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shared by John Lemke on 06 Apr 11 - No Cached

shared by John Lemke on 27 Aug 14 - No Cached

A team of computer security experts at Tel Aviv University (Israel) has come up with a new potentially much simpler method that lets you steal data from computers — Just Touch it — literally.
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In order to victimize any computer, all you need to do is wear a special digitizer wristband and touch the exposed part of the system. The wristband will measure all the tiny changes in the ground electrical potential that can reveal even stronger encryption keys, such as a 4,096-bit RSA key.
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in some cases, you don't even have to touch the system directly with your bare hands. You can intercept encryption keys from attached network and video cables as well. Researchers called it a side-channel attack.
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The actual attack can be performed quickly. According to the research, "despite the GHz-scale clock rate of the laptops and numerous noise sources, the full attacks require a few seconds of measurements using medium frequency signals (around 2 MHz), or one hour using low frequency signals (up to 40 kHz)."
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