27Mhz Wireless Keyboard Analysis Report aka "We Know What You Typed Last Summer"

Using just a simple radio receiver, a soundcard and suitable software, the remote-exploit.org members Max Moser & Philipp Schroedel have managed to tap and decode the radio frequencies transmitted between the keyboard and PC/notebook computer.

http://www.securiteam.com/securityre...G0030KKKI.html