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Could I be tracked playing things over a bluetooth device?
| Yep, depending on the device. Most things store a log of what they were last connected to, for ease of reconnecting. However, it's usually a pain in the ass unless it's a smart device. The easiest way is to just intercept the bluetooth signal and act as a hidden man in the middle.
| >>317868 Bluetooth sends the devices Mac address so unless you're spoofing it all they need is to know who uses that device.
Some devices spoof Mac address until you actual connect, this was to stop malls from tracking where people went inside
| >>317868
This question can only be answered if the implementation of the bluetooth hardware, driver and used software is open source. Else it's hard to say if devices leave/store fingerprints. My smartphone os automatically remembers connected bluetooth devices and is able to recognize them again. So Bluetooth interfaces seem to have a hardware identifier adresss, like network interfaces MAC address.
On my phone I can delete those traces. On closed systems you never know.
| But it won't show up on a packet sniffer, right?
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| If I were to send audio to a bluetooth speaker or a video to a smart TV would there be any way for someone to track who did it?