Medeco Biaxial - Revision history

Sandplum: corrected plug measurement

2023-03-04T12:31:13Z

corrected plug measurement

← Older revision		Revision as of 12:31, 4 March 2023
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	== Disassembly instructions ==		== Disassembly instructions ==

	Disassembly of the Biaxial is simplified compared to other sidebar-based locks because there are no additional finger pins used in the sidebar. The diameter of the plug is 12.~~62mm~~.		Disassembly of the Biaxial is simplified compared to other sidebar-based locks because there are no additional finger pins used in the sidebar. The diameter of the plug is 12.966mm.

	{{Pin-tumbler standard disassembly}}		{{Pin-tumbler standard disassembly}}

Sandplum: added plug diameter, spec

2023-03-04T10:44:13Z

added plug diameter, spec

← Older revision		Revision as of 10:44, 4 March 2023
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	\| maker = [[Medeco]]		\| maker = [[Medeco]]
	\| lock_type = [[Cylinder]]		\| lock_type = [[Cylinder]]
	\| lock_design = [[Pin-tumbler]], [[Sidebar]]		\| lock_design = [[Pin_tumbler \|Pin-tumbler]], [[Sidebar]]
	\| years_produced = 1985-present		\| years_produced = 1985-present
	\| patent = [https://patents.google.com/patent/US4635455A/ US 4,635,455]		\| patent = [https://patents.google.com/patent/US4635455A/ US 4,635,455]
	\| related = [[Medeco Original]]<br>[[Medeco M3]]<br>[[Medeco Duracam]]		\| related = [[Medeco Original]]<br>[[Medeco M4]]<br>[[Medeco Duracam]]
			\| spec_on = true
			\| spec_comptype = [[Pin_tumbler \|Pin-tumbler]]
			\| spec_comp = 5 or 6
	}}		}}

	The '''Biaxial''' is a [[UL 437]] rated [[pin-tumbler]] lock made by [[Medeco]]. It is well known for the use of rotating bottom (key) pins that interface with a [[sidebar]]. The Biaxial is one of the most widely used American [[high security locks]]. It was previously thought to be one of the most secure locks available, but continued research from the [[locksport]] community has proven a variety of attacks are possible, including [[key bumping]].		The '''Biaxial''' is a [[UL 437]]-rated [[Pin_tumbler \|pin-tumbler]] lock made by [[Medeco]]. It is well known for the use of rotating bottom (key) pins that interface with a [[sidebar]]. The Biaxial is one of the most widely used American [[high security locks]]. It was previously thought to be one of the most secure locks available, but continued research from the [[locksport]] community has proven a variety of attacks are possible, including [[key bumping]].

	The Biaxial is a newer version of the [[Medeco Original]] and has since been superseded by the [[Medeco M3]]. The [[Medeco Duracam]] is a [[dimple]] lock form of the Biaxial.		The Biaxial is a newer version of the [[Medeco Original]] and has since been superseded by the [[Medeco M3]]. The [[Medeco Duracam]] is a [[dimple]] lock form of the Biaxial.
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	== Disassembly instructions ==		== Disassembly instructions ==

	Disassembly of the Biaxial is simplified compared to other sidebar-based locks because there are no additional finger pins used in the sidebar.		Disassembly of the Biaxial is simplified compared to other sidebar-based locks because there are no additional finger pins used in the sidebar. The diameter of the plug is 12.62mm.

	{{Pin-tumbler standard disassembly}}		{{Pin-tumbler standard disassembly}}
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	* [[Medeco]]		* [[Medeco]]
	* [[Pin-tumbler]]		* [[Pin_tumbler \|Pin-tumbler]]
	* [[Sidebar]]		* [[Sidebar]]

Datagram at 21:34, 3 February 2021

2021-02-03T21:34:44Z

← Older revision		Revision as of 21:34, 3 February 2021
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	\| lock_design = [[Pin-tumbler]], [[Sidebar]]		\| lock_design = [[Pin-tumbler]], [[Sidebar]]
	\| years_produced = 1985-present		\| years_produced = 1985-present
	\| patent = [~~http~~://~~www~~.google.com/~~patents~~/~~about?id=MVY1AAAAEBAJ~~ US 4,635,455]		\| patent = [https://patents.google.com/patent/US4635455A/ US 4,635,455]
	\| related = [[Medeco Original]]<br>[[Medeco M3]]<br>[[Medeco Duracam]]		\| related = [[Medeco Original]]<br>[[Medeco M3]]<br>[[Medeco Duracam]]
	}}		}}

Nerixel: Updated Medecoder reference link to what seems to be the new URL. Link changed 08/08/2017.

2019-02-03T17:07:13Z

Updated Medecoder reference link to what seems to be the new URL. Link changed 08/08/2017.

