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Extracting encryption keys from electromagnetic emanation

June 24, 2015

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Israeli scientists from Tel Aviv University constructed a 300 USD tool used to eavesdrop on electromagnetic emanation of a computer (laptop). This way, they were able to determine within milliseconds whether the computer is active or idle, whether it performs some encryption operations and in some cases even extract the used encryption keys. The disadvantage of this method is the necessity to place the eavesdropping device into immediate vicinity of the computer (up to 50 cm).

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