Key Dispensation Scheme for Wireless Sensor Network
B. Sundarraj · 2014
In Wireless sensor networks (WSNs), key management is one of the crucial aspects of security. We propose a probabilistic key pre-distribution scheme that guarantees a higher probability of sharing keys between nodes that are within the signal range.since sensor networks suffer from the resource constraints like limited memory space, key pre distribution scheme should require less memory space as possible while supporting strong security strength i.e high resilience against node capture. If two sensor nodes closely located each other have very low probability to be in active state at the same time, unnecessary key assignment can be happened since keys shared only between them.A key pre-distribution schemes that makes use of region based deployment knowledge. Constructs a set of clustered such that each cluster contains a small number of deployment regions, all of which are neighbors of each other. Every pair of neighboring deployment regions belongs to at least one cluster. Each cluster has its own distinct key space and it is from these cluster key spaces that nodes are assigned their keys. In this manner, we guarantee that nodes in neighboring regions share a key with given overlap probability. while nodes in non-neighboring regions do not share any keys.