Swiss researchers have demonstrated keystrokes can be recorded wirelessly from wired keyboards by analysing the electromagnetic signals produced by every key press.
Martin Vuagnoux and Sylvain Pasini, researchers from the Lausanne Security and Cryptography Laboratory, published a report detailing their findings. The pair tested 11 common keyboards manufactured from 2001-2008 which were all vulnerable to at least one of their 4 attacks.
The researchers used a radio antenna to "fully or partially recover keystrokes" by spotting the electromagnetic radiation emitted when keys were pressed.
2 videos have been posted by the researchers that demonstrate the technique involved.
The pair concluded that wired computer keyboards sold in stores "are not safe to transmit sensitive information".