标准模型下增强的基于身份的认证密钥协商协议

密钥抽取是密钥协商协议的一个重要环节，该文指出2007年王圣宝等人提出的标准模型下基于身份的认证密钥协商协议在该环节存在重要缺陷；并根据密钥抽取函数的不同功能，将标准模型下密钥抽取细化为随机提取和密钥抽取两个步骤，并基于Kiltz等人提出的基于身份的加密方案，设计了一个新的认证密钥协商协议IBAKE，其安全性证明规约更严谨，协议执行效率更高。

Enhanced Identity-Based Authenticated Key Agreement Protocols in the Standard Model

Key derivation is an essential part of key agreement protocol. In 2007, Wang et al. presented an identity-based authenticated key agreement protocol in standard model. However there exists serious fault in key derivation of the protocol. In this paper, key derivation phase in standard model is subdivided into randomness extraction and key derivation. And a new authenticated key agreement protocol is devised using identity-based encryption scheme introduced by Kiltz et al, which has a tightly security reduction and performance efficiency.