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A safe (also called a strongbox or coffer) is a secure lockable box used for securing valuable objects against
theft Theft is the act of taking another person's property or services without that person's permission or consent with the intent to deprive the rightful owner of it. The word ''theft'' is also used as a synonym or informal shorthand term for som ...
or fire. A safe is usually a hollow
cuboid In geometry, a cuboid is a hexahedron, a six-faced solid. Its faces are quadrilaterals. Cuboid means "like a cube", in the sense that by adjusting the length of the edges or the angles between edges and faces a cuboid can be transformed into a c ...
or cylinder, with one face being removable or
hinge A hinge is a mechanical bearing that connects two solid objects, typically allowing only a limited angle of rotation between them. Two objects connected by an ideal hinge rotate relative to each other about a fixed axis of rotation: all other ...
d to form a
door A door is a hinged or otherwise movable barrier that allows ingress (entry) into and egress (exit) from an enclosure. The created opening in the wall is a ''doorway'' or ''portal''. A door's essential and primary purpose is to provide security b ...
. The body and door may be
cast Cast may refer to: Music * Cast (band), an English alternative rock band * Cast (Mexican band), a progressive Mexican rock band * The Cast, a Scottish musical duo: Mairi Campbell and Dave Francis * ''Cast'', a 2012 album by Trespassers William ...
from
metal A metal (from ancient Greek, Greek μέταλλον ''métallon'', "mine, quarry, metal") is a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electrical resistivity and conductivity, e ...
(such as
steel Steel is an alloy made up of iron with added carbon to improve its strength and fracture resistance compared to other forms of iron. Many other elements may be present or added. Stainless steels that are corrosion- and oxidation-resistan ...
) or formed out of plastic through
blow molding Blow molding (or moulding) is a manufacturing process for forming hollow plastic parts. It is also used for forming glass bottles or other hollow shapes. In general, there are three main types of blow molding: extrusion blow molding, injectio ...
. Bank teller safes typically are secured to the counter, have a slit opening for dropping valuables into the safe without opening it, and a time-delay combination lock to foil thieves. One significant distinction between types of safes is whether the safe is secured to a wall or structure or if it can be moved around. A less secure version (only suitable for
petty cash Petty cash is a small amount of discretionary funds in the form of cash used for expenditures where it is not sensible to make any disbursement by cheque, because of the inconvenience and costs of writing, signing, and then cashing the cheque. ...
) is usually called a cash-box.


History

The first known safe dates back to the 13th century BC and was found in the tomb of Pharaoh
Ramesses II Ramesses II ( egy, rꜥ-ms-sw ''Rīʿa-məsī-sū'', , meaning "Ra is the one who bore him"; ), commonly known as Ramesses the Great, was the third pharaoh of the Nineteenth Dynasty of Egypt. Along with Thutmose III he is often regarded a ...
. It was made of wood and consisted of a locking system resembling the modern pin tumbler lock. In the 16th century, blacksmiths in southern Germany, Austria, and France first forged cash boxes in sheet iron. These sheet-iron money chests served as the models for mass-produced cash boxes in the 19th century. In the 17th century, in northern Europe, iron safes were sometimes made in the shape of a barrel, with a padlock on top. In 1835, English inventors
Charles Charles is a masculine given name predominantly found in English and French speaking countries. It is from the French form ''Charles'' of the Proto-Germanic name (in runic alphabet) or ''*karilaz'' (in Latin alphabet), whose meaning was " ...
and
Jeremiah Chubb A Chubb detector lock is a lever tumbler lock with an integral security feature, a re-locking device, which frustrates unauthorised access attempts and indicates to the lock's owner that it has been interfered with. When someone tries to pick th ...
in
Wolverhampton Wolverhampton () is a city, metropolitan borough and administrative centre in the West Midlands, England. The population size has increased by 5.7%, from around 249,500 in 2011 to 263,700 in 2021. People from the city are called "Wulfrunians ...
, England, received a patent for a burglar-resisting safe and began a production of safes. The Chubb brothers had produced locks since 1818.
Chubb Locks Chubb Locks is a former brand name (expired 2010) of the Mul-T-Lock subsidiary of the Assa Abloy Group, which manufactures locking systems for residential, secure confinement and commercial applications. History Chubb was started as a ship's ...
was an independent company until 2000 when it was sold to
Assa Abloy Assa Abloy AB is a Swedish conglomerate whose offerings include products and services related to locks, doors, gates, and entrance automation. Related products and services include controlling access and confirming identities with keys, cards, ...
. On November 2, 1886, inventor Henry Brown patented a "receptacle for storing and preserving papers". The container was fire retardant and accident resistant as it was made from forged metal. The box was able to be safely secured with a lock and key and also able to maintain organization by offering different slots to organize important papers.


