While many people may use Bluetooth every day, the majority don't know how it works or that it can be hacked. Bluetooth hacking gives a clear window into the world of the target. Nearly every device has Bluetooth capabilities, and people store a great deal of personal info on their phones and tablets. Hack their Bluetooth connection, and you may be able to access all of that data.
Although Bluetooth shares the same 2.4 GHz frequency as Wi-Fi, the properties are different because the protocols are not quite the same. There's enhanced security so that popular Wi-Fi hacking tools won't work on Bluetooth.
For one, they're continually hopping frequencies, so if you have two devices communicating over Bluetooth, they're both using an algorithm that shifts the frequency many times per second. That means we can't merely sit on one frequency and listen because they're going to be hopping all over the place. It makes it difficult for an attacker to listen in on the conversation in the first place.
Another property is that Bluetooth doesn't negotiate a key every single time like Wi-Fi does, where it's easy for anyone to join and leave the Wi-Fi network. Instead, Bluetooth negotiates a key once at the beginning, stores the secret key, and then refers to it every time it sees the same device. That means it's impossible to sit there and sniff the key because you need to be there the first time these devices communicate. Otherwise, you're not going to get anything useful, and it's impossible to jump into the conversation the way you can with Wi-Fi.
However, we can still track nearby Bluetooth devices, read from them, and even write specific characteristics. Because ..
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