Physical Security

Overview

Physical security includes site selection, barriers, locks, guards, badges, surveillance, visitor controls, secure areas, environmental monitoring, power, fire protection, and equipment disposal. It supports technology security by protecting the hardware and locations that enforce digital controls.

Threats include theft, tampering, coercion, disaster, utility failure, unauthorized photography, tailgating, and malicious maintenance. Remote or cloud services still depend on provider facilities, personnel, supply chains, and hardware handling.

Organizations should classify spaces and assets, restrict access, monitor entry, test alarms and continuity, secure backups, and review vendor controls. Procedures must cover visitors, deliveries, repairs, emergency access, media destruction, and lost devices. Access records should be reviewed for anomalies, not merely collected for retention.

In practice, Physical Security should be evaluated with risk so preventive controls, risk decisions, and response evidence remain connected.

Physical Security is a security mechanism or control discipline that protects people, facilities, devices, media, infrastructure, and assets from unauthorized access, theft, damage, interference, or environmental hazards. Digital controls ultimately depend on physical systems and people, making facility access, environmental resilience, equipment custody, and disposal essential.

A production treatment of Physical Security should test protection of people, facilities, devices, media, infrastructure, and assets from unauthorized access, theft, damage, interference, or environmental hazards within the relevant asset, decision, or service state. The Physical Security context record for people, facilities, and devices should preserve source data, configuration or policy version, responsible actor, exception, and outcome. Review of Physical Security should determine whether safeguards addressing people, facilities, and devices changed exposure in practice, not merely whether a document or setting existed.

Quality review for Physical Security should sample real cases involving people, facilities, and devices, compare expected and actual outcomes, and track unresolved exceptions until remediation is independently verified.