Ultrasound, sound with a pitch too high to be heard by us humans, may be used in places to track your behavior, to know where you've been, what channel you're watching on TV, tracking a record of what you watch on YouTube.. without the tracker leaving your pocket.
This project is a first of its kind to serve as a tracker of trackers, to know who tracks you, with what message, mapping the ultrasound-unsafe areas around you, and telling you when you're being spied on.
It could also possibly act as a spoofer.
See more on hackaday.
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10.1080/10739149.2014.971329
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10.1111/2041-210X.12678
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https://www.wired.com/story/when-wifi-wont-work-let-sound-carry-your-data/
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Excellent! 2016
Let's Keep It Simple Stupid
- Arduino
- Electret
- Mini screen
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- signals
The signals used to track are in the 18-20kHZ range. Some microphones, like electrets, still receive this range of frequency.
This frequency is to be isolated in the Fourrier space, in a arduino piece of code, cleaned, and analysed.
Any suspicious signals will be tracked.
With enough recordings, we'll work on understanding the communicaton protocol, to use in a last phase.
Tested with 18kHz and 20kHz wav soundfiles, the peaks are well resolved:
- Startup uses ultrasound chirps to covertly link and track all your devices
- Ultrasound Tracking Beacons Making Things Sort of Creepy For Consumers
- How to Block the Ultrasonic Signals You Didn’t Know Were Tracking You
- Beware of ads that use inaudible sound to link your phone, TV, tablet, and PC Privacy advocates warn feds about surreptitious cross-device tracking.
- Hackaday blog post
- An excellent paper
- Silverpush
- Shopkick
- lisnr
- Signal360
React
Typescript
Django
Laravel
Facebook
Microsoft
Google
Alibaba
D3
Tencent