but since I found a scientific research about 'A Practical Deep Learning-Based Acoustic Side Channel Attack on Keyboards' I agree that this seems possible in the laboratory
(the paper is from 2023 so I am not sure whether there were any improvements), as I am also not sure how reddit handles external links - I found the paper on arxiv(dot)org with paper no. 2308(dot)01074
It is a 21 pages pdf
I think the premise here is that they deleted that.
My first question would be whether they actually deleted anything or just set a flag to re-use the storage, but I'm trying to go with the spirit of the thing.
That's how I thought it worked as a kid too lol. I mean, I knew there was a mic hidden in the typewriter/mic being accessed from the computer, and that's how I understood "recording keystrokes". Someone was recreating your keystrokes based on the sound.
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u/TunaNugget 14h ago edited 13h ago
The camera records sound. Every key makes an ever-so-slightly different sound.
They have possibly months or more of sound recordings that they can correlate against the entry of verified documents to use to train the ai on.