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Encyclopedia > Key (lock)
A single key

A key is a device which is used to open a lock by turning. They consist of two parts, the blade, which is inserted into the lock, and the bow, left protruding so that a torque can be applied. The blade of a key is normally designed to open one specific lock, although master keys are designed to open sets of similar locks. Image File history File links Information. ... A key scanned by my friend. ... A key scanned by my friend. ... This article does not cite any references or sources. ... Torque applied via an adjustable end wrench Relationship between force, torque, and momentum vectors in a rotating system In physics, torque (or often called a moment) can informally be thought of as rotational force or angular force which causes a change in rotational motion. ...


Keys are an essential feature of modern living in the developed world and are common around the globe. They provide a cheap way of securing many things, including buildings and vehicles. It is common for people to carry the set of keys they need for their day to day activities around with them, often linked by a keyring adorned by key fobs and known as a keychain. A developed country is a country that has achieved (currently or historically) a high degree of industrialization, and which enjoys the higher standards of living which wealth and technology make possible. ... Antarctica Oceania Africa Asia Europe North America South America Middle East Caribbean Central Asia East Asia North Asia South Asia Southeast Asia SW. Asia Australasia Melanesia Micronesia Polynesia Central America Latin America Northern America Americas C. Africa E. Africa N. Africa Southern Africa W. Africa C. Europe E. Europe N... A keyring is a ring of material, usually metal or plastic, that holds keys and other small items, which are sometimes connected to keychains. ... A wooden key fob made by aarikka of Finland A key fob is a decorative item many people often carry with their keys, on a ring or a chain, for ease of tactile identification, to provide a better grip, or to make a personal statement. ... A key with a simple text label keychain A keychain or key chain is a small chain, usually made from metal or plastic, that connects a small item to a keyring. ...

A streetside Keymaker in Bangalore, outside the City Market with his tools

Contents

Image File history File links Metadata Size of this preview: 688 × 599 pixelsFull resolution (1727 × 1504 pixel, file size: 790 KB, MIME type: image/jpeg) Rajesh Dangi, Bangalore, City Market Street,The Key Maker File historyClick on a date/time to view the file as it appeared at that time. ... Image File history File links Metadata Size of this preview: 688 × 599 pixelsFull resolution (1727 × 1504 pixel, file size: 790 KB, MIME type: image/jpeg) Rajesh Dangi, Bangalore, City Market Street,The Key Maker File historyClick on a date/time to view the file as it appeared at that time. ... , Bangalore (Bengalūru) (Kannada: ; pronunciation: in Kannada and in English) is the capital of the state of Karnataka in [[India]. Located on the Deccan Plateau in the south-eastern part of Karnataka, Bangalore has an estimated metropolitan population of 6. ...

Special types of keys

House key

A house key is the most common kind of key. When held upright as if to open a door, a series of grooves on either side of the key limits the type of lock cylinder the key can slide into. As the key slides into the lock, a series of notches allow the pins to move up and down until those pins are in line with the shear line of the cylinder, allowing that cylinder to rotate freely inside the lock and the lock to open. This article does not cite any references or sources. ...


Car key

Main article: Power door locks
Ignition switch between the seats (2005 Saab 9-5).
Ignition switch between the seats (2005 Saab 9-5).
Car keys.
Car keys.

