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Remote attestation protocols are widely used to detect device configuration(e.g., software and/or data) compromise in Internet of Things (IoT) scenarios.Unfortunately, the performances of such protocols are unsatisfactory whendealing with thousands of smart devices. Recently, researchers are focusing onaddressing this limitation. The approach is to run attestation in a collectiveway, with the goal of reducing computation and communication. Despite theseadvances, current solutions for attestation are still unsatisfactory because oftheir complex management and strict assumptions concerning the topology (e.g.,being time invariant or maintaining a fixed topology). In this paper, wepropose PADS, a secure, efficient, and practical protocol for attestingpotentially large networks of smart devices with unstructured or dynamictopologies. PADS builds upon the recent concept of non-interactive attestation,by reducing the collective attestation problem into a minimum consensus one. Wecompare PADS with a state-of-the art collective attestation protocol andvalidate it by using realistic simulations that show practicality andefficiency. The results confirm the suitability of PADS for low-end devices,and highly unstructured networks.

PADS: Practical Attestation for Highly Dynamic Swarm Topologies