Input/output (I/O) devices are major attack vectors. Where interactions occur so can attacks. Wireless I/O, especially a popular implementation like Bluetooth, can allow unintended parties to meddle directly with the communications you send and receive with a system. Radio frequency-based I/O devices are the most vulnerable, but others such as infrared and proprietary implementations can be just as vulnerable. Unfortunately, this is not getting better. Technological advances mean that as RF devices get more powerful, their range increases, as well as the length of their attack vector.
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