A car key or an automobile key is a key used to open or start an automobile, often identified with the logo of the car company at the head. Modern key designs are usually symmetrical, and some use grooves on both sides, rather than a cut edge, to actuate the lock. It has multiple uses for the automobile with which it was sold. A car key can open the doors, as well as start the ignition, open the glove compartment and also open the trunk (boot) of the car. Some cars come with an additional key known as a valet key that starts the ignition and opens the drivers side door but prevents the valet from gaining access to valuables that are located in the trunk or the glove box. Recently, features such as coded immobilizers have been implemented in newer vehicles. More sophisticated systems make ignition dependent on electronic devices, rather than the mechanical keyswitch. Ignition switches/locks are combined with security locking of the steering column (in many modern vehicles) or the gear lever (Saab Automobile). In the latter, the switch is between the seats, preventing damage to the driver's knee in the event of a collision. Power door locks (aka electric door locks or central locking) allow the driver or front passenger to simultaneously lock or unlock all the doors of an automobile or truck, by pressing a button or flipping a switch. ... Image File history File links Size of this preview: 800 × 578 pixelsFull resolution (1944 × 1405 pixel, file size: 1. ... Image File history File links Size of this preview: 800 × 578 pixelsFull resolution (1944 × 1405 pixel, file size: 1. ... 2000 Saab 9-5 sedan 2006 Saab 9-5 station wagon The Saab 9-5 is an executive car produced by the Swedish automaker Saab. ... Image File history File linksMetadata Size of this preview: 800 × 600 pixelsFull resolution (1280 × 960 pixel, file size: 148 KB, MIME type: image/jpeg) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Key (lock) Metadata This file contains... Image File history File linksMetadata Size of this preview: 800 × 600 pixelsFull resolution (1280 × 960 pixel, file size: 148 KB, MIME type: image/jpeg) File links The following pages on the English Wikipedia link to this file (pages on other projects are not listed): Key (lock) Metadata This file contains... This article does not cite any references or sources. ... Karl Benzs Velo model (1894) - entered into the first automobile race An automobile or motor (usually shortened to just car) is a wheeled passenger vehicle that carries its own motor. ... The ignition system of an internal-combustion engine is an important part of the overall engine system that provides for the timely burning of the fuel mixture within the engine. ... The glovebox of a Cadillac Eldorado Brougham For the sealed container for handling hazardous materials, see glovebox. ... This 1931 Ford Model A features a separate trunk on its rear trunk rack. ... This article or section does not cite its references or sources. ... A modern road cars steering wheel Steering wheels from different periods A steering wheel is a type of steering control used in most modern land vehicles, including all mass-production automobiles. ... A gear stick (also gearstick, gear lever and gear shifter) is the lever used to change gear in a vehicle, such as an automobile, with manual transmission or automatic transmission. ... Saab Automobile AB is a subsidiary of General Motors. ...


Keyless entry systems, which utilize a remote control in place of a car key, are becoming a standard feature on many new cars. Some of them are handsfree. A remote keyless system is a system designed for automobiles that duplicates all of the features of a standard car key with the added convenience of elimitanting the need to physically manipulate a key into a lock as well as being able to do so at a distance. ... This does not adequately cite its references or sources. ...

Switchblade key from a 2005 Land Rover LR3.
Switchblade key from a 2005 Land Rover LR3.

Some keys are high-tech in order to prevent the theft of a car. Mercedes-Benz uses a key that, rather than have a cut metal piece to start the car, uses an encoded infrared beam that communicates with the car's computer. If the codes match, the car can be started. These keys can be expensive to replace, if lost and can cost up to US$400. Some car manufacturers like Land Rover and Volkswagen use a 'switchblade' key where the key is spring-loaded out of the fob when a button is pressed. This eliminates the need for a separate key fob but can often make the key large and uncomfortable to keep in pockets for extended periods of time. This type of key has also been known to be confiscated by airport security officials[1]. Image File history File linksMetadata Size of this preview: 706 × 587 pixelsFull resolution (706 × 587 pixel, file size: 90 KB, MIME type: image/jpeg) This is the switchblade key to a 2005 Land Rover LR3. ... Image File history File linksMetadata Size of this preview: 706 × 587 pixelsFull resolution (706 × 587 pixel, file size: 90 KB, MIME type: image/jpeg) This is the switchblade key to a 2005 Land Rover LR3. ... This page is about the Mercedes-Benz brand of automobiles and trucks from the DaimlerChrysler automobile manufacturer. ... Image of two girls in mid-infrared (thermal) light (false-color) Infrared (IR) radiation is electromagnetic radiation of a wavelength longer than that of visible light, but shorter than that of radio waves. ... Land Rover was the name of one of the first British civilian all-terrain utility vehicles, first produced by Rover in 1947. ... Volkswagen AG (ISIN: DE0007664005), or VW, is an automobile manufacturer based in Wolfsburg, Germany. ... Look up fob, FOB in Wiktionary, the free dictionary. ...

Master key

A master key is designed to open a set of several locks. These locks also have keys which are specific to each one (the change key) and cannot open any of the others in the set. Locks which have master keys have a second set of the mechanism used to open them which is identical to all of the others in the set of locks. For example, master keyed pin tumbler locks will have two shear points at each pin position, one for the change key and one for the master key. A far more secure (and more expensive) system has two cylinders in each lock, one for the change key and one for the master key. The pin tumbler lock is a lock mechanism that uses pins of varying lengths to prevent the lock from opening without the correct key. ...


Larger organizations, with more complex "grandmaster key" systems, may have several masterkey systems where the top level grandmaster key works in all of the locks in the system.


