Abstract: A new key management scheme based on the matrix theory and the deployment knowledge is proposed. The methods of key distribution and nodes deployment are given, the process of key establishment is discussed in detail, the way of key management when the new nodes come in or the old nodes come out is introduced. Proof analysis shows that the complexity of computing and the overhead of communication of the scheme are reduced to a constant level, it has perfect security and scalability.

Key words: Wireless Sensor Network(WSN), matrix theory, deployment knowledge, key management, security factor

摘要： 利用传感器节点部署后的地理知识信息，并结合矩阵理论提出一种新的密钥管理方案。给出密钥预分配方法和节点部署方法，描述密钥建立过程，介绍当新节点加入时以及旧节点离开时的密钥管理方法。论证分析表明，在该方案中节点的计算复杂度及节点之间的通信开销被降低到常量级，具有较好的可扩展性和安全性。

关键词: 无线传感器网络, 矩阵理论, 部署知识, 密钥管理, 安全因子

CLC Number: 

• TP393.08