Comment Love the clickbait summary... (Score 1) 90
Firstly, requiring physical access is a massive barrier. You'd have to have a massively lucrative target to even risk trying to find what machine in a data center to (reading an article)...
Put in a device that sits between the memory and the CPU. Yea, nobody is going to notice somebody replacing all the memory in a machine with some random parts. Oh, of course that doesn't mess with the signaling at all and the BIOS will post perfectly with some janky ribbon cable setup.
And then, just sent the data via cellular internet from inside a metal box inside a metal box inside a big old building? Just hope nobody notices a random extra CAT 6 sticking out randomly from the box?
Look, research is all good, but security also lives in a practical context and I doubt Intel or AMD are really worried about this at all.