The age of the Internet of Things is adding an increasing number of new
devices to the Internet and is expected to have fifty billion connected units
by 2021. These form an extensive network that may have multiple points where
there is a risk of attacks that can compromise the entire system. This paper
has conducted a systematic review of security in LoRaWAN protocol specification
versions 1.0 and 1.1 by locating its vulnerabilities and determining what
measures can be taken for improvement and how they can be checked or tested.
The review identifies nineteen areas of vulnerability in the LoRaWAN protocol
and shows that the current studies focus on specification version 1.0, key
management, and authentication procedures.

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