摘要： 提出一种新的基于身份的群认证密钥协商协议，并基于决策双线性Diffie-Hellman问题的难解性，在标准模型下对协议的安全性进行形式化证明。该协议考虑群会话中成员的动态性问题，从而解决群密钥协商中成员的流动问题。安全性性能分析结果表明，该协议用较低的计算量实现了参与者的安全会话密钥协商。

关键词: 密码学, 密钥协商, 标准模型, 基于身份的密码学, 身份认证, 决策双线性Diffie-Hellman问题

Abstract: This paper proposes a new ID-based group authenticated key agreement protocol with a formal security proof in standard model based on the Decision of Bilinear Diffie-Hellman(DBDH) assumption. This protocol considers the dynamic property for group members completely which can solve the problem that the dynamitic of the members. Security performance analysis shows that the protocol can realize the secure key agreement with low computational cost.

Key words: cryptography, key agreement, standard model, ID-based cryptography, identity authentication Decision of Bilinear Diffie-Hellman (DBDH) problem

中图分类号: 

• TP309