The sound of a key sliding into a lock could be enough information
to potentially create a copy of that key and open the lock
that's the conclusion of researchers who've been investigating
"acoustics-based physical key inference".
It makes sense, if you think about it: the clicks and clacks
of a key pushed into a pin tumbler lock actually reveal the
mechanism within, if you can slow down, isolate, and analyse
the sounds with enough accuracy.
Pulling off a trick like this would need a lot of work and
equipment, and would probably end up being more hassle than
learning how to pick the lock in the traditional way - but it's
an intriguing and unusual security loophole to ponder.
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