Abstract: The invention relates to a dynamically controlled electronic locking system. The locking system includes apparatus (10) for entering data into the locking system, an electronic data processing circuit (12) and a locking and unlocking control system (14). The locking system electronics include, in a particularly advantageous manner, linear feed shift registers for processing the values allowing access to be assured to a protected space. Application to protection systems for confined spaces to which access has to be controlled.