cacciato wrote:Does this really work for modern house door locks?
It works especially well for modern pin tumbler door locks. 100 years ago it did not work because many locks used what people typically call "skeleton keys" These locks are called lever locks and although not very common in America unless you find one in an old house, in Britain and other parts of Europe they are very common and bump proof. Also difficult to pick.
Back to bumping though. Typically, the better made the pin tumbler lock, the better and more evenly distributed the force of a bump key onto the individual pins in the lock.
you can read a lot about it by browsing this forum, and reading this
http://www.toool.nl/bumping.pdf
welcome to a magical land. =)
Squelchtone