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1

Since you seem to be insisting on a brute-force analysis rather than an analysis of actual attacks that will be used against the method instead, here is a (probably somewhat flawed) back-of-the-envelope calculation for brute force. We will assume the attacker knows your method but not any of your secrets the method depends on, per Kerckhoffs's principle: ...


-1

All purely conjecture, but I'm fairly convinced this method of audio analysis fingerprinting does not work in real life. In the ocean for subs yes but keys probably not. The initial attack of the audio signal from a mechanical keyboard is pretty loud, so it would be fairly difficult to mask.Systems that mask 40db SPL to 80db SPL for ambient sounds would not ...


2

You could for instance get the person to use such programs as language apps to get an acoustic fingerprint of the sets of letters. Just imagine the permutations of 'a quick brown fox jumps over the lazy dog'. A frequency analysis on the frequencies could provide letter to key sound mapping. In which case you could mitigate this by switching between dvorak, ...


3

In my opinion acoustic cryptanalysis is more of a proof of concept then to be used in real applications. What is possible to do? A few years ago guys from MIT (if I am not wrong) were able to log every keys on a mechanical keyboard using an Android/IOS phone application and just by placing that specific phone near the keyboard. Things you can do to ...



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