Automotive Security & Vehicle Lock Forensics Flashcards

What is the primary security function of a transponder chip embedded in an automotive ignition key?

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.

Which type of automotive lock mechanism uses flat, spring-loaded wafers as its primary tumbler components?

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.

In forensic locksmithing, what technique involves manipulating a key blank inside a lock to create a functional working key without the original?

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.

What is a 'steering column attack' in the context of automotive forensic investigation?

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.

A 'valet key' in an automotive security system is specifically designed to do which of the following?

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.

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?

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.

Which automotive security system component specifically prevents the engine from running unless it receives an authenticated signal from the ignition key?

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.