A Hierarchical Authentication Scheme for the Different Radio Ranges Sensor Networks

Current secure authentication scheme is typically assumed to be the same communication ranges of all nodes in WSN. Howerver, due to the influence of environment and dynamic topology, the communication radius of all nodes are no strictly consistent, which may cause different neighbor number and redundant neighbors for one central node. As a result, energy consumption of each node is unbalanced and inefficient. In this paper, we propose a secure mutihop authentication scheme, neighbor nodes are grouped according to their communication range using torus topology. Subsequently, every node is verified with keys derived from multiple one-way hash sub-chains corresponding to the level, which is picked with low probability between two or more sensors during key pre-distribution phase, the proposed scheme prevents malicious node from man-in-middle attacks and resilience against node compromised. Moreover, the distributed strategy and with fewer neighbors to their central node greatly alleviates communication overhead and extends the network lifetime resulting from equilibrium energy consumption.