Master key - Revision history

Sandplum: /* Master Keying Schemes */ chart of obverse keyways

2021-06-25T20:22:44Z

Master Keying Schemes: chart of obverse keyways

← Older revision		Revision as of 20:22, 25 June 2021
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	: A method of master keying in which some positions are progressed and at least one position is held constant but the location of the constant is not fixed. This method is very useful for producing two-level systems with large numbers of [[change key\|change keys]]. Surprisingly, it produces ''more'' available change keys than total position progression does, in most cases. As with partial position progression, every key has at least one cut in common with the top master key and most locks have at least one [[chamber]] with no master pins in it.		: A method of master keying in which some positions are progressed and at least one position is held constant but the location of the constant is not fixed. This method is very useful for producing two-level systems with large numbers of [[change key\|change keys]]. Surprisingly, it produces ''more'' available change keys than total position progression does, in most cases. As with partial position progression, every key has at least one cut in common with the top master key and most locks have at least one [[chamber]] with no master pins in it.

			[[File:Obverse_keyway_chart.png \|right\|thumb]]
	; [[Sectional keyway\|Sectional/Multiplex Keyways]]		; [[Sectional keyway\|Sectional/Multiplex Keyways]]
	: A master keying scheme where the keyway profile of a key is used to restrict physical entry of the key to one or more locks. Keys with low levels of access will have key profiles that cannot be inserted into higher level locks. Keys with high levels of access will have most of their warding removed, allowing them to be used in all or most locks in the system. This scheme is most commonly used in addition to traditional master keying schemes, but may be used alone. In [[warded]] locks, sectional keyways may be the only type of master keying available.		: A master keying scheme where the keyway profile of a key is used to restrict physical entry of the key to one or more locks. Keys with low levels of access will have key profiles that cannot be inserted into higher level locks. Keys with high levels of access will have most of their warding removed, allowing them to be used in all or most locks in the system. This scheme is most commonly used in addition to traditional master keying schemes, but may be used alone. In [[warded]] locks, sectional keyways may be the only type of master keying available.

Sandplum: /* See also */ added category:locksmithing, added decoding, 156.68, interchangeable core, removed combination

2021-06-25T17:30:54Z

See also: added category:locksmithing, added decoding, 156.68, interchangeable core, removed combination

← Older revision		Revision as of 17:30, 25 June 2021
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	* [[Key]]		* [[Key]]
	* [[Combination]]
	* [[Lock]]		* [[Lock]]
			* [[Decoding]]
			* [[156.68]]
			* [[Interchangeable core]]


	[[Category:Keys]]		[[Category:Keys]]
			[[Category:Locksmithing]]
	[[Category:Master keying\| ]]		[[Category:Master keying\| ]]

Sandplum: added video link

2021-06-25T13:32:47Z

added video link

← Older revision		Revision as of 13:32, 25 June 2021
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	: Traditional rotary combination locks can have have multiple true gates per wheel, allowing various combinations to be used. The majority of combination locks do not allow master keying without the addition of an auxillary override lock. [[Electronic_lock\|Electronic]] combination locks can store a database of valid combinations for different users.		: Traditional rotary combination locks can have have multiple true gates per wheel, allowing various combinations to be used. The majority of combination locks do not allow master keying without the addition of an auxillary override lock. [[Electronic_lock\|Electronic]] combination locks can store a database of valid combinations for different users.

	; [[Disc-detainer]]		; [[Disc_detainer\|Disc-detainer]]
	: Widened or additional true gates on the discs themselves can allow master keying. The high number of key differs in most disc-detainer locks minimizes the threat of [[key interchange]] in most systems.		: Widened or additional true gates on the discs themselves can allow master keying. The high number of key differs in most disc-detainer locks minimizes the threat of [[key interchange]] in most systems.

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	: Various modifications to the levers themselves can allow master keying but most have an adverse effect on security. The majority of real-world lever locks that need to provide master keying do so by providing two keyholes with two sets of levers, or two keyholes with a single set of levers, each lever having two contact points.		: Various modifications to the levers themselves can allow master keying but most have an adverse effect on security. The majority of real-world lever locks that need to provide master keying do so by providing two keyholes with two sets of levers, or two keyholes with a single set of levers, each lever having two contact points.

