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Denial of Service (DoS) attacks constitute a major security threat to today'sInternet. This challenge is especially pertinent to the Internet of Things(IoT) as devices have less computing power, memory and security mechanisms tomitigate DoS attacks. This paper presents a model that mimics the uniquecharacteristics of a network of IoT devices, including components of the systemimplementing `Crypto Puzzles' - a DoS mitigation technique. We created animitation of a DoS attack on the system, and conducted a quantitative analysisto simulate the impact such an attack may potentially exert upon the system,assessing the trade off between security and throughput in the IoT system. Wemodel this through stochastic model checking in PRISM and provide evidence thatsupports this as a valuable method to compare the efficiency of differentimplementations of IoT systems, exemplified by a case study.

Quantitative Analysis of DoS Attacks and Client Puzzles in IoT Systems