← Older revision		Revision as of 17:07, 3 February 2019
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	'''Notes'''		'''Notes'''
	* The validity of key bumping attacks against Medeco cylinders has been debated between Medeco and the [[locksport]] community. Research done by [[Marc Weber Tobias]] and Tobias Bluzmanis has shown these systems are vulnerable to a wide variety of attacks, including bumping.		* The validity of key bumping attacks against Medeco cylinders has been debated between Medeco and the [[locksport]] community. Research done by [[Marc Weber Tobias]] and Tobias Bluzmanis has shown these systems are vulnerable to a wide variety of attacks, including bumping.
	* Lockpicking attacks against this lock were previously thought extremely difficult due to axial rotation. A tool called the "Medecoder", developed by Jon King, made this process much easier and at the same time allowed for decoding of the sidebar code.<ref>King, Jon. [http://www.theamazingking.com/medecoder.~~html~~ The Amazing King - Medecoder]</ref>		* Lockpicking attacks against this lock were previously thought extremely difficult due to axial rotation. A tool called the "Medecoder", developed by Jon King, made this process much easier and at the same time allowed for decoding of the sidebar code.<ref>King, Jon. [http://www.theamazingking.com/medecoder.php The Amazing King - Medecoder]</ref>

	== Gallery ==		== Gallery ==

JasonAller: linked Marc Weber Tobias

2010-12-04T02:42:24Z

linked Marc Weber Tobias

← Older revision		Revision as of 02:42, 4 December 2010
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	'''Notes'''		'''Notes'''
	* The validity of key bumping attacks against Medeco cylinders has been debated between Medeco and the [[locksport]] community. Research done by Marc Weber Tobias and Tobias Bluzmanis has shown these systems are vulnerable to a wide variety of attacks, including bumping.		* The validity of key bumping attacks against Medeco cylinders has been debated between Medeco and the [[locksport]] community. Research done by [[Marc Weber Tobias]] and Tobias Bluzmanis has shown these systems are vulnerable to a wide variety of attacks, including bumping.
	* Lockpicking attacks against this lock were previously thought extremely difficult due to axial rotation. A tool called the "Medecoder", developed by Jon King, made this process much easier and at the same time allowed for decoding of the sidebar code.<ref>King, Jon. [http://www.theamazingking.com/medecoder.html The Amazing King - Medecoder]</ref>		* Lockpicking attacks against this lock were previously thought extremely difficult due to axial rotation. A tool called the "Medecoder", developed by Jon King, made this process much easier and at the same time allowed for decoding of the sidebar code.<ref>King, Jon. [http://www.theamazingking.com/medecoder.html The Amazing King - Medecoder]</ref>

TecknicalTom: adding pages to the "Lock models" category

2010-10-01T13:15:06Z

adding pages to the "Lock models" category

← Older revision		Revision as of 13:15, 1 October 2010
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	[[Category:Medeco\|Biaxial]]		[[Category:Medeco\|Biaxial]]
	[[Category:Axial rotation]]		[[Category:Axial rotation]]
			[[Category:Lock models]]

Datagram at 20:47, 29 September 2010

2010-09-29T20:47:17Z

← Older revision		Revision as of 20:47, 29 September 2010
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	== Vulnerabilities ==		== Vulnerabilities ==

			The Biaxial may be vulnerable to one or more of the following:

	* [[Lockpicking]]		* [[Lockpicking]]

Datagram at 22:20, 27 September 2010

2010-09-27T22:20:21Z

← Older revision		Revision as of 22:20, 27 September 2010
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	File:Medeco_Biaxial_cylinder_sidebar.jpg\|Biaxial cylinder with [[sidebar]] inserted.		File:Medeco_Biaxial_cylinder_sidebar.jpg\|Biaxial cylinder with [[sidebar]] inserted.
	File:Medeco_Biaxial_bottom_pin_chisel.jpg\|Biaxial bottom pin showing chisel and sidebar notch.		File:Medeco_Biaxial_bottom_pin_chisel.jpg\|Biaxial bottom pin showing chisel and sidebar notch.
			File:Medeco_Biaxial_ARX_micro_milled.jpg\|A micro-milled ARX pin that defends against picking and decoding attacks.
	File:Medeco_Biaxial_pins.jpg\|Pins used in a five pin Biaxial.		File:Medeco_Biaxial_pins.jpg\|Pins used in a five pin Biaxial.
	File:Medeco_Biaxial_sidebar_aligned.jpg\|Sidebar pins properly aligned, side view.		File:Medeco_Biaxial_sidebar_aligned.jpg\|Sidebar pins properly aligned, side view.

