A team of researchers at UC San Diego has developed a firmware update that can completely hide a smartphone’s unique Bluetooth fingerprint, eliminating the vulnerability discovered in 2022. This method uses complex math, but the implementation is simple. By randomizing different layers, like contact lenses, the researchers make it difficult to track a device through its Bluetooth signals, even for highly advanced attackers. Testing showed that attackers would need to observe a device for more than 10 days to achieve the same tracking accuracy as before. The team is now seeking industry partners to integrate this defense into Bluetooth Low Energy chipsets.
https://today.ucsd.edu/story/a-simple-firmware-update-completely-hides-a-devices-bluetooth-fingerprint