WSN中一种改进的密钥管理方案研究

密钥管理作为传感器网络安全中最为基本的环节,在认证和加密过程中起着重要作用。针对无线传感器网络(Wireless Sensor Network,WSN)的通信密钥易被破解的缺点以及为建立安全信道而增加密钥会造成网络的连通率低的问题,提出了一种改进的无线传感器网络密钥管理方案,通过定位算法得到网络中的坐标,利用所得到的位置信息对所存储的密钥空间进行优化,可以增大2个邻居节点拥有相同密钥空间的概率。实验结果表明:该方法占用较小密钥存储空间,能明显改善网络连通性和网络的安全性等性能,提高安全性。

Research on Key Management Algorithm Based on Q-composite in Wireless Sensor Networks

As the most fundamental part in sensor network security, the key management plays an important role during the authentication and encryption. The communication key of wireless sensor networks is easily attacked and the key adding for secure channel setup will lead to low connectivity. Aiming at such problems, this paper proposes a new key management scheme of wireless sensor network based on q-composite random model. In this scheme, the network coordinates are obtained by using location algorithm, and the stored key space is optimized by the obtained position information to improve the probability that two neighbor nodes in the network have same key space. The experiment results show that compared to the traditional scheme, this algorithm can occupy less key storage space, and improve effectively network connectivity and security.