Master Key System Architecture Flashcards
7 cards from real CPL practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Master Key System Architecture flashcards as text
What is a 'grand master key' (GMK) in a master key system?
Answer: The key at the top of the hierarchy that operates all locks in the entire system
The grand master key (GMK) sits at the apex of a multi-level master key system and is designed to operate every lock within the entire system.
When a locksmith says a master key system uses 'progression,' what does this mean?
Answer: The key bittings are assigned sequentially using defined increments across cut positions
Progression assigns key bittings by systematically incrementing cut depths across positions according to a defined pattern, ensuring all combinations are methodically covered.
What is the function of a 'key control' policy in a master key system?
Answer: Preventing unauthorized key duplication and tracking key issuance
Key control policies govern who receives keys, restrict duplication to authorized sources, and maintain records to track every key in the system.
In a restricted keyway master key system, what is the primary security advantage over a standard keyway system?
Answer: Key blanks are proprietary and cannot be duplicated on standard equipment without authorization
Restricted keyways use patented or proprietary blank profiles controlled by the manufacturer or authorized distributor, preventing unauthorized duplication.
A locksmith is asked to expand an existing master key system. What is the first step recommended before adding new cylinders?
Answer: Obtain and review the original bitting list to avoid cross-keying conflicts
Reviewing the original bitting list before expansion ensures new key bittings are chosen to avoid duplicating or conflicting with existing combinations.
What is 'key interchange' in a master key system?
Answer: The unintended ability of one change key to operate another change key's lock
Key interchange is another term for cross-keying, where a change key unintentionally operates a lock it was not intended to open.
Which type of master key system is most appropriate for a hospital where different staff groups need access to different areas but a single master is needed for emergencies?
Answer: Grand master key system with multiple sub-master levels
A grand master key system with sub-master levels allows department heads to hold sub-master keys for their areas while administration holds the GMK for emergency access to all areas.