Frequency attenuation + sub-pixel color profiling means you don't even need an expensive camera in a lot of cases.
Get a plastic cup of water or similar object, put it on someone's desk, record video from far away, combine with something like this [0] and you've got a very interesting avenue for corporate espionage. If you could reconstruct typed passwords from the object, it's a really powerful technique.
https://news.mit.edu/2014/algorithm-recovers-speech-from-vib...
Frequency attenuation + sub-pixel color profiling means you don't even need an expensive camera in a lot of cases.
Get a plastic cup of water or similar object, put it on someone's desk, record video from far away, combine with something like this [0] and you've got a very interesting avenue for corporate espionage. If you could reconstruct typed passwords from the object, it's a really powerful technique.
[0] https://people.eecs.berkeley.edu/~tygar/papers/Keyboard_Acou...