A key setup mechanism utilizing dual key strings for secure sensor communication

For secure sensor communication, pairwise key establishment between sensor nodes is essential. In this paper, we cluster the network field in rectangular shape and preassign two different kinds of key information for each sensor according to its expected location. We utilize overlapped key string pool concept for our network architecture and every node uses the part of sub-strings for setting up pairwise keys with neighboring nodes in its own cluster and from different clusters according to respective position. Our proposal decreases the memory requirement and increases security level efficiently.