	; [[Pin-tumbler]]		; [[Pin_tumbler\|Pin-tumbler]]
	: Additional, smaller [[master pin\|master pins]] inserted between the top and bottom pins of each pin tumbler stack allows for additional potential [[Shear_line\|shear lines]]. This so-called "split pin master keying" provides one of the most versatile master keying solutions. As more master pins are added, the chance of key interchange increases exponentially.		: Additional, smaller [[master pin\|master pins]] inserted between the top and bottom pins of each pin tumbler stack allows for additional potential [[Shear_line\|shear lines]]. This so-called "split pin master keying" provides one of the most versatile master keying solutions. As more master pins are added, the chance of key interchange increases exponentially.

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	; [[Total position progression\|Total Position Progression]]		; [[Total position progression\|Total Position Progression]]
	: A method of master keying in which every position is progressed. With split-pin master keying, this means the lowest level change keys share no cuts in common with the top master key and most locks have a master pin in every chamber. This method is useful for producing systems with many levels of keying. Some consider it to be the default method to be used in every situation but it creates excessive incidental keys, which is contrary to ANSI standards.		: A method of master keying in which every position is progressed. With split-pin master keying, this means the lowest level change keys share no cuts in common with the top master key and most locks have a master pin in every chamber. This method is useful for producing systems with many levels of keying. Some consider it to be the default method to be used in every situation but it creates excessive incidental keys, which is contrary to ANSI standards.

			==External links==
			* [https://www.youtube.com/watch?v=mTVbGeD0wQM&t=0s Jos Weyers "Attacking Masterkeyed Systems (the Easy Way)"] (video)

	==See also==		==See also==

75.170.78.88: /* Master Keying Schemes */ fixed two minor mistakes regarding sectional master keying

2012-03-24T16:23:34Z

Master Keying Schemes: fixed two minor mistakes regarding sectional master keying

← Older revision		Revision as of 16:23, 24 March 2012
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	; [[Sectional keyway\|Sectional/Multiplex Keyways]]		; [[Sectional keyway\|Sectional/Multiplex Keyways]]
	: A master keying scheme where the keyway profile of a key is used to restrict physical entry of the key to one or more locks. Keys with low levels of access will have key profiles that cannot be inserted into higher level locks. ~~Locks~~ with high levels of access will have most of their warding removed, allowing them to be used in all or most locks in the system. This scheme is most commonly used in addition to traditional master keying schemes, but may be used alone. In [[warded]] locks, sectional keyways ~~are~~ the only type of master keying available.		: A master keying scheme where the keyway profile of a key is used to restrict physical entry of the key to one or more locks. Keys with low levels of access will have key profiles that cannot be inserted into higher level locks. Keys with high levels of access will have most of their warding removed, allowing them to be used in all or most locks in the system. This scheme is most commonly used in addition to traditional master keying schemes, but may be used alone. In [[warded]] locks, sectional keyways may be the only type of master keying available.

	; [[Total position progression\|Total Position Progression]]		; [[Total position progression\|Total Position Progression]]

75.170.78.88: /* Master Key Lock Designs */ clarified the description for pin-tumbler master keying

2012-03-24T16:19:23Z

Master Key Lock Designs: clarified the description for pin-tumbler master keying

← Older revision		Revision as of 16:19, 24 March 2012
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	; [[Disc-detainer]]		; [[Disc-detainer]]
	: Widened or additional true gates on the discs themselves can allow master keying. The high number of key differs in most disc-detainer locks minimizes the threat of key interchange in most systems.		: Widened or additional true gates on the discs themselves can allow master keying. The high number of key differs in most disc-detainer locks minimizes the threat of [[key interchange]] in most systems.

	; [[Lever]]		; [[Lever]]
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	; [[Pin-tumbler]]		; [[Pin-tumbler]]
	: ~~Adding additional~~, smaller pins between the top and bottom pins of each pin tumbler stack allows for additional [[Shear_line\|shear lines]] ~~to be created~~. ~~Pin~~-~~tumblers provide~~ one of the most versatile master keying solutions.		: Additional, smaller [[master pin\|master pins]] inserted between the top and bottom pins of each pin tumbler stack allows for additional potential [[Shear_line\|shear lines]]. This so-called "split pin master keying" provides one of the most versatile master keying solutions. As more master pins are added, the chance of key interchange increases exponentially.

