Location-aware key establishment in wireless sensor networks
Fang Liu, José Rivera-Mejia, Xiuzhen Cheng · 2006
Due to its efficiency, symmetric key cryptography is very attractive in sensor networks. A number of pairwise key pre-distribution protocols have been proposed, but the scalability is often constrained by the conflict between the desired probability of sharing keys between two nodes and the resilience against node capture attack under a given storage capacity for key-related information within each sensor. In this paper, we propose LKE, a self-configuring scheme for location-aware key establishment that targets resource-constrained sensor networks. In LKE, location information is employed for a deterministic key space generation and keying information distribution. LKE exhibits "perfect" security in against node capture attack and achieves high connectivity (close to 1) in the induced key-sharing graph at the expense of a small amount of memory in worker sensors. LKE is a pure in-situ key establishment scheme, which scales well to very large sensor networks.