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Which of the following intrusion detection systems is the most appropriate for protecting the painting?

Sarah recently learned that the painting she inherited from a relative and hung in her downtown coffee shop is worth a lot of money. She is worried about its protection and wants to install an IDS. Which of the following intrusion detection systems is the most appropriate for protecting the painting?

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A.
Acoustical detection system

B.
Proximity detector

C.
Photoelectric system

D.
Vibration sensor

Explanation:
B: Proximity detectors, or capacitance detectors, are usually used to protect specific objects (artwork, cabinets, or a safe) versus protecting a whole room or
area. A proximity detector emits and monitors a measurable magnetic field. If the field is disrupted, the detector sounds an alarm to alert a responsible entity of a
possible intrusion. All IDSs are support mechanisms that are intended to detect and announce an attempted intrusion. They will not prevent or apprehend
intruders, so they should be seen as an aid to the organization’s security forces. While an IDS is a very valuable control, the technology is expensive and the
system requires a redundant power supply and emergency backup power.
A is incorrect because an acoustical detection system, although easy to install, is very sensitive and cannot be used in areas open to sounds of storms or traffic.
An acoustical detection system uses microphones installed on floors, walls, or ceilings. The goal is to detect any sound made during a forced entry.
C is incorrect because a photoelectric system cannot be used in a room with windows. A photoelectric system triggers an alarm when it detects changes in a
light beam that is emitted. The beams can be visible or invisible. Photoelectric systems are commonly used in museums to protect works of art. If a visitor attempts
to cross a room to steal a priceless sculpture, a beam will be broken and an alarm will sound.
D is incorrect because, similar to an acoustical detection system, vibration sensors are sensitive to things like traffic and storms that could cause false positives.
A vibration sensor senses vibrations in walls and floors. Financial institutions may choose to implement them on exterior walls where bank robbers may attempt to
drive a vehicle through. They are also commonly used around the ceiling and flooring of vaults to detect someone attempting to break in.

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