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Physical-layer device identification aims at identifying wireless devices during radio communication by exploiting unique characteristics of their analog (radio) circuitry. This paper systematizes the existing knowledge on this topic in order to enable a better understanding of device identification, its implications on the analysis and design of security solutions in wireless networks and possible applications. They therefore present a systematic review of physical-layer identification systems and provide a summary of current state-of-the-art techniques. They further present a classification of attacks and discuss the feasibility, limitations, and implications in selected applications.
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