How secure is Bluetooth?

It’s not something that you control. It either happens or it doesn’t. But if it does happen, that is somewhat more secure than if it doesn’t. The determining factor for whether it happens is usually whether the peripheral is physically capable of supporting the entry of a PIN. For example, Bluetooth speakers typically can’t do that, while a Bluetooth keyboard obviously can. A car typically can although on older cars, that was a somewhat laborious (one-off) process.

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