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Not to disk, writing to RAM is the important part. DDR3 runs at high fixed frequencies, so you can use a pretty sharp filter to find it.

Oh wow that’s crazy

So basically we can detect locally driven AI devices too, anything physical AI is going to be carrying a fuckton of memory.

This will be useful for the Butlerian Jihad.

I think the cutting edge part, is that a couple of college students can do this for $100 in parts with a laptop and open source software.

Not necessarily that it wasn't done decades ago for millions by well funded government agencies, who then didn't talk about it.

New tech standing on the shoulders of old tech, as it does.

Intelligence services are very likely far ahead and for obvious reasons the public is not privy to it.