Specifications

Specifications for safes include some or all of the following parameters: * Burglar-resistance * Fire-resistance * Environmental resistance (e.g., to water or dust) * Type of lock (e.g.,
combination In mathematics, a combination is a selection of items from a set that has distinct members, such that the order of selection does not matter (unlike permutations). For example, given three fruits, say an apple, an orange and a pear, there are th ...
, key,
time lock A time lock (also timelock) is a part of a locking mechanism commonly found in bank vaults and other high-security containers. The time lock is a timer designed to prevent the opening of the safe or vault until it reaches the preset time, eve ...
,
electronic lock An electronic lock (or electric lock) is a locking device which operates by means of electric current. Electric locks are sometimes stand-alone with an electronic control assembly mounted directly to the lock. Electric locks may be connected to ...
ing) * Location (e.g., wall safe, floor safe) * Smart safes as part of an
automated cash handling Automated cash handling is the process of dispensing, counting and tracking cash in a bank, retail, check cashing, payday loan / advance, casino or other business environment through specially designed hardware and software for the purposes of l ...
system It is often possible to open a safe without access to the key or knowledge of the combination; this activity is known as
safe-cracking Safe-cracking is the process of opening a safe without either the combination or the key. Physical methods Different procedures may be used to crack a safe, depending on its construction. Different procedures are required to open different safe ...
and is a popular theme in
heist film The heist film or caper film is a subgenre of crime film focused on the planning, execution, and aftermath of a significant robbery. One of the early defining heist films was '' The Asphalt Jungle'' (1950), which ''Film Genre 2000'' wrote "alm ...
s. A
diversion safe Concealment devices or diversion safes are used to hide things for the purpose of secrecy or security. They are made from an ordinary household object such as a book, a soda can, a candle, a can, or something as small as a coin. The idea is tha ...
, or hidden safe, is a safe that is made from an otherwise ordinary object such as a book, a candle, a can, or even a wall outlet plug. Valuables are placed in these hidden safes, which are themselves placed inconspicuously (for example, a book would be placed on a book shelf). Fire resistant record protection equipment consists of self-contained devices that incorporate insulated bodies, doors, drawers or lids, or non-rated multi-drawer devices housing individually rated containers that contain one or more inner compartments for storage of records. These devices are intended to provide protection to one or more types of records as evidenced by the assigned Class rating or ratings; Class 350 for paper, Class 150 for microfilm, microfiche other and photographic film and Class 125 for magnetic media and hard drives. These types of enclosures can be rated for periods of ½-, 1-, 2- and 4-hour durations. In addition, these enclosures may be rated for their impact resistance, should the safe fall a number of feet to a lower level or have debris fall upon it during a fire. Burglary resistant safes are rated as to their resistance to the type of tools to be used in their attack and also the duration of the attack. The attack durations are for periods of 15 minutes, 30 minutes and 60 minutes. Safes can also contain hardware that automatically dispenses cash or validates bills as part of an
automated cash handling Automated cash handling is the process of dispensing, counting and tracking cash in a bank, retail, check cashing, payday loan / advance, casino or other business environment through specially designed hardware and software for the purposes of l ...
system.


Room-sized fireproof vaults

For larger volumes of heat-sensitive materials, a modular room-sized vault is much more economical than purchasing and storing many fire rated safes. Typically these room-sized vaults are utilized by corporations, government agencies and off-site storage service firms. Fireproof vaults are rated up to Class 125-4 Hour for large data storage applications. These vaults utilize ceramic fiber, a high temperature industrial insulating material, as the core of their modular panel system. All components of the vault, not just the walls and roof panels, must be Class 125 rated to achieve that overall rating for the vault. This includes the door assembly (a double door is needed since there is no single Class 125 vault door available), cable penetrations, coolant line penetrations (for split
HVAC Heating, ventilation, and air conditioning (HVAC) is the use of various technologies to control the temperature, humidity, and purity of the air in an enclosed space. Its goal is to provide thermal comfort and acceptable indoor air quality. ...
systems), and air duct penetrations. There are also Class 150 applications (such as microfilm) and Class 350 vaults for protecting valuable paper documents. Like the data-rated (Class 125) structures, these vault systems employ ceramic fiber insulation and components rated to meet or exceed the required level of protection. In recent years room-sized Class 125 vaults have been installed to protect entire data centers. As data storage technologies migrate from tape-based storage methods to hard drives, this trend is likely to continue.


