What is 'intrusion detection' in physical security systems?

Intrusion detection in physical security systems refers specifically to the monitoring of areas to identify unauthorized access. This process involves the use of various technologies and methods, such as motion detectors, surveillance cameras, and alarms, to detect when someone enters a restricted or secured space without permission. It serves as a vital function in preserving the integrity of the premises, protecting assets, and ensuring the safety of individuals in the area.

Effective intrusion detection systems are essential for alerting security personnel and allowing for timely responses to potential breaches. The focus is on real-time monitoring to instantly recognize and respond to unauthorized actions, which is a core aspect of physical security. It’s integral in maintaining control over the environment and reducing the risk of theft, vandalism, or other illicit activities.

The other choices do not accurately represent the concept of intrusion detection. Securing exits involves ensuring that all egress points are monitored and controlled, password protection pertains to electronic access control, and a physical security audit is an evaluation of the current security measures in place, rather than the active monitoring for intrusions.