Datagram at 16:09, 16 June 2010

2010-06-16T16:09:22Z

← Older revision		Revision as of 16:09, 16 June 2010
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	[[Category:Sidebar locks]]		[[Category:Sidebar locks]]
	[[Category:Medeco\|Biaxial]]		[[Category:Medeco\|Biaxial]]
			[[Category:Axial rotation]]

Datagram at 20:21, 12 August 2009

2009-08-12T20:21:13Z

← Older revision		Revision as of 20:21, 12 August 2009
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	\| years_produced = 1985-present		\| years_produced = 1985-present
	\| patent = [http://www.google.com/patents/about?id=MVY1AAAAEBAJ US 4,635,455]		\| patent = [http://www.google.com/patents/about?id=MVY1AAAAEBAJ US 4,635,455]
	\| related = [[Medeco Original]]<br>[[Medeco M3]]		\| related = [[Medeco Original]]<br>[[Medeco M3]]<br>[[Medeco Duracam]]
	}}		}}

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	== Principles of Operation ==		== Principles of Operation ==

	The Medeco Biaxial uses five or six pin-tumblers that provide [[axial rotation]] to interface with a sidebar located at 3 o'clock. Pin-tumblers must be properly raised to the shear line as well as rotated so that the sidebar arms can fall into notches on the side of each pin-tumbler. Axial rotation is provided by the design of the bottom (key) pins and angled bitting cuts on the key.		The Medeco Biaxial uses five or six pin-tumblers that provide [[axial rotation]] to interface with a sidebar located at 3 o'clock. Pin-tumblers must be properly raised to the shear line as well as rotated so that the sidebar arms can fall into notches on the side of each pin-tumbler. Axial rotation is provided by the design of the bottom (key) pins and angled bitting cuts on the key. There are 6 depths available for pin-tumblers, allowing 7,776 (6<sup>5</sup>) theoretical key [[differs]] in a five pin Biaxial (excluding the sidebar).

	<!-- ~~TODO: Pin~~ and sidebar ~~differ information --~~>		The main difference between the Biaxial and the Original is that Biaxial bottom pins sit be'''fore''' or '''aft'''er the center of the bitting cut. This allows for six total positions of the bottom pins, but pins use only three true gate positions. Biaxial pins have their own rotation codes:

			<div align="center">
			{\| class="prettytable"
			\|-
			! Type \|\| Left \|\| Center \|\| Right
			\|-
			! Fore (Biaxial)
			\| K \|\| B \|\| Q
			\|-
			! Original
			\| L \|\| C \|\| R
			\|-
			! Aft (Biaxial)
			\| M \|\| D \|\| S
			\|}</div>

			There are 6 total positions for bottom pins, allowing 7,776 (6<sup>5</sup>) and 46,656 (6<sup>6</sup>) total sidebar differs in five and six pin Biaxials, respectively. True gates on the pins can only be rotated to three positions, so there are only 243 (3<sup>5</sup>) and 729 (3<sup>6</sup>) actual rotational differs in five and six pin Biaxials.

	The Biaxial uses 2-3 mushroom top pins in each cylinder to provide manipulation resistance to traditional [[lockpicking]]. The sidebar notches on the sides of the bottom pins may also have false notches to resist manipulation by rotation. In addition, "ARX" pins are used to protect against manipulation by rotation. ARX pins close the sidebar notches before they reach the end of the pin, making it so they cannot be readily grabbed by a tool.		The Biaxial uses 2-3 mushroom top pins in each cylinder to provide manipulation resistance to traditional [[lockpicking]]. The sidebar notches on the sides of the bottom pins may also have false notches to resist manipulation by rotation. In addition, "ARX" pins are used to protect against manipulation by rotation. ARX pins close the sidebar notches before they reach the end of the pin, making it so they cannot be readily grabbed by a tool.
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	File:Medeco_Biaxial_pins_aligned.jpg\|Sidebar pins properly aligned by the key.		File:Medeco_Biaxial_pins_aligned.jpg\|Sidebar pins properly aligned by the key.
	</gallery></div>		</gallery></div>

			'''Notes'''
			* Biaxial and Original bottom pins are not interchangeable. They are identified by the position of the flag that limits rotation. The flag is 90° from the true gate in the Original and 180° in the Biaxial.
			* The Biaxial can be identified by the the Biaxial logo (a split circle) to the left of the keyway.

	== Disassembly instructions ==		== Disassembly instructions ==

← Older revision		Revision as of 22:20, 27 September 2010
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	File:Medeco_Biaxial_cylinder_sidebar.jpg\|Biaxial cylinder with [[sidebar]] inserted.		File:Medeco_Biaxial_cylinder_sidebar.jpg\|Biaxial cylinder with [[sidebar]] inserted.
	File:Medeco_Biaxial_bottom_pin_chisel.jpg\|Biaxial bottom pin showing chisel and sidebar notch.		File:Medeco_Biaxial_bottom_pin_chisel.jpg\|Biaxial bottom pin showing chisel and sidebar notch.
			File:Medeco_Biaxial_ARX_micro_milled.jpg\|A micro-milled ARX pin that defends against picking and decoding attacks.
	File:Medeco_Biaxial_pins.jpg\|Pins used in a five pin Biaxial.		File:Medeco_Biaxial_pins.jpg\|Pins used in a five pin Biaxial.
	File:Medeco_Biaxial_sidebar_aligned.jpg\|Sidebar pins properly aligned, side view.		File:Medeco_Biaxial_sidebar_aligned.jpg\|Sidebar pins properly aligned, side view.