We introduce the classic dynamic user authentication protocols in WSNs (wireless sensor network),and analyze its advantage and problem.We introduce a new WSNs gateway structure.Base on it, we propose an improved dynamic user authentication protocol.The analysis shows the improved protocol keeps the original characteristics of high efficiency and low consumption, and it enhances security and increases the user's convenience.%介绍了无线传感器网络中典型的动态用户认证协议,并指出了其优点和问题.在引入一种新的无线传感器网关结构的基础上提出了对动态用户认证协议的改进方案.分析表明:改进的协议保留了原协议高效、低耗的特点并加强了安全性和增加了用户便利性.
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