GCHQ goons so clueless they think DC/DC converters are a security risk

[G0HZU]

Yeah, but across all three you might have enough to store "GCHQ sucks lol"

Or, instead of "GCHQ sucks lol" you could store and hide an encryption/decryption key for something else on the system...?

[Rasz]

DC/DC  is a good candidate for side channel RF com link

DC/DC that does PWM on the screen backligh is even better, because you can use whole BL like IRDA
http://en.wikipedia.org/wiki/Visible_light_communication


not so funny, eh?

My guess is GCHQ was just covering their tracks and removing their own implants.

[NiHaoMike]

DC/DC  is a good candidate for side channel RF com link

Some solar (micro)inverters use PLC to send their stats to a central hub. They modulate the PWM frequency or inject a (relatively) low frequency data waveform on the output.