Don't trust electronic locks. Years ago I got a safe that wasn't one of the top-end models of its line. In particular, the manual said that it only had one com

Don't trust electronic locks. Years ago I got a safe that wasn't one of the top-end models of its line. In particular, the manual said that it only had one combination slot. But other models had more premium features, such as multiple combinations, "master" and "slave" combos, etc. -- I acquired the manual for them, and sure enough, these features were present on my cheaper model, with default combinations. My guess is that anyone could walk up to one of these safes in someone's home and open it within seconds. I assume this is well known in the industry. I also have to assume that there are additional hidden combinations, meant for manufacturer convenience, or put there with a wink and a nod to the police, or installed by unscrupulous firmware engineers.