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LoRaWAN, part of the long range Internet of Things (IoT) technologies, is a Low Power Wide Area (LPWA) protocol that enables communication between the battery operated resource constrained devices. Although LoRaWAN provides system-level security, these networks are based on a basic assumption of trust between the network server and the user, which as a result empowers a network server with undue authorities. Moreover, the nature of the LoRaWAN join procedure, which is a key component for ensuring network operation, is highly susceptible to jamming and replay attacks through slight packet manipulation, thus making the network vulnerable. In order to address these deficiencies, we present a blockchain-based distributed framework for the LoRaWAN join procedure, in order to provide a secure and trusted authentication system within LoRaWAN networks. Our proposed solution eliminates the …