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Tremendous advancements in embedded systems, sensors and wireless communications technology have made it possible to build Wireless Sensor Networks (WSNs) consisting of a large number of sensor nodes capable of sensing, processing, and communicating wirelessly in a distributed manner. Indeed, WSNs are being deployed for real-time monitoring of various mission critical applications such as border surveillance and perimeter control, airport and harbor security, environmental monitoring to alert natural disasters like hurricanes, tsunamis, and floods. Providing high information assurance (e.g., security, dependability, reliability) in WSNs is crucial, more so in unattended and hostile environments. Unfortunately, owing to resource limitations (e.g., CPU, memory, battery, wireless bandwidth), a sensor node can be easily overpowered by an adversary, resulting in completely revealed secrets and security breaches.
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