A practical attack exists to create a working master key for an entire system given only access to a single master-keyed lock and its associated key. This is described in Cryptology and Physical Security: Rights Amplification in Master-Keyed Mechanical Locks


Control key

A control key is a key used in interchangeable core locking systems. The control key enables the user to remove a core in the cylinder, with a specific combination and replace it with a core with a different combination. In small format interchangeable cores, similar to those developed by Frank Best of the Best Lock Corporation, the key operates a separate shear line, located above the operating key shear line. In other format interchangeable cores, the key may work like a master key along the operating shear line and also contact a separate locking pin that holds the core in the cylinder.


Double-sided key

A double-sided key is very similar to a house or car key with the exception that it has two sets of teeth, an upper level standard set of teeth and a lower, less defined set of teeth beside it. This makes the double-sided key's profile and its corresponding lock look very similar to a standard key while making the attempt to pick the lock more difficult.


Paracentric key

A paracentric key is designed to open a paracentric lock. It is distinguishable by the contorted shape of its blade, which protrudes past the centre vertical line of the key barrel. Instead of the the wards on the outer face of the lock simply protruding into the shape of the key along the spine, the wards protrude into the shape of the key along the entire width of the key, including along the length of the teeth.[2] Patented by the Yale lock company in 1898, paracentric cylinders are not exceptionally difficult to pick, but require some skill and know-how on the part of the person attempting to pick the lock. Year 1898 (MDCCCXCVIII) was a common year starting on Saturday (link will display the full calendar) of the Gregorian calendar (or a common year starting on Monday of the 12-day-slower Julian calendar). ...


Skeleton key

A warded lock fits both its key and skeleton keys its size or smaller.
A warded lock fits both its key and skeleton keys its size or smaller.

A skeleton key (or passkey) is a very simple design of key which usually has a cylindrical shaft (sometimes called a shank) and a single, minimal flat, rectangular tooth or bit. Skeleton keys are also usually distinguished by their bow, or the part one would grasp when inserting the key, which can be either very plain or extremely ornate. A skeleton key is designed to circumvent the wards in warded locks. Warded locks and their keys provide minimal security and only a slight deterrent as any key with a shaft and tooth that has the same or smaller dimensions will open the lock. However, warded keys were designed to only fit a matching lock and the skeleton key would often fit many. Many other objects which can fit into the lock may also be able to open it. Due to its limited usefulness, this type of lock fell out of use after more complicated types became easier to manufacture. In modern usage, it has come to describe a key, usually with minimal features, which can open all or most of a type of badly designed lock. Skeleton keys can be newly-minted (and sold by restoration hardware companies) or antiques. True skeleton keys were most popular in the late 1800s, although they continued to be used well into the 20th century and can still be found today in use, albeit in vintage homes and antique furniture. A skeleton key is distinguished from a barrel key in that a skeleton key usually has a solid shank, whereas a barrel shafted key can be made either by drilling out the shank from the bit end or by folding metal into a barrel shape when forging the key. Image File history File links Size of this preview: 543 × 600 pixelsFull resolution (2130 × 2352 pixel, file size: 1. ... Image File history File links Size of this preview: 543 × 600 pixelsFull resolution (2130 × 2352 pixel, file size: 1. ... A warded lock is a type of lock that uses a set of obstructions, or wards, to prevent the lock from opening unless the correct key is inserted. ...


Tubular key

Tubular key and lock schematic

A tubular key (sometimes referred to as a barrel key when describing a vintage or antique model) is one that is designed to open a tubular pin tumbler lock. It has a hollow, cylindrical shaft which is usually much shorter and has a larger diameter than most conventional keys. Antique or vintage-style barrel keys often closely resemble the more traditional skeleton key but are a more recent innovation in keymaking. In modern keys of this type, a number of grooves of varying length are built into the outer surface at the end of the shaft. These grooves are parallel to the shaft and allow the pins in the lock to slide to the end of the groove. A small tab on the outer surface of the shaft prevents the pins in the lock from pushing the key out and works with the hollow center to guide the key as it is turned. Image File history File links Illustration of a Tubular pin tumbler lock made by Wapcaplet in Blender and touched up in the GIMP. File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Image File history File links Illustration of a Tubular pin tumbler lock made by Wapcaplet in Blender and touched up in the GIMP. File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... This article or section does not cite its references or sources. ...


The modern version of this type of key is harder to duplicate as it is less common and requires a different machine from regular keys. These keys are most often seen in home alarm systems, in the United States.


Security on these types of locks are problem, as rediscovered recently. It's known as the "Bic Pen Trick."


