Lock that can't be picked
Lock picking is the art of unlocking a lock by analyzing and manipulating the components of the lock device without the original key. It takes lot of trial and error. The key to a lock that cannot be picked is finding a lock that is unique and rare.
Digital locks have an advantage over mechanical ones.They are usually controlled centrally, it is much simpler to allow new people access, or deny access to people who you have previously given keys to. The central control can be told to deny a certain pass-code, set of fingerprints, or security card.