Fire-resistant safes

A fire-resistant safe is a type of safe that is designed to protect its contents from high temperatures or actual
fire Fire is the rapid oxidation of a material (the fuel) in the exothermic chemical process of combustion, releasing heat, light, and various reaction products. At a certain point in the combustion reaction, called the ignition point, flames ...
. Fire resistant safes are usually rated by the amount of time they can withstand the extreme temperatures a fire produces, while not exceeding a set internal temperature, e.g., less than . Models are typically available between half-hour and four-hour durations. In the UK the BS EN-1047 standard is set aside for data and document safes to determine their ability to withstand prolonged intense heat and impact damage. * Document safes are designed to maintain an internal temperature no greater than while in a constantly heated environment in excess of . * Data safes are designed to maintain an internal temperature no greater than while in a constantly heated environment in excess of . These conditions are maintained for the duration of the test. This is usually at least 30 minutes but can extend to many hours depending on grade. Both kinds of safe are also tested for impact by dropping from a set height onto a solid surface and then tested for fire survivability once again. In the United States, both the writing of standards for fire-resistance and the actual testing of safes is performed by
Underwriters Laboratories The UL enterprise is a global safety science company headquartered in Northbrook, Illinois, composed of three organizations, UL Research Institutes, UL Standards & Engagement and UL Solutions. Established in 1894, the UL enterprise was founded as ...
. An in-floor safe installed in a concrete floor is very resistant to fire. However, not all floor safes are watertight and will often fill with water from fire hoses, therefore everything stored inside should be placed in either double zip lock bags, dry bags, or sealed plastic containers. Reinforced, fireproof cabinets are also used for dangerous chemicals or flammable goods.


Wall safes

Wall safes are designed to provide hidden protection for documents and miscellaneous valuables. Adjustable depth allows the maximization of usable space when installed in different wall thicknesses. Some wall safes feature pry-resistant recessed doors with concealed hinges for anti-theft protection. A painting can be hung over a wall safe to obscure it from public view.


Jewelry safes

Jewelry safes are burglary and fire safes made specifically to house
jewelry Jewellery ( UK) or jewelry ( U.S.) consists of decorative items worn for personal adornment, such as brooches, rings, necklaces, earrings, pendants, bracelets, and cufflinks. Jewellery may be attached to the body or the clothes. From a w ...
and valuables. These high end safes are typically manufactured with interior jewelry chests of fine woods and fabric liners with a range of organizational configurations.


Safe-cracking

Safe cracking is opening a safe without a combination or key. There are many methods of safe cracking ranging from brute force methods to guessing the combination. The easiest method that can be used on many safes is "safe bouncing", which involves hitting the safe on top; this may cause the locking pin to budge, opening the safe.


UL certification for safes

Underwriters Laboratories The UL enterprise is a global safety science company headquartered in Northbrook, Illinois, composed of three organizations, UL Research Institutes, UL Standards & Engagement and UL Solutions. Established in 1894, the UL enterprise was founded as ...
(UL) testing certifications for safes are known to be some of the most rigorous and most respected in the world. They are only matched by B.T.U/VDMA certifications (Germany). J.I.S. (Japan) and CSTB (France) preheat the oven with the safe inside until the temperature reaches the desired setting (as opposed to a sustained temperature of the rating), then the safe is cooled artificially (as opposed to naturally). Also, J.I.S. and CSTB only drop their safes from (as opposed to 30). Rarely are safes dropped or more and they are usually artificially cooled by the fire department. UL also runs an indirect explosion test on all safes. Additionally UL-768 certifies the combination lock against tampering. UL-140 certifies a relocking mechanism that will permanently lock the safe bolts, in case an electronic lock fails or a UL-768 rated lock is compromised.


