Minimization of energy consumption is critical for wireless IoT networks, in which sensor device nodes are resource-constrained and battery-powered, and communicate over unstable and unreliable radio links. A denial-of-sleep attack is a kind of denial-of-service attacks particular to wireless networks. It forces each node to keep their radio on, exhausts battery-powered devices, and consequently impairs availability of the network. The “Wake-up Token” (WuT) method is the most lightweight countermeasure against the denial-of-sleep attack. Its most promising improvement, SWARD (Secure WAke-up RaDio), was proposed; however, discussed only on a single-hop network. We applied it to multi-hop networks, GPSR and AODV, and examined the feasibility and performance of SWARD.
Keywords: AODV, GPSR, denial-of-sleep attack, wake-up call, wake-up token
