Abstract: The authors present an identity-based authenticated key agreement protocol without bilinear pairing in multiple PKG environments. Reduced to the standard computational Diffie-Hellman (CDH) assumption in the random oracle model, the protocol security is given a complete proof based on the security of proposed ID-based exponential challenge-response (XCR) signature scheme and dual challenge-response (DCR) signature scheme. Compared with previous identity-based authenticated key agreement protocols, the new protocol shows better performances.

Key words: ID-based, authenticated key agreement, multiple PKG environments, bilinear pairing

摘要： 提出一种多PKG环境下无双线性对的基于身份AKA协议, 且在随机预言模型下, 将协议的安全性证明规约到标准的计算性CDH假设。提出了相应的基于身份XCR与DCR签名体制, 通过对两处体制进行安全性证明, 实现对新协议的安全性证明。通过与已有协议的相关性能比较体现了新协议的优点。

关键词: 基于身份, 认证密钥协商, 多PKG环境, 双线性对