Key Systems & Key Control Flashcards

What does 'total position change' (TPC) refer to in key system design?

Answer: The number of unique change keys possible in a system

Total position change (TPC) is the total number of unique individual change key combinations available in a master key system.

A key system that uses rotating elements rather than traditional pin tumblers for higher security is best described as a:

Answer: Disc detainer system

Disc detainer locks use rotating disc elements that must align precisely, offering high pick resistance and key control.

In key system terminology, what is a 'keyway'?

Answer: The profile cut into the cylinder plug that accepts a specific key blade shape

The keyway is the shaped opening in the cylinder plug that matches the corresponding key blank profile, controlling which blanks can enter.

What is the function of a 'control key' in a proprietary cylinder system?

Answer: It allows removal of the core from the cylinder for rekeying

A control key is used in interchangeable core (IC) systems to remove or insert the core, enabling rapid rekeying without tools.

Which ANSI/BHMA grade rating indicates the highest performance level for locks used in key control systems?

Answer: Grade 1

ANSI/BHMA Grade 1 is the highest rating, indicating heavy-duty commercial performance and the strongest security standards.

In a key system, what does 'masting' refer to?

Answer: Adding an additional master wafer or pin to a lock so it operates on a master key

Masting a lock involves adding master wafers or pins so it can be operated by both its change key and a master key.

What is the purpose of a 'key cabinet' in a key control program?

Answer: To securely store and organize keys with controlled access and audit capability

A key cabinet provides secure, organized storage for keys with access logging to enforce accountability in a key control program.