Articles of manufacture, machines, processes for using the articles and machines, processes for making the articles and machines, and products produced by the process of making, along with necessary intermediates, directed to a lock and key system.

A lock core includes a shell, a plug within and rotatable relative to the shell between a first position and a second position about a longitudinal axis of the plug, and a lock. The lock has a first locked position preventing rotation of the plug relative to the shell, an unlocked position allowing rotation of the plug relative to the shell and a second locked position different from the first locked position preventing rotation of the plug relative to the shell. The lock is moveable from the first locked position preventing rotation of the plug relative to the shell to the unlocked position with a first movement of the lock, the first movement having a vector component along the longitudinal axis of the plug and a vector component along an axis transverse to the longitudinal axis of the plug

The lock plug can have a plug body rotatably mountable within a lock housing for rotation around an axis, the plug body having a solid of revolution shape, the plug body having an insert component assembled to a primary component, a keyway defined in the plug body, the keyway having a length parallel to the rotation axis, the keyway adapted to receive a key blade matching a cross-sectional shape of the keyway, and a blocking mechanism protruding into the keyway, the blocking mechanism configured to prevent the plug from rotating unless actuated by the key blade and unless the key blade is of a matching type, the blocking mechanism integrated to the plug insert. The method of assembling the lock plug can include assembling components of the blocking mechanism to the insert component prior to assembling the insert component to the primary component.