Researchers have come up with a device, made from $300 worth of easily obtained parts, that can pull encryption keys out of the air by analyzing radio frequencies emitted by your processor.
The attack can pull keys from RSA and ElGamal implementations as well as the popular GnuPG.
Range of the described device is 19 inches but could theoretically be extended with amplification.
Check the underside of your desk?
You can read the paper here.
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