One thing I always wondered: why inclined people couldn&#x27;t buy the four locks and mechanically reverse engineer them?  Could someone not disassemble the lock and see where all the tumblers fit and iterate on a solution until they get it?<p>I feel that the people that would exploit the 3D key files now floating around the Internet could achieve almost the same thing anyways.<p>I don&#x27;t think any sufficiently logical person ever thought that a TSA lock was secure.