Electromagnetic Keyboard Eavesdropping Research Revealed

Swiss researchers have developed 4 different attacks that are capable of reproducing what someone has typed on a keyboard without using any additional hardware or software.

Every keyboard tested was vulnerable to at least one of the four attacks the researchers used. One attack was shown to work over a distance of 20 metres.

In their work the researchers used a radio antenna to "fully or partially recover keystrokes" by spotting the electromagnetic radiation emitted when keys were pressed.

In a web posting they added: "no doubt that our attacks can be significantly improved, since we used relatively unexpensive equipments [sic]."

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