A cylinder lock assembly includes a plug rotatable in a cylinder lock body. The plug includes chambers, each of which has a chamber depth axis. A plurality of thin, planar plug locking elements are received in the chambers. Each plug locking element has a key cut interface probe for interfacing with a key cut formed on a key. Each plug locking element is arranged to move along the chamber depth axis and does not rotate about the chamber depth axis. Each key cut interface probe has a predetermined orientation with respect to the chamber depth axis.

A door lock has a body (1) equipped with an internal chamber (2), an external chamber (3) and an interspace containing a mobile unit (4) having an internal cam (40) suitable for receiving and retaining a inner key end, and an external cam (41) adapted to receive and retain an outer key end. A plurality of springs (13) are positioned in the inner chamber (2) in passages parallel to the direction of insertion of the keys; pins (15) of a plurality of pins (15), loaded by respective springs (13) of said plurality of springs (13), are slidable in respective passages extending into the inner chamber (2), in the interspace and in the outer chamber (3) along a direction parallel to the key insertion direction. The external key can be modified to open locks of this type.

A lock system includes a swing latch, one or more pins, and a channel. The swing latch includes a latch arm having a keyed profile at a first end and a swing bar extending from a second end. The one or more pins have a hook portion and a peg portion. The hook portion defines an aperture. The hook portion is configured to engage the swing bar and the aperture is configured to release the swing bar. The channel is configured to accommodate a rotational movement of the swing latch, such that, responsive to the aperture aligning with the swing bar, the swing latch is permitted to rotate through the channel.