无线传感器网络需要安全组通信的支持，尤其是军事、紧急救灾等场合。
Many emerging Wireless Sensor Networks applications especial for emergency and military situations depend upon secure group communications.
分簇算法是无线传感器网络中实施分层路由所采用的重要方法，尤其是传感器节点受到能量和带宽的严重制约。
Clustering algorithms are the most important method for hierarchy routing in wireless sensor network; especially the sensor nodes are limited by poor energy and bandwidth.
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