A secure and efficient key management scheme for wireless sensor networks

Wireless sensor networks consist of a huge number of battery-powered and low-cost devices, called (sensor) nodes. To guarantee secure communication in wireless sensor networks, secret keys should be securely established between sensor nodes. Recently, the random key management approaches have been proposed for pair-wise key establishment in sensor networks. However, all of them have the following problem : if sensor nodes are captured by an attacker, some pair-wise keys of non-captured nodes can be compromised. In this paper, we propose a key distribution scheme which improves the resilience against node capture and reduces communication cost.