Abstract: Disclosed is apparatus and methodology for providing a retrofittable lock assembly for an enclosure. A manually or electronically accessible lock assembly has been provided that may be attached to an enclosure to control access to items stored in the enclosure. In a particular form, the retrofittable lock may be applied to a refrigerator used to store controlled medications. The retrofittable lock contains electronic circuitry that maintains a record of user identification, date, and time of access of users seeking access to items stored in the enclosure.

Abstract: Disclosed are apparatus and methodology for providing an improved pick-resistant lock structure. Contact edges associated with individual combination and driver pins are moved away from the true shear lines to deny a lock picker the ability to feel any contact between a selected pin and a pin hole edge. Methodologies and apparatus are also provided to prevent a lock picker from obtaining an impression of the lock shear plane.