Which description best defines Physical Security in the context of COMSEC?

• A. Procedures for distributing keys
• B. Physical measures taken to safeguard COMSEC material
• C. Rules for granting access to classified information
• D. Audits of personnel security

Answer: (B)

Physical Security is about protecting the tangible COMSEC material from theft, loss, or damage through protective measures. This means secure storage like locked containers or safes, controlled access to where the material is kept, tamper-evident seals, proper handling and transport procedures, and routine inventories to detect any discrepancies. The idea is to shield the actual items and documents that enable secure communications from physical exposure or breach.

That’s why this description fits best: it explicitly refers to the physical measures used to safeguard the material itself. The other options focus on who can access information, how keys are distributed, or how personnel security is audited, which are about procedures or policies rather than the physical protection of COMSEC material.