摘要： 基于口令的群密钥协商协议的目的是利用低熵的口令协商出高熵的会话密钥，并应用此会话密钥进行安全的通信，达到成员之间多方安全的要求。在Burmester 及 Desmedt协议的基础上，引入伪随机函数集和签名方案，提出一个标准模型下的可证安全的基于口令的协议，并对其进行安全性分析。

关键词: 口令, 标准模型, 群密钥协商, 可证安全

Abstract: The goal of password-based group key exchange is to establish a high entropy session key used for secure communication through a low entropy password, reach the multi-security requirement between members. In this paper, the protocol is based on the protocol of Burmester and Desmedt, through introducing pseudorandom ensemble and signature scheme. A provably secure password-based protocol under standard model is proposed, and its security is analysed.

Key words: password, standard model, group key exchange, provable security

中图分类号: 

• TP309.2