FORCE All security measures can only take a certain amount of force before its capacity collapses. This pertains to the applied level or intervention of force it takes for a security measure to fail.
EFFORT All security measures require human, machine or other controllable entity effort to bypass or overcome. This pertains to the actual “work” and setup involved in executing a plan.
TIME All security measures have a finite amount of time of being effective before failure. This pertains to the fact that regardless of effort or force, any security measure will fail in time.
Each rule individually could amount to zero depending on the situation and objective, but at least one rule must be more than zero to be classified as “security”.
However, even if a particular rule is zero, it must still be analyzed into the equation of security. As in mathematics, “0” is not “nothing”, it does have value.
[The photo was taken in an alleyway in Hanoi.]