	; [[Wafer]]		; [[Wafer]]

75.170.78.88: /* Master Keying Schemes */ fixed a typo

2012-03-24T16:09:22Z

Master Keying Schemes: fixed a typo

← Older revision		Revision as of 16:09, 24 March 2012
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	; [[Rotating constant progression_System\|Rotating Constant Progression System]]		; [[Rotating constant progression_System\|Rotating Constant Progression System]]
	: A method of master keying in which some positions are progressed and at least one ~~positions~~ is held constant but the location of the constant is not fixed. This method is very useful for producing two-level systems with large numbers of [[change key\|change keys]]. Surprisingly, it produces ''more'' available change keys than total position progression does, in most cases. As with partial position progression, every key has at least one cut in common with the top master key and most locks have at least one [[chamber]] with no master pins in it.		: A method of master keying in which some positions are progressed and at least one position is held constant but the location of the constant is not fixed. This method is very useful for producing two-level systems with large numbers of [[change key\|change keys]]. Surprisingly, it produces ''more'' available change keys than total position progression does, in most cases. As with partial position progression, every key has at least one cut in common with the top master key and most locks have at least one [[chamber]] with no master pins in it.

	; [[Sectional keyway\|Sectional/Multiplex Keyways]]		; [[Sectional keyway\|Sectional/Multiplex Keyways]]

75.170.78.88: /* Master Keying Schemes */ added descriptions of rotating constant, partial-, and total- position progression

2012-03-24T16:05:57Z

Master Keying Schemes: added descriptions of rotating constant, partial-, and total- position progression

← Older revision		Revision as of 16:05, 24 March 2012
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	; [[Partial position progression\|Partial Position Progression]]		; [[Partial position progression\|Partial Position Progression]]
	: ~~Add to me!~~		: A method of master keying in which certain positions are progressed while other positions are held constant. With split-pin master keying, this means there are certain cuts on the keys which are the same on every key in the entire system and there are certain chambers in the locks which never have master pins in them. This method is very useful for small systems.

	; [[Rotating constant progression_System\|Rotating Constant Progression System]]		; [[Rotating constant progression_System\|Rotating Constant Progression System]]
	: ~~Add to me!~~		: A method of master keying in which some positions are progressed and at least one positions is held constant but the location of the constant is not fixed. This method is very useful for producing two-level systems with large numbers of [[change key\|change keys]]. Surprisingly, it produces ''more'' available change keys than total position progression does, in most cases. As with partial position progression, every key has at least one cut in common with the top master key and most locks have at least one [[chamber]] with no master pins in it.

	; [[Sectional keyway\|Sectional/Multiplex Keyways]]		; [[Sectional keyway\|Sectional/Multiplex Keyways]]
Line 53:		Line 53:

	; [[Total position progression\|Total Position Progression]]		; [[Total position progression\|Total Position Progression]]
	: ~~Add~~ to ~~me!~~		: A method of master keying in which every position is progressed. With split-pin master keying, this means the lowest level change keys share no cuts in common with the top master key and most locks have a master pin in every chamber. This method is useful for producing systems with many levels of keying. Some consider it to be the default method to be used in every situation but it creates excessive incidental keys, which is contrary to ANSI standards.

	==See also==		==See also==

Datagram: Reverted edits by Nickinator (Talk) to last revision by Datagram

2011-07-08T15:30:03Z

Reverted edits by Nickinator (Talk) to last revision by Datagram

← Older revision		Revision as of 15:30, 8 July 2011
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	: A movable or breakable component is added to the traditional locking components. During "construction", users use keys that raise these components to the [[shear line]]. When the lock is ready to be used by the real owners, the components are removed or otherwise damaged so that the old keys no longer work. Construction keying is primarily used with [[pin-tumbler]] locks, though break-away components can be used with other designs, as well.		: A movable or breakable component is added to the traditional locking components. During "construction", users use keys that raise these components to the [[shear line]]. When the lock is ready to be used by the real owners, the components are removed or otherwise damaged so that the old keys no longer work. Construction keying is primarily used with [[pin-tumbler]] locks, though break-away components can be used with other designs, as well.

