中文摘要：

随着无线传感器网络（WSN）理论和技术的发展，基于位置的应用（如基于位置的存取控制）已成为一种新的需求．然而已有的定位系统没有考虑到特定环境下攻击者利用放大器、定向天线或者通过被俘荻节点进行攻击的情形．本文利用超宽带技术（UWB）的优点，提出一种基于UWB和移动信标点的安全定位方法，更适合WSN中基于位置估计的应用需求．该方法首先定位出网络中用户节点的位置，然后进行位置验证，去除恶意信标点，最终实现准确定位．通过实验表明了该方法的有效性．

英文摘要：

Development of theory and technology of wireless sensor network（WSN） has made it possible to satisfy the new demand for location-based applications such as location-based access control. However, most of existing techniques do not take into account the security of location estimate of the access nodes whose goal would be to try to confuse the localization system by amplifiers and antennas or compromised anchors in some particular application environment. In consideration of the advantages Of UWB, this paper proposes a secure localization scheme for sensor networks based on UWB and mobile anchors, which is more suitable for location- based applications. This scheme localizes the user node in WSN at first, and then makes security verification of the location estimate. At last it picks out some malicious anchors to achieve accurate positioning. The experimental results demonstrate the effectiveness of the proposed method.