alt Hacker News“One of the higher-frequency harmonics inevitably created by any real-world DAC during playback will then be the original fundamental, which should leak to the environment as a short-range radio transmission via the ad-hoc antenna formed by the physical wires and circuit traces in the audio output path.”
Sometimes I think I’m a smart guy…and then I read of people doing shit like this.
Replies
jofzar • today at 12:29 AM
Came here to say this, I literally can't believe this works.
It's like a couple of years ago where someone showed a proof of concept of turning a HDD into a microphone
➕ show 2 replies
Van Eck Phreaking dates back to 1982, which used CRTs, and if you're aware of that, it's not an insurmountably huge logical leap to realize that modern hardware can be exploited the same way (thanks to greater sensitivity in receiving devices).
https://en.wikipedia.org/wiki/Van_Eck_phreaking