无线传感器网络是一种新的应用型网络,被认为是未来改变世界的十大技术之首,有着广阔的应用前景。近年来,随着无线传感器网络受到越来越多的关注与应用,其安全问题也变得越来越重要。首先分析了无线传感器网络的特点,并在其基础上讨论了传感器网络的易受的安全威胁及安全需求,然后重点研究了SPINS安全协议,并针对其依赖基站的弱点提出了一种变换基站的改进方案。 Wireless sensor network is a new type of application network, which is considered as the first of the ten technologies to change the world in the future, and has a broad application prospect. In recent years, as more and more attention and application of wireless sensor networks, their security issues have become more and more important. First of all, the characteristics of wireless sensor networks are analyzed. On the basis of this, the vulnerable security threats and security requirements of sensor networks are discussed. Then, the SPINS security protocol is studied emphatically, and a base station improve proposals.