Class 125

The container sustains an internal atmosphere of and 80% humidity. This class was introduced with the emergence of floppy disks. The containers are tested with only non-paper media, but are clearly sufficient to hold paper. New, more durable computer media, such as data on compact disks, crystallize at , which make this type of safe more than sufficient to store these media. However,
Underwriters Laboratories The UL enterprise is a global safety science company headquartered in Northbrook, Illinois, composed of three organizations, UL Research Institutes, UL Standards & Engagement and UL Solutions. Established in 1894, the UL enterprise was founded as ...
(UL) does not state data on Blu-ray disks, DVDs or CDs. Only floppy disks, which are no longer a common storage medium, is stated. An added benefit of this container is that it has water-resistant seal on its door. However UL does not check for water resistance and all fire-insulated safes are not tightly sealed. When exposed to heat, the insulation expands and seals all joints tightly which is supposed to keep water out. If a safe is submerged in water without any prior exposure to heat, water will seep in. These class ratings are used in conjunction with hour ratings such as: ½, 1, 2, 3, or 4.


Class 150

The container sustains an internal atmosphere less than and 85% humidity. This class was introduced with the emergence of computer data tapes or magnetic reel-to-reel tapes. UL tests this with paper and non-paper articles. This container is also sufficient in storing some optical media, such as compact disks. Cases can be purchased that will meet Class 125, if they are placed inside a Class 150 safe. Some may be waterproof due to a gasket on the door and the label will state this. These class ratings are used in conjunction with hour ratings such as: ½, 1, 2, 3, or 4.


Class 350

The container sustains an internal atmosphere of less than and 85% humidity. This is the most basic of U.L. tests and specifically tests for the storage of paper. The
autoignition temperature The autoignition temperature or kindling point of a substance is the lowest temperature in which it spontaneously ignites in a normal atmosphere without an external source of ignition, such as a flame or spark. This temperature is required to s ...
of paper is about , so this container is sufficient for storage of paper. Cases can be purchased that will meet Class 125, if they are placed inside a Class 350 container. These class ratings are used in conjunction with hour ratings such as: ½, 1, 2, 3, or 4.


Residential security container

While
colloquially Colloquialism (), also called colloquial language, everyday language or general parlance, is the linguistic style used for casual (informal) communication. It is the most common functional style of speech, the idiom normally employed in conversa ...
called "
gun safe A gun safe is a safe designed for storing one or more firearms and/or ammunitions. Gun safes are primarily used to prevent access by unauthorized or unqualified persons (such as children), for burglary protection and, in more capable safes, t ...
s" in North America, residential security containers do not meet the same UL standards against burglary and tool resistance as described below. They have their own UL standard (UL 1037), which is much less rigorous against attacks (having to withstand attacks for only five minutes), and are generally only to be used in non-commercial settings. However their burglary and fire resistance may surpass the minimum UL 1037 standard, usually with increased price which is translated into added metal, better design and firewall in the safe.


Class TL-15

This is a combination locked safe that offers limited protection against combinations of common mechanical and electrical tools. The safe will resist abuse for 15 minutes from tools such as hand tools, picking tools, mechanical or electric tools, grinding points, carbide drills and devices that apply pressure. Anything with a TL-rating conforms to UL 687.


Class TL-30

This is a combination locked safe that offers moderate protection against combinations of mechanical and electrical tools. The safe will resist abuse for 30 minutes from tools such as hand tools, picking tools, mechanical or electrical tools, grinding points, carbide drills, devices that apply pressure, cutting wheels and power saws.


Class TL-40

This is a combination locked safe that offers moderate protection against combinations of mechanical and electrical tools. The safe will resist abuse for 40 minutes from tools such as hand tools, picking tools, mechanical or electrical tools, grinding points, carbide drills, devices that apply pressure, cutting wheels and power saws.


Class TRTL-30

This is a combination locked safe that offers high protection against combinations of mechanical, electrical, and cutting tools. The safe will resist abuse for 30 minutes from tools such as hand tools, picking tools, mechanical or electrical tools, grinding points, carbide drills, devices that apply pressure, cutting wheels, power saws, impact tools and, in addition, can withstand an
oxy-fuel welding and cutting Principle of burn cutting Oxy-fuel welding (commonly called oxyacetylene welding, oxy welding, or gas welding in the United States) and oxy-fuel cutting are processes that use fuel gases (or liquid fuels such as gasoline or petrol, diesel ...
torch (tested gas limited to combined total oxygen and fuel gas.)


Class TRTL-60

This class will withstand the same assaults as Class TRTL-30 for 60 minutes.


Class TXTL-60

This class meets all the requirements for Class TRTL-60 and, in addition, can withstand high explosives such as
nitroglycerin Nitroglycerin (NG), (alternative spelling of nitroglycerine) also known as trinitroglycerin (TNG), nitro, glyceryl trinitrate (GTN), or 1,2,3-trinitroxypropane, is a dense, colorless, oily, explosive liquid most commonly produced by nitrating g ...
or equivalent to not more than of nitroglycerin in one charge (entire test must not use more explosive than that equivalent to of nitroglycerin).


