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Trustworthiness in wireless sensor and actuator networks: towards low-complexity reliability and security

Our research aims to address the challenging trustworthiness issues in wireless sensor and actuator networks (WSANs). As trustworthiness requires data to be transmitted among actuators and sensors with desired 'reliability' and 'security', we propose a low-complexity transmission reliability scheme that is based on local wireless path repair and hop-to-hop retransmission. Since WSANs have specific network constraints and data transmission requirements compared to general ad hoc networks and other wireless/wired networks, the security issues need to be tackled accordingly. We propose to seamlessly integrate WASN security with a promising routing architecture that is scalable and energy-efficient. In this paper, we also develop two-level re-keying/re-routing schemes that can not only adapt to a dynamic network topology but also securely update keys for each data transmission session.