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A Wordlock letter combination lock.. A combination lock is a type of locking device in which a sequence of symbols, usually numbers, is used to open the lock. The sequence may be entered using a single rotating dial which interacts with several discs or cams, by using a set of several rotating discs with inscribed symbols which directly interact with the locking mechanism, or through an ...
A rotary dial combination padlock. A rotary combination lock is a lock commonly used to secure safes and as an unkeyed padlock mechanism. This type of locking mechanism consists of a single dial which must be rotated left and right in a certain combination in order to open the lock.
Modern time delay combination locks can have many functions such as multiple different codes, pre-set time lock settings (open and close times), pre-set vacation times (e.g. Christmas Day), dual code facility, and a full audit trail providing a detailed record of the lock history showing who opened the lock, when and how long it was open. [3] [4]
These locks are often compromised through power analysis attacks. [12] [13] Several tools exist that can automatically retrieve or reset the combination of an electronic lock; notably, the Little Black Box [14] and Phoenix. Tools like these are often connected to wires in the lock that can be accessed without causing damage to the lock or ...
The sliding bolt, when extended, mechanically prevents operation of a switch, valve, gate, or other device. Many variations exist, with different shapes of interlock bolt and multiple lock cylinders on an interlock. A significant feature of the interlock is that the key is held or trapped in one position of the lock.
A telephone keypad using the ITU E.161 standard. Numeric keypad, integrated with a computer keyboard A calculator 1984 flier for projected capacitance keypad. A keypad is a block or pad of buttons set with an arrangement of digits, symbols, or alphabetical letters.
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A time lock is a clock that prevents the vault's door from opening until a specified number of hours have passed. This is still the "theft proof" lock system that Sargent invented in the late nineteenth century. Such locks are manufactured by only a few companies worldwide. The locking system is supplied to the vault manufacturer preassembled.
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