argv minus one on Nostr: npub17uthx…trzd9 This article ...
npub17uthxxu84fru49lrnve8v4290u73dfksnujrg7sgxhc28uf8x2fqztrzd9 (npub17ut…rzd9)
This article https://www.wired.com/story/monitor-ultrasonic-sounds-reveal-content-side-channel/ says it's only 30 feet, not miles. That's still a large enough radius that you could easily miss a hidden microphone, though.
Electronics, like screens and computers, also produce electromagnetic emissions that can be captured at a distance. I was hearing about that attack back in the early 2000s.
Acoustic and electromagnetic emissions are both subject to “emission security” standards by spy agencies and the like. https://en.wikipedia.org/wiki/Tempest_(codename)
npub1f8h0s4qldwlujpdns39c3vpkvr09qhk5rtzkn2xzemfcg69gkp7qhv4tw2 (npub1f8h…4tw2)
This article https://www.wired.com/story/monitor-ultrasonic-sounds-reveal-content-side-channel/ says it's only 30 feet, not miles. That's still a large enough radius that you could easily miss a hidden microphone, though.
Electronics, like screens and computers, also produce electromagnetic emissions that can be captured at a distance. I was hearing about that attack back in the early 2000s.
Acoustic and electromagnetic emissions are both subject to “emission security” standards by spy agencies and the like. https://en.wikipedia.org/wiki/Tempest_(codename)
npub1f8h0s4qldwlujpdns39c3vpkvr09qhk5rtzkn2xzemfcg69gkp7qhv4tw2 (npub1f8h…4tw2)