Masterlocks are trivial. I can open any of the ubiquitous combo locks in no more than five seconds (I've taught several trustworthy people how to do this). Th

Masterlocks are trivial. I can open any of the ubiquitous combo locks in no more than five seconds (I've taught several trustworthy people how to do this). The keyed locks are pretty good intro to lockpicking locks (I've taught lock picking on those, but it's not quite as fast). I'm not by any means suggesting that it's OK to steal stuff or that you were asking about it, but there are lots of really bad locks out there that are almost not worth having for anything other than little puzzles. E.g., my daughter is on the cover of the LSI lockpicking guide, but still finds herself completely helpless when she forgets her key. Internet security and physical security are similar in that people will sell you lies that leave you sad when disaster strikes.