CFL Security System Analysis 3

Question 1

A commercial property uses an electromagnetic lock (magloc) on a door. During forensic analysis, what failure mode would indicate the lock was defeated electrically rather than mechanically?

Accepted Answer

Cut or bypassed wiring at the power supply

Answer

Maglocks require continuous power; cutting or bypassing the power supply will release the lock without leaving mechanical evidence on the door or hardware.

Question 2

In security system analysis, what is 'defense in depth'?

Accepted Answer

Implementing multiple overlapping security layers so each layer compensates for weaknesses in others

Answer

Defense in depth uses multiple security layers—physical, electronic, and procedural—so that defeating one layer does not compromise the entire system.

Question 3

A forensic examination reveals that a motion detector was covered with a bag during a burglary. What category of attack does this represent?

Accepted Answer

Physical masking/defeating of a sensor

Answer

Physically obstructing a PIR or microwave motion sensor by covering it is classified as a physical masking attack on the detection layer.

Question 4

Which type of glass break detector is MOST susceptible to defeat by slowly cutting glass rather than breaking it?

Accepted Answer

Acoustic-only glass break detector

Answer

Acoustic-only glass break detectors listen for the high-frequency sound of shattering glass and will not trigger when glass is slowly cut with a glass cutter.

Question 5

What is the forensic significance of a 'walk test' mode being active on an alarm system at the time of a burglary?

Accepted Answer

Walk test mode may disable central station reporting, preventing alarm transmission

Answer

Walk test mode is used for sensor testing and typically suppresses central station notifications, which could be deliberately exploited to prevent alarm reporting.

(CFL) Certified Forensic Locksmith Practice Test

(CFL) Certified Forensic Locksmith Practice Test

CFL Security System Analysis 3