Dynamic Key Management Scheme for Wireless Sensor Networks Based on Cluster
Xu He · Journal of Nanjing University of Posts and Telecommunications · 2012
To tackle the problems of excessive computation overhead and storage space and inflexible management adhering to the existing wireless sensor networks,a cluster based dynamic key management scheme is proposed based on the clustered network topology and virtual grid technology.Within the scheme,the communication between the cluster head and the active nodes is conducted using pre-distribution strategy of the head key,and the communication between cluster heads is conducted using,pair-wise key based on the combination of Blom matrix and random numbers.The scheme can dynamically update the key when the active nodes or cluster heads are captured or their energy is used up.Compared with the existing schemes,the proposed scheme can dynamically update the key and is of higher security and good scalability.