Physical Security Threats
Physical security threats generally fall into a few main categories:
- Movement
- Smoke and fire
- Toxins
- People
- Energy anomalies
- Extreme temperature
- Gases
- Liquids
- Living organisms
- Projectiles
Donn Parker defined seven of these categories—extreme temperature, gases, liquids, living organisms, projectiles, movement, and energy anomalies—in his book Fighting Computer Crime, where he also introduces the Parkerian hexad.