A recent test by an independent party proved that almost all keyboards produce electromagnetic emanations, this included wired.
The party was able to take 11 different wired keyboards, and in 4 different attempts to type something in the keyboard (attached only to a power supply) and recover fully what was typed, or part of what was typed. This was all up to 20 Meters away.Beware at your office, or with your laptop out in the public, because every wired or wireless keyboard is vulnerable. You can see the video of 1 of the 4 ways the party retrieved the text "Trust No One" off of the keyboard.
