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一个在线/离线签密方案的分析和改进 被引量：1

Cryptanalysis and improvement of an online/offline signcryption scheme
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摘要 对Liu等人提出的基于身份的在线/离线签密方案(LIU J K,BAEK J,ZHOU J.Online/offline identity-based signcryption re-visited.Inscrypt'10:Proceedings of the 6th International Conference on Information Security andCryptology.Berlin:Springer-Verlag,2010:90-102)进行了密码分析和改进。研究了Liu方案的不可伪造性,证明了Liu方案不能抵抗自适应选择消息和身份攻击,是可伪造的,并提出了对Liu方案的一个修改方案。修改方案克服了Liu方案中存在的安全漏洞,是一个安全的基于身份的在线/离线签密方案。 Liu＇s online/offline signcryption scheme（LIU J K,BAEK J,ZHOU J.Online/offline identity-based signcryption re-visited.Inscrypt＇10： Proceedings of the 6th International Conference on Information Security and Cryptology.Berlin： Springer-Verlag,2010：90-102） was cryptanalyzed and improved in this paper.By studying the unforgeability of Liu＇s scheme,this paper proved that Liu＇s scheme would be not unforgeable against adaptive chosen message and identity attack.To overcome the security problem in Liu＇s scheme,a modified scheme was proposed,and the modified scheme was proved to be a secure Identity-based online/offline signcryption scheme.
作者 李志敏 徐馨 李存华
机构地区 淮海工学院计算机工程学院
出处 《计算机应用》 CSCD 北大核心 2011年第11期2983-2985,共3页 journal of Computer Applications
基金 江苏省自然科学基金资助项目(BK20082140) 淮海工学院引进人才科研启动基金资助项目(KQ10121) 淮海工学院校内课题资助项目(KX10530)
关键词 签密 基于身份 双线性对 可证安全 随机预言模型 signcryption identity based bilinear pairing provably secure Random Oracle Model（ROM）
分类号 TP393.084 [自动化与计算机技术—计算机应用技术]
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参考文献11

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计算机应用
2011年 第11期

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