The reports and warnings about lock bumping are genuine. Lock bumping, also known as “bump keying” and “key bumping” describes a technique in which an ordinary key can be filed so that, when it is inserted into a door lock and tapped, the internal pins can be jarred in such a way that the lock will open. The majority of pin-tumbler locks currently in use are vulnerable to lock bumping, including those normally found on people’s front doors. The technique is simple enough that, with the right knowledge, and a little practice, just about anybody could use it.
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