-but-passive＂ KGC attack in the standard model. Certificateless public key cryptography elimi- nates inherent key escrow problem in identity-based cryptog- raphy, and does not yet requires certificates as in the tradi- tional public key infrastructure. In this paper, we give crypt- analysis to Hwang et al.＇s certificateless encryption scheme which is the first concrete certificateless encryption scheme that can be proved to be secure against ＂malicious-but- passive＂ key generation center （KGC） attack in the stan- dard model. Their scheme is proved to be insecure even in a weaker security model called ＂honest-but-curious＂ KGC at- tack model. We then propose an improved scheme which is really secure against ＂malicious-but-passive＂ KGC attack in the standard model.
作者 Lin CHENG Qiaoyan WEN Zhengping JIN Hua ZHANG
机构地区 State Key Laboratory of Networking and Switch Technology
出处 《Frontiers of Computer Science》 SCIE EI CSCD 2014年第1期163-173,共11页 中国计算机科学前沿（英文版）
关键词 certificateless public key cryptography stan-dard model provable security certificateless public key cryptography, stan-dard model, provable security
分类号 TP311.52 [自动化与计算机技术—计算机软件与理论] O572.2 [理学—粒子物理与原子核物理]
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  • 2Huang Q, Wong D S. Generic certificateless encryption in the standard model. In Proc. IWSEC 2007, Nara, Japan, Oct. 29-31, 2007, pp.278-291.
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Frontiers of Computer Science
2014年 第1期

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