Abstract: A lock configured to be operated by a key, which includes a key shank, which at least in a part of its axial length includes a profile which is closed or semi-closed to define at least one cavity including a key coding. The lock includes a plug for receiving the key shank. The plug is rotatable with respect to a housing in the unlocked state of the lock and includes a keyway, which is defined by a predetermined geometry. At least one keyway shaping element is provided, which is formed separate from the plug and is fixed to the plug such that it is immovable relative to the plug when the key shank is inserted into the plug. A protruding portion of the at least one keyway shaping element protrudes into the keyway to redefine its geometry.

Abstract: A key for controlling a lock with a cylindrical plug, where the body of its shank (10) is at least in a part of its length formed by a hollow, partially enclosed profile, the external rounded surface of which (16) is shaped for turning the key in the lock cavity, while at least in the end part (12) of the lateral section of the shank (10), an open cavity is created for inserting an arm of the validating lever (5) of the lock. At least a part of the shank (10) is created in the U- or V-shape, while in at least one such part of the shank (10), the bottom and/or the wall of the inner and outer arch of the shank (10) is fitted with at least one open coding track (9) and/or at least one coding channel (18) with a shaped coding surface. The lock for validating the key contains at least one cylindrical plug (1) rotatable in its housing (2), where in the plug body (1), a sprung sidebar (3) of the lock is situated in its outer longitudinal groove, pushed to the inner surface of the housing (2).