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The emergence of IoT poses new challenges towards solutions for authenticating numerous very heterogeneous IoT devices to their respective trust domains. Using passwords or pre-defined keys have drawbacks that limit their use in IoT scenarios. Recent works propose to use contextual information about ambient physical properties of devices' surroundings as a shared secret to mutually authenticate devices that are co-located, e.g., the same room. In this paper, we analyze these context-baseddoi:10.1145/3195970.3196106 dblp:conf/dac/MiettinenNSA18 fatcat:6qjhvgtmfvgxfmkv47arr27fxa