Computer Engineering and Applications ›› 2011, Vol. 47 ›› Issue (15): 119-122.
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CAI Yantao
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蔡艳桃
Abstract: Identity-based cryptography is a rapidly emerging approach to public-key cryptography that public keys can be arbitrary identifiers.Analyzing the existing identity-based authenticated encryption scheme which a weakness is presented—a recipient can pretend other users to send messages to him,that is,users can’t authenticate whether a message’s sender is true,and combining bilinear pair,an improvement of that scheme is proposed,whose security is based on the bilinear Diffie-Hellman problem.The security and efficent are analyzed.The result shows that the scheme not only overcomes the mentioned weakness,but also keeps the excellence of that scheme.
Key words: authenticated encryption, identity-based encryption, hybrid encryption, bilinear pair
摘要: 基于身份加密是一种以用户的身份标识符作为公钥的加密体制。通过分析现有的基于身份的认证加密方案,针对其中存在的用户不能防止自身假冒其他用户发送消息给自己,即不能认证信息主体的真实性的安全隐患,结合双线性映射的特性,提出了改进方案。新方案的安全性是基于双线性Diffie-Hellman问题的,并对改进方案的安全性和效率进行了分析。结果表明,改进方案保持了原方案优点的同时,消除了隐患,进一步提高了安全性。
关键词: 认证加密, 基于身份加密, 混合加密, 双线性对
CAI Yantao. Improvement of identity-based authenticated encryption scheme[J]. Computer Engineering and Applications, 2011, 47(15): 119-122.
蔡艳桃. 一种基于身份的认证加密方案的改进[J]. 计算机工程与应用, 2011, 47(15): 119-122.
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http://cea.ceaj.org/EN/Y2011/V47/I15/119