Abstract: A lock system, lock and key is provided. The lock includes additional cutouts on the face plate (123), requiring the insertion of a corresponding unblocking member on the keyblade (144). The unblocking portion engages an engagement portion (162) to allow release of a corresponding sidebar (126), thereby allowing rotation of the lock. The engagement portion (162) additionally must project to the correct length to allow the engagement portion (162) to travel the correct distance to release the sidebar (126).

Abstract: A lock system is provided. The system includes a lock (110) which includes a lock housing (118) having a cylindrical cavity (116) for receiving a rotatable lock core (112). The housing (118) has upon its internal surface a longitudinal slot (130). A substantially cylindrical lock core (112) arranged within the cylindrical cavity (116). The lock core (112) has a keyway (119) formed therein and extending longitudinally from an end face of the lock core (112). The lock core (112) further includes a plurality of guide bores (120) which extend outwardly from the keyway (119) and communicate therewith. Each guide bore (120) is adapted to receive a locking pin (122). Coding on a key blade (144) inserted into the keyway (119) causes each locking pin (122) to move along the respective guide bore (120). The lock core (112) further includes a recess (124) extending outwardly from the plurality of guide bores (120) and communicating therewith. The recess (124) is adapted to receive a sidebar (126).