The invention relates to a flat key profile for a lock and key system in which a key channel corresponding to the key profile is provided in the lock cylinder. In this case, the key profile of the key shank facing the key back upper profile section and a key face facing the lower profile section, wherein in the lower profile section in a side surface of the key shank a triangular, the center plane of the key shank superior, paracentric profile groove (2) provided on the opposite side surface of the key shank one above or below the opposite paracentric profile groove (2) arranged, triangular profile groove (3; 4) is provided, the arrangement of the paracentric profile groove relative to the opposite profile groove is such that an imaginary line (7), the vertical to the keychain plane from the intersection of the upper or lower leg of the paracentric profile groove with the key side surface to the opposite profile groove extends, to an imaginary line (5) extending from the intersection of the upper or lower leg of the opposite profile groove with the key side surface extends to the paracentric profile groove, a vertical distance (9).

A key comprises a body with a head and a blade and a magnet in the head. The key can be part of a key set including a plurality of keys. Each key can have a hole through the head, for example through approximately a center of the head. The key set can include a hub through the holes in the keys, such that the keys are coupled by and are rotatable around the hub. The magnets in the keys can silence, and resist, index, and lock rotation of the keys around the hub.

The invention relates generally a device that authenticates a user, operator, or object using multiple factors, thus decreasing the likelihood of unauthorized use. These factors preferably are independent from each other and difficult to defeat. By combining a mechanical key with a number of physically unclonable functions (PUF), the resulting system may be impossible to duplicate or defeat. The addition of the PUF can be deployed to mechanical keys or RFID's of different types without reducing the functionality of the first factors operation.

Wine and liquor bottles have a shrink-wrap seal, or other type, that is applied to the cap/cork end of the bottle. This seal material can be loaded with randomly magnetized particles, such as flakes of an alloy of neodymium, iron, and boron (NdFeB). The randomly magnetized particles provide a unique unclonable magnetic fingerprint to the bottle. The magnetic field may be recorded for one or more circumferential bands around the surface of the bottle's neck and used as a magnetic fingerprint to authenticate the bottle. Authentication can be performed by inserting the bottle in an appropriate fixture, which measures the magnetic fingerprint.

An exemplary system includes a mechanical key and an access control device. The access control device includes a housing defining a keyway that has a fixed position within the housing. The access control device further includes a root depth sensor assembly, an insertion depth sensor assembly, a control assembly in communication with the sensor assemblies, and an electronic lock device. The control assembly is configured to determine the bitting code of the mechanical key based upon information received from the sensor assemblies, to compare the bitting code of the mechanical key to a lock/unlock bitting code; and to transmit a lock/unlock command in response to the bitting code matching the lock/unlock bitting code. The electronic lock device is configured to transition between a locked state and an unlocked state in response to receiving the lock/unlock command and without requiring rotation of the mechanical key.

In accordance with the invention, a key encasement is provided which enables an authorized user to obtain access to a key shrouded within the encasement by way of a combination lock. The key encasement generally includes a key, a thumb pin connected to the key, a lock assembly including a plurality of rotatable combination dials, and a housing assembly for concealing the key and lock assembly while in a shrouded, locked position.

A combination of a disc tumbler cylinder lock and a key. The disc tumbler cylinder lock includes rotation limiting device for the key and a guiding element. The key includes grooves for the guiding element, which has two rails making up some of said rotation limiting device, and both of the rails include at least one limiter protrusion arranged to facing inward in the disc tumbler cylinder lock. The key includes at least one recess for the limiter protrusions. The rotation limiting device further includes a front guide having the rails in association therewith. The front guide and the rails are arranged to allow the key, which is in a basic position in the disc tumbler cylinder lock, to be turned for releasing the locking of the disc tumbler cylinder lock.

A lock has a locked condition and an unlocked condition comprising a barrel with a circular bore having three splines. A cylindrical plug is adapted to reside in the bore. First, second and retaining tumblers are positioned in tumbler slots, with the first and retaining tumblers biased in one direction toward the first spline and the second tumbler biased in the opposite direction into the second spline. When a first key is inserted, the first and second tumblers are moved against the bias so they retract from the respective splines and the plug can be rotated from the locked and unlocked conditions. When a second key is inserted while in the unlocked condition, the first, second and retaining tumblers are moved so the respective tumblers are either positioned in the third longitudinal spline or fully retained in the plug and the plug can be retracted axially from the barrel.

A key for an electromechanical locking device includes a key bow, and with the key bow includes a housing and an, in particular single, button. The housing includes an actuating section for actuating the button and a support section for supporting the actuating section, with the actuating section and the support section being configured in one piece with one another.

The lock with key having expanding arm elements is an electromechanical lock mechanism. The lock with key having expanding arm elements comprises a key structure, a lock structure, and a lock control circuit. The lock structure is a fastening device. The lock structure secures the position of a first object relative to a second object. The lock structure is a releasable structure such that the position of the first object relative to the second object can be adjusted after the lock structure is released. The lock control circuit is an electric circuit. The lock control circuit forms an electronic locking mechanism that fastens and releases the locking structure. The key structure is a multi-blade structure that controls the operation of the lock control circuit.