this post was submitted on 09 Dec 2023
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Wouldn't it only be trained on a specific keyboard though, as anyone in the Mechanical keyboard community knows every keyboard sounds different. And that doesn't even account for age, condition(dust, how many crisps have you eaten over your keyboard, etc).
So I highly doubt this could be effective beyond possibility being trained to work with a certain type of laptop. 16 inch MacBook Pros for example.
Doesn't matter that much if you cast your malware broadly enough, for example requesting mic access from a web page. A large percentage of keyboards (especially business laptops) will be covered just by Mac + Lenovo.
I suspect it also uses timing between each key stroke to basically triangulate all possible combinations (this method would at least have to know the exact starting key to construct the password from this distance info, that is why I said all possible combinations)
You can just solve the problem altogether by using a password manager with a 2fa dongle like a nitro or yubi key