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GP mentioned Bluetooth proxying (i.e. using two devices forwarding protocol messages bidirectionally to create a "Bluetooth wormhole"), which doesn't have any o
by lxgr 2y ago
GP mentioned Bluetooth proxying (i.e. using two devices forwarding protocol messages bidirectionally to create a "Bluetooth wormhole"), which doesn't have any obvious inherent distance bound in this protocol, as as far as I can tell.
- 0x457 2y agoI guess it's possible to reduce radius where that attack is executable with signal level.
- lxgr 2y agoUnless there is an API to actively limit the broadcasting signal strength via BLE that authenticator implementations could leverage, I don't see how. And even then you'll quickly run into problems when the attacker's receiver has better antennas in better locations than e.g. the user's laptop.