KALwEN+: Practical Key Management Schemes for Gossip-Based Wireless Medical Sensor Networks
The constrained resources of sensors restrict the design of a key management scheme for Wireless Sensor Networks (WSNs). In this paper, the authors first formalize the security model of ALwEN, which is a gossip-based Wireless Medical Sensor Network (WMSN) for ambient assisted living. Their security model considers the node capture, the gossip-based network and the revocation problems, which should be valuable for ALwEN-like applications. Based on Shamir's secret sharing technique, they then propose two key management schemes for ALwEN, namely the KALwEN+ schemes, which are proven with the security properties defined in the security model. The KALwEN+ schemes not only fit ALwEN, but also can be tailored to other scalable wireless sensor networks based on gossiping.