Elements and Design
The field of security engineering has identified the following elements to physical security:
- obstacles, to frustrate trivial attackers and delay serious ones; to include:
- explosion protection;
- detection systems, such as surveillance systems, alarms, security lighting, security guard patrols or closed-circuit television cameras, to make it likely that attacks will be noticed; and
- security response, to repel, catch or frustrate attackers when an attack is detected.
In a well designed system, these features must complement each other. There are at least four layers of physical security:
- Environmental design
- Mechanical, electronic and procedural access control
- Intrusion detection (with appropriate response procedures)
- Personnel Identification (authentication)
There may be many choices to consider and there is no "best" solution that will satisfy a broad class of situations. Each situation is unique. What is offered in this article are only proven techniques, but not always required or expected, or satisfactory for the end user.
Read more about this topic: Physical Security
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—Antonin Artaud (1896–1948)