A vulnerability across at least eight brands of wireless keyboards lets hackers read keystrokes from 250 feet away, according to wireless security vendor Bastille.

The problem is that the keyboards transmit to their associated PCs without encryption, and it’s just a matter of reverse engineering the signals to figure out how to read what keys are being hit, say Bastille researchers. An attacker could inject keystrokes while the keyboard is idle and the machine is logged in, they say, using a dongle that can be fashioned for less than $ 100.

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