Sniffing Keystrokes with Lasers and Voltmeters

Author Andrea Barisani
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Description The exploitation of Electromagnetic Emanations and similar Side Channels has always been one of the most interesting and "exotic" areas of attack in the security field.

In the late 60's and early 70's the term TEMPEST[1] was coined to title an NSA operation which aimed to secure electronic equipment from leakage of compromising emanations. Well known TEMPEST research describes remote eavesdropping of CRT displays and most recently LCD displays, as well as optical emanations from appliances LED indicators.

Our research details two attacks, one against wired PS/2 keyboards, the other against laptop keyboards using respectively power line leakage and optical sampling of mechanical energy.

We describe how using relatively cheap homemade hardware we can implement basic but powerful techniques for remotely eavesdropping keystrokes.
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Size 55.78kB
Date Thursday 30 July 2009 - 10:52:59
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