[eightnoneone]

The quality of locks has always been measured in time.

[Terr_]

When you get down to it, most security measures are ultimately based around creating enough delay that someone can respond with violence.

P.S.: Trying to think of the rare examples that don't qualify, and so far:

1. Direct violent response, e.g. booby-traps.

2. Denial by destroying whatever the attacker wanted, or delaying them enough that time renders it valueless.

3. Denial by making the effort unprofitable, even with no hard time limits.