CFL Automotive Security & Vehicle Lock Forensics 1 — Questions and Answers
Question 1: What is the primary security function of a transponder chip embedded in an automotive ignition key?
- To prevent radio interference with the engine control unit
- To authenticate the key and permit the engine to start (Correct answer)
- To control the vehicle's emission monitoring systems
- To track the vehicle's location via GPS
Correct answer: To authenticate the key and permit the engine to start
The transponder chip communicates a unique rolling or fixed code to the vehicle's ECU, and the engine will not start unless the correct code is received.
Question 2: Which type of automotive lock mechanism uses flat, spring-loaded wafers as its primary tumbler components?
- Disc detainer lock
- Sidebar lock
- Wafer tumbler lock (Correct answer)
- Pin tumbler lock
Correct answer: Wafer tumbler lock
Wafer tumbler locks use thin, flat wafers that must all align at the shear line simultaneously to allow cylinder rotation, and are commonly found in older vehicle door and ignition locks.
Question 3: In forensic locksmithing, what technique involves manipulating a key blank inside a lock to create a functional working key without the original?
- Decoding
- Impressioning (Correct answer)
- Bumping
- Raking
Correct answer: Impressioning
Impressioning is the process of inserting a blank key, applying tension and motion so the tumblers mark the blank, then filing it based on those marks until a working key is produced.
Question 4: What is a 'steering column attack' in the context of automotive forensic investigation?
- A collision damage assessment method for insurance purposes
- A method of bypassing the ignition lock by physically destroying the steering column housing (Correct answer)
- A steering wheel alignment diagnostic procedure
- A method of disabling the power steering pump electronically
Correct answer: A method of bypassing the ignition lock by physically destroying the steering column housing
A steering column attack involves breaking or stripping the plastic or metal steering column housing to expose and bypass the ignition lock cylinder without a key.
Question 5: A 'valet key' in an automotive security system is specifically designed to do which of the following?
- Provide unlimited vehicle access to parking attendants at all times
- Start the engine and open doors while restricting access to locked storage areas (Correct answer)
- Operate only the trunk release and fuel door mechanisms
- Allow access to vehicle emergency functions only
Correct answer: Start the engine and open doors while restricting access to locked storage areas
A valet key allows parking attendants to drive and access the vehicle while preventing entry into locked storage areas such as the trunk and glove compartment.
Question 6: During forensic examination of an automotive lock cylinder, what mark pattern would most strongly suggest the use of a pick tool rather than an original key?
- Smooth, polished internal surfaces with no scratches
- Wear marks consistent with the manufacturer's key cut tolerances
- Fine scratches on the tumblers at irregular heights inconsistent with any single key (Correct answer)
- Uniform wear at only the correct key contact positions on each tumbler
Correct answer: Fine scratches on the tumblers at irregular heights inconsistent with any single key
Lock picking creates fine scratches on tumblers at varying heights as the pick manipulates each tumbler independently, unlike normal key use which creates consistent wear only at the correct cut position.
Question 7: Which automotive security system component specifically prevents the engine from running unless it receives an authenticated signal from the ignition key?
- Door lock actuator module
- Vehicle immobilizer system (Correct answer)
- Central body control module
- Remote keyless entry receiver
Correct answer: Vehicle immobilizer system
The immobilizer system uses the ECU to electronically disable critical engine functions (fuel, ignition) unless it first authenticates the transponder signal from the key.
CFL Automotive Security & Vehicle Lock Forensics 1
What is the primary security function of a transponder chip embedded in an automotive ignition key?