AES-256 keys sniffed in seconds using E200 of kit a few inches away

["Dave Farber" <farber () gmail com>]

> AES-256 keys sniffed in seconds using E200 of kit a few inches away
>
> https://www.theregister.co.uk/2017/06/23/aes_256_cracked_50_seconds_200_kit/
>
>      Sideband attacks that monitor a computer's electromagnetic
>    output to snaffle passwords are nothing new.  They usually
>    require direct access to the target system and a lot of
>    expensive machinery - but no longer.  Researchers at Fox-IT
>    have managed to wirelessly extract secret AES-256 encryption
>    keys from a distance of one metre (3.3 feet) - using EUR200
>    (~US$224) worth of parts obtained from a standard electronics
>    store - just by measuring electromagnetic radiation. At that
>    distance sniffing the keys over the air took five minutes, but
>    if an attacker got within 30 centimetres (11.8 inches) of a
>    device, the extraction time is cut down to just 50 seconds.


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