Which security category concerns protecting assets through physical measures against observation by unauthorized persons?

Which security category concerns protecting assets through physical measures against observation by unauthorized persons?

• A. Physical Security
• B. Emission Security
• C. Crypto Security
• D. Transmission Security

Answer: (A)

The main idea is using physical controls to keep assets from being seen or accessed by someone unauthorized. Physical security covers the measures that prevent visual observation or direct tampering—like locked spaces, access-controlled doors, privacy screens, and guards—so only approved individuals can see or handle sensitive items. This is different from Emission Security, which aims to stop unintended electronic emissions from revealing information; Crypto Security, which protects cryptographic keys and algorithms; and Transmission Security, which safeguards data as it travels over networks. A concrete example is storing sensitive documents in a locked cabinet inside a secured room to prevent an unauthorized person from observing or taking them.

The main idea is using physical controls to keep assets from being seen or accessed by someone unauthorized. Physical security covers the measures that prevent visual observation or direct tampering—like locked spaces, access-controlled doors, privacy screens, and guards—so only approved individuals can see or handle sensitive items. This is different from Emission Security, which aims to stop unintended electronic emissions from revealing information; Crypto Security, which protects cryptographic keys and algorithms; and Transmission Security, which safeguards data as it travels over networks. A concrete example is storing sensitive documents in a locked cabinet inside a secured room to prevent an unauthorized person from observing or taking them.