Zeiss Key

A Zeiss key is a cross between a house key and a tubular key. It has three sets of teeth at 90 degrees to each other with a flattened fourth side. Though this type of key is easy to duplicate, the extra sets of teeth deter lockpicking attempts. Lock picking is the art of unlocking a lock without its intended key. ...


Do Not Duplicate Key

A keychain, a simple way to hold keys
A keychain, a simple way to hold keys

A Do Not Duplicate key is one which has been stamped do not duplicate by a locksmith or manufacturer as a passive deterrent to prevent a retail key cutting service from duplicating a key without authorization or without contacting the locksmith or manufacturer who originally cut the key. More importantly, this is a control system for whoever is the owner of the key, such as a maintenance person or security guard, to identify keys that should not be freely distributed or used without authorization. Though it is intended to prevent unauthorized key duplication, copying restricted keys remains a common security problem. There is no direct legal implication in the US for someone that copies a key that is stamped do not duplicate (unless it is a government owned key), but there are patent restrictions on some key designs (see "restricted keys"). Image File history File links Metadata Size of this preview: 800 × 600 pixelsFull resolution (1632 × 1224 pixel, file size: 221 KB, MIME type: image/jpeg) File historyClick on a date/time to view the file as it appeared at that time. ... Image File history File links Metadata Size of this preview: 800 × 600 pixelsFull resolution (1632 × 1224 pixel, file size: 221 KB, MIME type: image/jpeg) File historyClick on a date/time to view the file as it appeared at that time. ... A key with a simple text label keychain A keychain or key chain is a small chain, usually made from metal or plastic, that connects a small item to a keyring. ...


United States Code 18 USC Sec. 1704 deals with United States Post Office keys, and 18 USC Sec. 1386 deals with United States Department of Defense keys.


Restricted Key

A restricted keyblank is a keyway and blank for which a manufacturer has set up a restricted level of sales and distribution. Restricted keys are often protected by patent, which prohibits other manufacturers from making unauthorized productions of the key blank. In many jurisdictions, customers must provide proof of ID before a locksmith will duplicate a key using a restricted blank. These days, many restricted keys have special in-laid features, such as magnets, different types of metal, or even small computer chips to prevent duplication.


Keycard

A keycard, while not actually considered a key, is a plastic card which stores a digital signature that is used with electronic access control locks. It is normally a flat, rectangular piece of plastic and may also serve as an ID card. There are several popular type of keycards in use and include the mechanical holecard, bar code, magnetic stripe, smart card (embedded with a read/write electronic microchip), and RFID proximity cards. The keycard is used by presenting it to a card reader; swiping or inserting of mag stripe cards, or in the case of RFID cards, merely being brought into close proximity to a sensor. In security, specifically physical security, the term access control refers to the practice of restricting entrance to a property, a building, or a room to authorized persons. ... German identity document sample An identity document is a piece of documentation designed to prove the identity of the person carrying it. ... In the 1970s, the lodging industry had an increasing problem with hotel crime. ... Wikipedia encoded in Code 128_B A barcode (also bar code) is a machine-readable representation of information in a visual format on a surface. ... Marcus Boltonas (Mark Boltan) Marcus Boltonas Brief history The magnetic stripe which is often reffered to as the Bolton is derived from the Marcus Boltonas from the Jurassic period. ... Smart card used for health insurance in France. ... Integrated circuit of Atmel Diopsis 740 System on Chip showing memory blocks, logic and input/output pads around the periphery Microchips with a transparent window, showing the integrated circuit inside. ... An EPC RFID tag used for Wal-Mart Radio Frequency Identification (RFID) is an automatic identification method, relying on storing and remotely retrieving data using devices called RFID tags or transponders. ... An EPC RFID tag used for Wal-Mart Radio Frequency Identification (RFID) is an automatic identification method, relying on storing and remotely retrieving data using devices called RFID tags or transponders. ...


Bar code technology is not a secure form of a key, as the bar code can be copied in a photocopier and often read by the optical reader.


Magnetic stripe keycards are becoming increasingly easy to copy, but have the security advantage that one may change the stored key in a magnetic swipe card in case the current key may be compromised. This immediate change of the "key" information can be applied to other media, but this media probably offers the least expensive option, and the most convenient to users and managers of systems that use this media. Example: If you own a car with this system, you can change your keys anytime you want. You can buy new media anywhere a gift card is sold. At least at this point in time, you could buy a gift card for a penny, then use that as the media for the keys to your car. If the system uses digital environmental data samples to create the "key" string, every car can have a set of keys that no one else has. If a card is stolen, or copied without authorization, the card can be remade, and the car security system can be synchronized with the new card, and no longer activationally responsive to the copy of the old card. This approach can empower the system controller (owner/individual or centralized administration of a business).


