That&#x27;s generally not true. For example: you could buy a few copies of the same lock and take them apart. Unless there&#x27;s something Really Funky going on, you can use the master oracle method as well (start with your working key, and change one pin at a time to derive the master key, as most locks with a master can be opened with all the pins set to the normal key and any one pin set to the master keying.<p>I&#x27;d say what this &quot;leak&quot; really did was (a) show the world that real security is hard to think about, and (b) make it easier for normal folks who don&#x27;t know about how locks work to impress their friends with their ninja secret agent tools.<p>Really, this is all just a parable for the big fight over encryption. Do you really want to trust a government agency with any kind of control over how we lock down our stuff? Newp, nope, and noooope.