Masking is defined as?

• A. Replacing a sensor without powering down
• B. When someone attempts to blind a sensor when the system is unset by placing objects in its field of view or by spraying it with paint
• C. Encrypting sensor data
• D. Labeling sensors for inventory

Answer: (B)

Masking is a form of sensor tampering where someone tries to render a sensor ineffective by blocking its view. When the system is not armed, an intruder might place objects in the sensor’s field of view or spray it with paint to obscure detection. This directly defeats the sensor’s ability to detect motion, presence, or other signals, which is the core idea behind masking.

The other options describe different ideas that don’t match this tampering concept: replacing a sensor without powering down is about hardware replacement, encrypting sensor data is about data security, and labeling sensors for inventory is asset management.