Nonetheless, there are limits to this method, the study admits. The study, entitled " Evaluating Physical-Layer BLE Location Tracking Attacks on Mobile Devices," will be formally presented at the IEEE Symposium on Security and Privacy in May 2022. However, once a device's Bluetooth signal profile was known, the researchers said, they were able to follow the device around town with an accuracy rate of 96%. They found that picking out individual devices using Bluetooth signals in public places was not that efficient - they were able to identify devices only between 40% and 50% of the time. Study leaders Hadi Givehchian and Nishant Bhaskar told The Register that the equipment needed to track these devices would cost about $200.
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