In the past, I’ve run into roadblocks while trying to figure out what was going on during various Bluetooth communications such as pairing and encryption, so I’ve put together this blog post to help explain some of the security aspects, how these aspects are typically used, and how to easily spot a few of them during a research effort. This is important when one has to deal with environments where older and less secure Bluetooth implementations on older IoT devices have to interact with the new IoT devices which are capable of better security, and you have to determine what security is actually being used. As a researcher, it helps when looking at the various Internet of Things (IoT) devices to understand what a vendor of an IoT device actually implemented.
The Bluetooth specification is huge and quite complex.
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