Physical Security focuses on the protection of people, property and facilities through the use of security forces, security systems and security procedures. Physical security can include the use of barriers, alarms, locks, access control systems, protective lighting, closed circuit televisions, and other state-of-the-art security technology.
There are three main components to physical security. First, obstacles can be placed in the way of potential attackers and facilities or homes can be hardened against accidents and environmental disasters. Such measures can include multiple locks, fencing, walls, fireproof safes, and water sprinklers. Second, surveillance and notification systems can be put in place, such as lighting, heat sensors, smoke detectors, intrusion detectors, alarms, and cameras. Third, methods can be implemented to apprehend attackers (preferably before any damage has been done) and to recover quickly from accidents, fires, or natural disasters.