NIniftich·Jun 29, 2016
Indeed. The same person who worked on the Chromecast implementation has a repo with some other examples of sonic networking:
https://github.com/borismus/sonicnet.js
In PulseAudio 9.0 releasedborismus
sonicnet.js
JavaScript2013–2016
borismus / sonicnet.js
sonicnet.js
Ultrasonic Networking with the Web Audio API
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867GitHub stars
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Ultrasonic Networking with the Web Audio API
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Observed mentions: 2013-10-31 21:38:37 UTC to 2016-06-29 05:57:52 UTC.
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| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| 2013 | 2013-01-01 00:00:00 UTC | 2014-01-01 00:00:00 UTC | 3 | 0 | 3 |
| 2014 | 2014-01-01 00:00:00 UTC | 2015-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2015 | 2015-01-01 00:00:00 UTC | 2016-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2016 | 2016-01-01 00:00:00 UTC | 2017-01-01 00:00:00 UTC | 2 | 0 | 2 |
What Hacker News says
6 sourcesNot sure if this is what you meant, but Chromecast's guest mode will pair using ultrasound. The guy who worked on it has some code using the WebAudio API on github and his linked blog:
https://github.com/borismus/sonicnet.js
In Show HN: TCP/UDP over soundThere are various working implementations of this idea, such as quitenet (python) [1] and sonicnet (javascript) [2].
1. https://github.com/Katee/quietnet
2. https://github.com/borismus/sonicnet.js
In High-frequency malware communication (2013)There are multiple known examples of running code which does soundcard communication - see e.g. https://github.com/borismus/sonicnet.js. I can personally verify that it required no special handling to work on two laptops made by different manufacturers running different operating systems in a noisy room.
This doesn't mean that BadBIOS is true — only that it's annoying and tedious to play the skeptic with shoddy logic and trust-me assertions being presented as facts.
In The BadBIOS Analysis is WrongThe badBIOS story is frustratingly short on details but this confused post seems to be making a lot of assumptions which add restrictions and then argue that it's impossible because of those guessed details:
1. He wastes time talking about “high frequency” as if it means radio EFI, which was never claimed and is an odd tangent.
2. Apparently at some point he actually read the original claims and realized that they were talking about sound and then makes the claim that this is simply impossible due to hardware limitations. See e.g. the running code at https://github.com/borismus/sonicnet.js demonstrating why this claim needed more than his personal assertion to be considered truth.
3. The main logical fault is the extended discussion about how limited the BIOS environment is, apparently under the belief that somehow everything must be impl
Read the rest
emented at that level rather than, say, shipping with different versions for various manufacturers which use that as a way to inject the actual payload into the OS. Put another way, what are the odds that someone would be competent enough to build any of the other pieces but not realize that you can do hardware detection and build a library of exploits for, say, common Mac laptops?
4. Claims about being able to catch this trivially by dumping the BIOS are suspect unless he's talking about extracting the chip and reading it on a known-good system — anything running on the suspect box runs into a textbook trust problem which isn't even acknowledged in this post.
There already exists browser based implementations of basic ultrasonic networking on github - https://github.com/borismus/sonicnet.js/tree/master/lib
Assuming decent error checking, the question isn't whether you could do it, it is just how fast would it be.
In Mysterious Mac and PC malware that jumps airgaps?