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

[Zenaan Harkness]

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.