Because sensor nodes are often deposed in hostile areas, the keys and security algorithms can be understood by the enemies.So the key management has became the focus of research.

• 摘要传感器节点往往被部署在可被捕获的敌对区域，其中的密钥及安全算法可被敌人知晓，所以如何进行密钥管理成为了研究焦点。