7 ms·
This is pretty amazing, worked well out-of-the-box between my laptop and phone. Makes me think of all the weird ways that one could exfiltrate data (to use a di
by asteli 8y ago
This is pretty amazing, worked well out-of-the-box between my laptop and phone. Makes me think of all the weird ways that one could exfiltrate data (to use a different example I've seen, convincing a device to puke its firmware out via an LED)
Also I'm pleasantly surprised by my ability to hear (barely) the 19kHz carrier.
- paulie_a 8y agoSome group either got caught or proved you could exfiltrate data via the fans on the air gapped computer to the microphone on the connected one. It was obviously incredibly low speed but possible. I honestly don't recall if this was just a trial or it was used in the field by a spy agency
- Nition 8y agoI saw one where they got audio out of a silent video of sound waves in the area vibrating a potato chip packet on the ground. http://news.mit.edu/2014/algorithm-recovers-speech-from-vibrations-0804 http://news.mit.edu/2014/algorithm-recovers-speech-from-vibr...
- disqard 8y agoThat was impressive work, but they do require a camera that can record at 2000-6000 fps.
- Nition 8y agoCheck out the last portion of the video. They got something out of a 60fps camera, although it's far from good quality.
- jacquesm 8y agoThat's logical. Nyquist won't budge just because your idea is clever. https://en.wikipedia.org/wiki/Nyquist_rate https://en.wikipedia.org/wiki/Nyquist_rate
- Nition 8y agoThey actually got Nyquist to budge to some extent. Check out the last portion of the video. They took advantage of the fact that digital cameras tend to scan line by line over a short period of time, so there's actually more timing information available in an image than the base 60fps.
- schoen 8y agoIt looks like you might be thinking of this: https://www.wired.com/2016/06/clever-attack-uses-sound-computers-fan-steal-data/ https://www.wired.com/2016/06/clever-attack-uses-sound-compu... https://www.wired.com/story/air-gap-researcher-mordechai-guri/ https://www.wired.com/story/air-gap-researcher-mordechai-gur...
- deleted 8y ago[deleted]
- zwkrt 8y agoI've seen a prototype IoT thing (let's say a lightbulb) that paired with its peers by transmitting a public key through a flashing LED. Never became a product, but made me realize how easy such a thing is.
- gh02t 8y agoI've heard of this being used in a few products, especially more advanced "LiFi" systems. I think one company was advertising an in store network for things like setting price signs and such based on optical data transmission using special bulbs.
- Jach 8y agoA friend owns a few "smart power strips", you connect them to a wifi network by installing a phone app, then when you're ready holding the phone screen up against a light sensor on the strip. The phone screen flashes a bunch to send the network info and whatever else over. It seemed like a non-techie friendly way of doing it while also being cheaper than either adding a bluetooth module and having the phone connect over that first, a central hub, or a little screen + keypad like printers.
- nsp 8y ago.