Physical security includes all the real world things used for old heist movies. Men with masks and swag bags, safes, dynamite and the local sheriff are things in the physical security world.
An attack is damage, intrusion or theft.
Three types of thing are used for defence.
- an obstacle, like an armoured door, that blocks an attack
- a detector, like a camera, that notices an attack
- a responder, like a security guard, who does something about an attack