| > Isn't the point of a lock just to keep honest people honest? No. Honest people don't need to be "kept honest". Locks have the same purpose as other security systems (including electronic ones like crypto, etc.). They aren't intended to (and can't) keep a determined attacker out. What they do is increase the cost (in terms of time, effort, risk, etc.) of gaining access. The point is -- as far as possible -- to make the cost of gaining access exceed the benefit that would be gained by that access. |
If you found a twenty on the floor in an abandoned alleyway, would you hand it in to police, or would you steal that money?
If your first thought was "It's not stealing for such a small amount", or "It's clearly been abandoned, so it's ok to take it", then you're the target audience for being kept honest.
Your other point is spot on: the aim is to increase the friction of entry and raise a mental barrier in the mind of the subject which results in an outcome you would prefer (no break-in).