A lock bypass is a technique in

lockpicking Lock picking is the practice of unlocking a lock by manipulating the components of the lock device without the original key. Although lock-picking can be associated with criminal intent, it is an essential skill for the legitimate professi ...

, of defeating a

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 ...

through unlatching the underlying locking mechanism without operating the lock at all. It is commonly used on devices such as

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 o ...

s, where there is no natural access (such as a keyhole) for a tool to reach the locking mechanism. Because the mechanism itself is not being manipulated, this could technically not be considered lockpicking at all. However, it does fall under the repertoire of techniques used to open locks. Lock bypass is one of the most important parts of

locksmithing Locksmithing is the science and art of making and defeating locks. Locksmithing is a traditional trade and in many countries requires completion of an apprenticeship. The level of formal education legally required varies from country to country ...

, especially with respect to public buildings which must be able to be opened from inside in case of fire, thus allowing the use of "

letter box A letter box, letterbox, letter plate, letter hole, mail slot or mailbox is a receptacle for receiving incoming mail at a private residence or business. For outgoing mail, Post boxes are often used for depositing the mail for collection, althou ...

tools" among other techniques. Locks may be bypassed by a variety of other techniques including loiding, i.e. the "credit card" technique, against self-closing "latch systems." Padlocks may be bypassed by shimming, where one inserts a sprung steel device to retract the spring-loaded catch that restrains the shackle. Locked cars may be bypassed by introducing a stiff wire between the door and the cars structure to operate internal unlocking catches. The previous method may be assisted by gently prying the door from the frame with an air wedge or lever. To avoid bypass, a door should be secured using a

deadbolt A dead bolt, deadbolt or dead lock is a locking mechanism distinct from a spring bolt lock because a deadbolt can only be opened by a key or handle. The more common spring bolt lock uses a spring to hold the bolt in place, allowing retraction ...

system, in which the locking mechanism and bolt are operated by the key. This prevents the device from being opened without the locking mechanism itself being properly operated.

References

{{DEFAULTSORT:Lock bypass Locksmithing