Computerized authentication systems, such as key cards, raise privacy concerns, since they enable computer surveillance of each entry. Currently RFID cards and key fobs are becoming more and more popular due to its ease of use. Many modern households have installed digital locks that make use of key cards, in combination with biometric fingerprint and keypad PIN options. Privacy has no definite boundaries and it has different meanings for different people. ... This article includes a list of works cited or a list of external links, but its sources remain unclear because it lacks in-text citations. ... An electronic lock is a locking device which uses some form of electronics to authenticate those accessing it, sometimes using two-factor authentication. ... At Disney World, biometric measurements are taken of the fingers of multi-day pass users to ensure that the pass is used by the same person from day to day. ... A macro shot of a palm and the base of several fingers; as seen here, debris can gather between the ridges. ...


The first keycard was the mechanical holecard type patented by Tor Sørnes, a concept he later developed into the magnetic stripe card key. In the 1970s, the lodging industry had an increasing problem with hotel crime. ... Tor Sørnes, 1925-, inventor and engineer. ... Marcus Boltonas (Mark Boltan) Marcus Boltonas Brief history The magnetic stripe which is often reffered to as the Bolton is derived from the Marcus Boltonas from the Jurassic period. ...


History of locks and keys

Wooden locks and keys were in use as early as 4,000 years ago in Egypt [3]. This article does not cite any references or sources. ...


See also

Wikimedia Commons has media related to:
Keys

Image File history File links Commons-logo. ... An access badge is the identification used to gain entry to the office or other places that have access controlled entry points. ... In security, specifically physical security, the term access control refers to the practice of restricting entrance to a property, a building, or a room to authorized persons. ... Advanced key is the electronic access and authorization system which is available as an option in Audi A8, A6, and eventually all models which Audi produces. ... Common Access Card issued to Contractor personnel The Common Access Card (CAC) is a United States Department of Defense (DoD) smartcard issued as standard identification for active duty military personnel, reserve personnel, civilian employees, and eligible contractor personnel. ... This article does not cite any references or sources. ... Door security relates to prevention of door-related burglaries. ... An electronic lock is a locking device which uses some form of electronics to authenticate those accessing it, sometimes using two-factor authentication. ... A key is a piece of information that controls the operation of a cryptography algorithm. ... A keyway is the shaped channel in a lock cylinder into which the key slides to gain access to the lock tumblers, or a slot cut in an axle or shaft to accept a locking piece. ... Locksmithing began as the science and art of making and defeating locks. ... Lock picking is the art of unlocking a lock without its intended key. ... Logical Security consists of software safeguards for an organization’s systems, including user ID and password access, authentication, access rights and authority levels. ... A magnetic stripe card is a type of card capable of storing data by modifying the magnetism of tiny iron-based magnetic particles on a band of magnetic material on the card. ... A password is a form of secret authentication data that is used to control access to a resource. ... A passphrase is a sequence of words or other text used to control access to a computer system, program or data. ... PINs are most often used for ATMs but are increasingly used at the Point of sale, especially for debit cards. ... This article or section does not cite its references or sources. ... Photo identification is generally used to define any form of identification that includes a photograph of the holder. ... Physical security describes measures that prevent or deter attackers from accessing a facility, resource, or information stored on physical media. ... Proximity card is a generic name for contactless integrated circuit devices used for security access or payment systems. ... In the Peoples Republic of China, Public Security Bureau (Chinese: 公安局; pinyin: ) or PSB refers to government offices that handle things such as policing, security and social order, but also issues such as residence registration as well as immigration and travel affairs of foreigners. ... A typical home safe. ... Safe-cracking is the process of opening a safe, generally without the combination. ... This article needs additional references or sources for verification. ... In the field of physical security, security lighting is often used as a preventative and corrective measure against intrusions or other criminal activity on a physical piece of property. ... A security policy is a plan of action for tackling security issues, or a set of regulations for maintaining a certain level of security. ... Smart card used for health insurance in France. ... A swipe card is a (typically) credit card size badge incorporating a magnetic stripe, an RFID tag, a transponder device and/or a microchip mostly used for business premises access control or electronic payment. ... The Wiegand effect is named after its discoverer, John R. Wiegand. ...

References

http://www.usatoday.com/travel/flights/today/2005-06-22-sky-archivejune21_x.htm



 

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