SSGK: Secure Self-Healing Group Keying for Wireless Sensor Networks

Self-healing key distribution enables users in a large and dynamic group to establish session keys for secure group communication over an unreliable network. The main property of self-healing key distribution is that the users are capable of recovering lost session keys on their own, without requesting additional transmissions from the group manager. In this paper, we propose a self-healing key distribution scheme, called Secure Self-healing Group Keying, for wireless sensor networks. Under an appropriately defined security model, we show that our scheme outperforms previous research work in terms of storage and communication overhead.