2026-09-20 23:16 UTC
TL;DR if you wanna tempest some signal off a board but it's too low frequency to radiate, simply inject your own upconversion carrier by pointing an antenna at the victim device, and the modulated result radiates.
Replies (1)
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@gsuberland@chaos.social 2026-09-20 23:31
I actually quite like this one. usually I just look at these like "ah yes, good, physics is continuing to physics" because EM side channels are literally inevitable and nobody bothers to implement them in practice because it's so much engineering effort for so little chance of working outside of a lab, and that attacker effort yields more consistent results if directed towards other mechanisms. this is still just physics continuing to physics, but it's a genuinely new technique in this space.