提出了基于不同口令认证的跨域组间密钥交换协议, 该协议将Zhiguo Wan 等人所提出的nPAKE+ 协议扩展到

了两个域, 实现了两个域中的客户组在域服务器的协助下, 建立域间共享的组会话密钥的过程, 并给出了安全分析和

执行效率的代价分析。-The proposed protocol ex tends Zhigou Wan et al. PAKE+ protocol from sing le realm to two realms. And it enables two groups in different realms to agree o n a common group session key　with the help of servers. We also gave the security analysis and computational costs for our protocol .