The problem that comes to mind is if this is based on a set of vibrations any microphone that is sufficiently sensitive can probably get the exact combination of my key. If this becomes at all common then it would be trivial for any "locksmith" to make a new key based on these vibrations.
don't know how you are making yours but last time i checked it takes a bit of time and something to coll that mixture with if you want anything useful out of that. just a thought.
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The problem that comes to mind is if this is based on a set of vibrations any microphone that is sufficiently sensitive can probably get the exact combination of my key. If this becomes at all common then it would be trivial for any "locksmith" to make a new key based on these vibrations.
don't know how you are making yours but last time i checked it takes a bit of time and something to coll that mixture with if you want anything useful out of that. just a thought.