European safe standards

Depending on the usage, the
European Committee for Standardization The European Committee for Standardization (CEN, french: Comité Européen de Normalisation) is a public standards organization whose mission is to foster the economy of the European Single Market and the wider European continent in global t ...
has published different European standards for safes. Testing and certification according to these standards should be done by an accredited certification body, e.g. European Certification Body. * EN 1143-1 is the main testing standard for safes, ATM safes, strongroom doors and strongrooms. For safes it features eleven resistance grades (0, I, II, ..., to X). From one grade to the next the security rises by approximately 50%. Testing is based on a free choice of attack tools and methods. Testing requires partial access (hand hole) and complete access attempts, on all sides of the product. The security is calculated by using ratings of tools and the attack time. The result is expressed in resistance units (RU). * EN 14450 is a testing standard for secure cabinets and strongboxes. The standard covers products meant for purposes where the security resistance required is less than that of EN 1143–1. For fire-resistant safes the EN 1047-1 (fire resistance standard similar to the fire resistance safe standard of UL) and EN 15659 (for light fire storage units) were published.


Gallery

File:S03 06 01 024 image 3158.jpg, Safe- iron with bronze decorations, including appliques heads of deities arranged in a row, found in Pompeii, now in the National Archaeological Museum of Naples File:Cashbox from 18th century.JPG, 18th century sealable cashbox, sometimes called a barrel safe (Finnish customs service museum in ,
Suomenlinna Suomenlinna (; until 1918 Viapori, ), or Sveaborg (), is an inhabited sea fortress the Suomenlinna district is on eight islands of which six have been fortified; it is about 4 km southeast of the city center of Helsinki, the capital of Finl ...
Image:0011Moebeltresor.JPG, A hotel safe. It is secured to the wall, which makes it useful for protecting valuables against theft.


See also

*
Access control In the fields of physical security and information security, access control (AC) is the selective restriction of access to a place or other resource, while access management describes the process. The act of ''accessing'' may mean consuming ...
*
Concealment device Concealment devices or diversion safes are used to hide things for the purpose of secrecy or security. They are made from an ordinary household object such as a book, a soda can, a candle, a can, or something as small as a coin. The idea is tha ...
, an inconspicuous object used to hide things * United States government safe and vault door specifications *
Gun safe A gun safe is a safe designed for storing one or more firearms and/or ammunitions. Gun safes are primarily used to prevent access by unauthorized or unqualified persons (such as children), for burglary protection and, in more capable safes, t ...
*
Lock Lock(s) may refer to: Common meanings *Lock and key, a mechanical device used to secure items of importance *Lock (water navigation), a device for boats to transit between different levels of water, as in a canal Arts and entertainment * ''Lock ...
, a mechanical fastening device * Manual override, opening a safe without cracking it *
Physical security Physical security describes security measures that are designed to deny unauthorized access to facilities, equipment and resources and to protect personnel and property from damage or harm (such as espionage, theft, or terrorist attacks). Phy ...
*
Safe deposit box A safe deposit box, also known as a safety deposit box, is an individually secured container, usually held within a larger safe or bank vault. Safe deposit boxes are generally located in banks, post offices or other institutions. Safe deposit ...
, a lightweight safe *
Security" \n\n\nsecurity.txt is a proposed standard for websites' security information that is meant to allow security researchers to easily report security vulnerabilities. The standard prescribes a text file called \"security.txt\" in the well known locat ...
*
Safe room A safe room or panic room is a fortified room that is installed in a private residence or business to provide a safe shelter, or hiding place, for the inhabitants in the event of a break in, home invasion, tornado, terror attack, or other thre ...
*
Strongroom A bank vault is a secure space where money, valuables, records, and documents are stored. It is intended to protect their contents from theft, unauthorized use, fire, natural disasters, and other threats, much like a safe. Unlike safes, vaults ...
, a bank vault *
Time-delay combination locks A time-delay combination lock is most commonly a digital, electronic combination lock equipped with a delay timer that delays the unlocking of the lock by a user-definable delay period, usually less than one hour. Unlike the time lock, which unloc ...


References


Further reading

* ''Locks, Safes, and Security: An International Police Reference'', published by Charles Thomas Publishers, Springfield, Illinois, United States. (2000) .


External links

{{Means of Exchange Money containers Security technology Cuboids