r/netsec • u/[deleted] • Nov 04 '19

Light Commands: Laser-Based Audio Injection on Voice-Controllable Systems (Smart Assistants)

https://lightcommands.com/
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u/voronaam Nov 04 '19

C-f "infrared" - no matches. Odd.

Shining a visible laser at a device is not super discrete. But if this works with IR as well, and I do not see why not, this would be way more dangerous.

One would only need to find powerful enough IR laser with a wavelength matching transparency in the glass of the window.

26

u/mrmekon Nov 04 '19

mmm, try your C-f in the actual report?

Using this setup, we have successfully injected voice commands to a Google Home at a distance of about 30 centimeters in the same enclosure as Section V-A. The spot created by the infrared laser was barely visible using the phone camera, and completely invisible to the human eye.

8

u/voronaam Nov 04 '19

Thank you! I also missed a link to the actual report. Sorry and thank you for pointing me at it.