Key control

Key control refers to various methods for making sure that certain keys are only used by authorized people. This is especially important for master key systems with many users.^[1] A system of key control includes strategies for keeping track of which keys are carried by which people, as well as strategies to prevent people from giving away copies of the keys to unauthorized users. The former may be as simple as assigning someone the job of keeping an up-to-date list on paper. A more complex system may require signatures and/or a monetary deposit.

Levels

Preventing unauthorized copies typically falls into one of the following five levels.

Level 5 (lowest): ordinary unrestricted keys. This level relies on the honor system. Users are instructed not to make copies or loan keys and trusted to comply. This is common for private residences.
Level 4 (low): unrestricted keys marked "Do Not Duplicate". These keys can theoretically be copied anywhere, but many stores will refuse to copy them. This is a very low-level deterrent which ALOA calls "deceptive because it provides a false sense of security".^[2]
Level 3 (medium): restricted keys. These keys are not generally available at retail outlets and often can only be obtained through a single source. The supplier has their own rules in place to prevent unauthorized duplication.
Level 2 (high): patented keys. By definition, patented keys are restricted. They also have the added feature of being protected by patent law. Anyone who sells such a key without permission of the patent holder could face financial penalties.
Level 1 (highest): factory-only patented keys. These keys cannot be cut locally. In addition to the restrictions above, users must send an authorization request to the factory to have additional keys cut and strict records are kept of each key.

None of these levels can protect against a user who loans a key to someone else and then falsely claims that the key was lost.^[3] Additional methods of key control include mechanical or electronic means. Electronic key control systems use serialized key assignments housed in a centralized database to allow for better tracking of each key made.^[4]

References

^ "Key Control - SARGENT". Sargentlock.com. Retrieved 2012-08-13.
^ "The Associated Locksmiths of America Technical Standards Policy" (PDF). Aloa.org. Archived from the original (PDF) on 12 May 2008. Retrieved 2013-10-23.
^ "Key Access Control Security, Electronic Key Management Systems, Cabinet Keys". Keytracer.com. Archived from the original on 2012-08-30. Retrieved 2012-08-13.
^ Carter, Ryan (2016). "How Simple Key Control Benefits Retail Store Operations" (PDF). Instakey Security Systems. Retrieved 10 March 2023.

[1] "Key Control - SARGENT". Sargentlock.com. Retrieved 2012-08-13.

[2] "The Associated Locksmiths of America Technical Standards Policy" (PDF). Aloa.org. Archived from the original (PDF) on 12 May 2008. Retrieved 2013-10-23.

[3] "Key Access Control Security, Electronic Key Management Systems, Cabinet Keys". Keytracer.com. Archived from the original on 2012-08-30. Retrieved 2012-08-13.

[4] Carter, Ryan (2016). "How Simple Key Control Benefits Retail Store Operations" (PDF). Instakey Security Systems. Retrieved 10 March 2023.

[1]

[2]

[3]

[4]

v t e Locks, locksmithing, lock picking, and security alarms
Fundamental concepts	Access control Authentication Key control Key duplication Key relevance Master keying Password Physical security Rekeying
Lock hardware	Bitting Interchangeable core Key blank Key code Key retainer Lockrod Lockset Bored cylindrical lock Mortise lock Rim lock Single-point locking Three-point locking
Keys	Berlin key Car key Keychain Skeleton key Smart key
Mechanical locks	Warded lock Pin tumbler lock Disc tumbler lock Lever tumbler lock Magnetic keyed lock Padlock Combination lock Rotary combination lock Time-delay combination locks Time lock Tubular pin tumbler lock Wafer tumbler lock
Electronic locks	Electromagnetic lock Electronic lock Electric strike Keycard lock
Other lock types	Arrow lock Bicycle lock Bramah lock Chubb detector lock Child safety lock Kensington Security Slot Latch Luggage lock Power door locks Protector lock Real-estate lock box Steering-wheel lock The Club
Lock picking	Lock bumping Locksport Slim Jim Snap gun
Door hardware	Dead bolt Door chain Door closer Door frame Door furniture Door handle Door security Doorstop Hinge Night latch
Emergency access/exit	Crash bar Electromagnetic door holder Emergency exit Emergency light Exit control lock Exit sign Knox Box
Security alarms	Alarm device Alarm monitoring center Car alarm Card reader Closed-circuit television Door loop Dual loop Fingerprint scanner Glass break detector Heat detector Key switch Keypad Miniature snap-action switch Motion detector Occupancy sensor Passive infrared sensor (PIR) Perimeter intrusion detection Photoelectric sensor Piezo switch Pressure switch Proximity card Reed switch Tripwire Ultrasonic transducer Vandal-resistant switch Water detector Window security
Miscellaneous	Glossary of locksmithing terms John M. Mossman Lock Museum Key to the City Lock Museum Lock Museum of America Musée de la Serrure Puzzle lock
Category:Locksmithing Keys Locks Book