Secure access control protocol for WSNs with inter-network roaming

Wireless Sensor Networks (WSNs) open up wide range of possibilities for new applications such as monitoring and surveillance applications due to their low-cost and easy deployability. However, the limitations in terms of limited CPU processing power, memory, and battery, bring in a great deal of challenge to provide adequate security for on-board data storage and communication. While many works on secure key establishment exist, most of them assume that sensor nodes are either in fixed location or move within a single WSN. As WSN technology develops, there are more applications coming up which require a sensor node to roam across multiple WSNs. This paper presents a roaming protocol that provides security for the on-board sensory data (in terms of data access) while allowing a sensor node to move across multiple WSNs.