That little blip on the radar is my iPhone. Now I know that it's within range of me and is accessible via Bluetooth. Someone a whole lot craftier than I am might already be able to do some damage. Now, this is just me sitting in my house. But imagine if I were using this on, say, a college campus. I'd see blips all over that radar just waiting to get their blues snarfed. Creepy, sure, but bluebugging is even worse. Now that I know your Bluetooth is there, I would activate my second bit of software, which can connect to your device, giving me access to your phone's features. I can track your location, listen to your calls, make my own calls, read and send text messages, and load your phone with pictures of an old man's wiener if I wanted to.
Now, let's talk about John Hering.
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He's a student who developed something called the BlueSniper Rifle, a device that can see Bluetooth connections from up to a mile away. Hering says that this is to sniff out vulnerabilities and not to exploit anyone, which is exactly what an unassuming supervillain would say if prompted. So that whole 32-foot-range thing I mentioned earlier is a bit of a moot point. Now we're dealing with Batman-esque Bluetooth tech, where people can listen to your phone calls from a mile away. Don't believe me, though. Take it from the NSA. They have some experience in the field.