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Low Power Wide Area Network (LPWAN) technologies like the Long Range WideArea Network (LoRaWAN) standard provide the foundation of applicationsrealizing communication and intelligent interaction between almost any kind ofobject. These applications are commonly called Smart Cities and the Internet ofThings (IoT). Offering the potential of great benefits for mankind, theseapplications can also present a significant risk, especially when theirsecurity is compromised. This paper's work analyzes the possibility of twoparticular scenarios of impersonating a LoRaWAN gateway combining existingattacks. Impersonated gateways are of use when exploiting vulnerabilitiesalready shown by other researchers. We give a basic overview about LoRaWAN, theSemtech Packet Forwarder protocol, attacks needed to perform the impersonation,and assumptions made. We explain our attack and propose countermeasures toincrease the security of LoRaWAN networks. We show a gateway impersonation ispossible in particular circumstances but can be detected and prevented.

Impersonating LoRaWAN gateways using Semtech Packet Forwarder