	; [[Interchangeable ~~Core~~]]		; [[Interchangeable core\|Interchangeable Cores]]
	: A lock that allows user-rekeying by physically removing the [[cylinder]] and replacing it with another. Interchangeable core locks usually feature two [[shear line]]s which operate independent of one another. One shear line is used to engage the [[bolt]] mechansism, and the other to operate the core removal mechanism.		: A lock that allows user-rekeying by physically removing the [[cylinder]] and replacing it with another. Interchangeable core locks usually feature two [[shear line]]s which operate independent of one another. One shear line is used to engage the [[bolt]] mechansism, and the other to operate the core removal mechanism.

Nickinator: Chaged link to Interchangeable Core page.

2011-07-08T13:20:19Z

Chaged link to Interchangeable Core page.

← Older revision		Revision as of 13:20, 8 July 2011
Line 34:		Line 34:
	: A movable or breakable component is added to the traditional locking components. During "construction", users use keys that raise these components to the [[shear line]]. When the lock is ready to be used by the real owners, the components are removed or otherwise damaged so that the old keys no longer work. Construction keying is primarily used with [[pin-tumbler]] locks, though break-away components can be used with other designs, as well.		: A movable or breakable component is added to the traditional locking components. During "construction", users use keys that raise these components to the [[shear line]]. When the lock is ready to be used by the real owners, the components are removed or otherwise damaged so that the old keys no longer work. Construction keying is primarily used with [[pin-tumbler]] locks, though break-away components can be used with other designs, as well.

	; [[Interchangeable ~~core\|Interchangeable Cores~~]]		; [[Interchangeable Core]]
	: A lock that allows user-rekeying by physically removing the [[cylinder]] and replacing it with another. Interchangeable core locks usually feature two [[shear line]]s which operate independent of one another. One shear line is used to engage the [[bolt]] mechansism, and the other to operate the core removal mechanism.		: A lock that allows user-rekeying by physically removing the [[cylinder]] and replacing it with another. Interchangeable core locks usually feature two [[shear line]]s which operate independent of one another. One shear line is used to engage the [[bolt]] mechansism, and the other to operate the core removal mechanism.

Datagram at 16:35, 21 October 2010

2010-10-21T16:35:47Z

← Older revision		Revision as of 16:35, 21 October 2010
Line 49:		Line 49:
	: Add to me!		: Add to me!

	; [[Sectional ~~keyways~~\|Sectional/Multiplex Keyways]]		; [[Sectional keyway\|Sectional/Multiplex Keyways]]
	: A master keying scheme where the keyway profile of a key is used to restrict physical entry of the key to one or more locks. Keys with low levels of access will have key profiles that cannot be inserted into higher level locks. Locks with high levels of access will have most of their warding removed, allowing them to be used in all or most locks in the system. This scheme is most commonly used in addition to traditional master keying schemes, but may be used alone. In [[warded]] locks, sectional keyways are the only type of master keying available.		: A master keying scheme where the keyway profile of a key is used to restrict physical entry of the key to one or more locks. Keys with low levels of access will have key profiles that cannot be inserted into higher level locks. Locks with high levels of access will have most of their warding removed, allowing them to be used in all or most locks in the system. This scheme is most commonly used in addition to traditional master keying schemes, but may be used alone. In [[warded]] locks, sectional keyways are the only type of master keying available.

← Older revision		Revision as of 16:09, 24 March 2012
Line 47:		Line 47:

	; [[Rotating constant progression_System\|Rotating Constant Progression System]]		; [[Rotating constant progression_System\|Rotating Constant Progression System]]
	: A method of master keying in which some positions are progressed and at least one ~~positions~~ is held constant but the location of the constant is not fixed. This method is very useful for producing two-level systems with large numbers of [[change key\|change keys]]. Surprisingly, it produces ''more'' available change keys than total position progression does, in most cases. As with partial position progression, every key has at least one cut in common with the top master key and most locks have at least one [[chamber]] with no master pins in it.		: A method of master keying in which some positions are progressed and at least one position is held constant but the location of the constant is not fixed. This method is very useful for producing two-level systems with large numbers of [[change key\|change keys]]. Surprisingly, it produces ''more'' available change keys than total position progression does, in most cases. As with partial position progression, every key has at least one cut in common with the top master key and most locks have at least one [[chamber]] with no master pins in it.

	; [[Sectional keyway\|Sectional/Multiplex Keyways]]		; [[Sectional keyway\|Sectional/Multiplex Keyways]]