中文摘要：

在基于属性加密方案的基础上，提出一个基于属性的密钥协商协议。讨论基于属性的密钥协商协议的特性及可能的应用背景，其具有可实现模糊鉴别的特性，所实现的密钥策略为访问树结构。分析协议的安全属性并给出安全性证明，结果表明，与已有的协议相比，该协议可实现较复杂的访问结构，同时在标准模型下，基于判定双线形Diffie-Hellman假定证明了协议的安全性。

英文摘要：

This paper proposes a two-party key policy attribute-based key agreement protocol on the basis of attribute based encryption scheme. It discusses some properties and potential applications of key policy attribute based key agreement protocol with the characteristics of fuzzy identification, key policy is access tree structure. It analyzes the security attributes of the protocol and gives the rigorous proof of security. Results show that, comparing with previous protocols, the new protocol achieves more complex access structure and is proved secure in the standard model under the Decisional Bilinear Diffie-Hellman（DBDH） assumption.