CONTROL APPARATUS, SECURITY MANAGEMENT SYSTEM AND SECURITY MANAGEMENT METHOD

The purpose of the present invention is to provide a control device, a security management system and a security management method, which are capable of managing storage content with high reliability while suppressing the complication of the operation. According to the present invention, A central processing unit (3) of the control device includes: a control calculation unit (32) configured to perform calculation on the basis of the storage content of a nonvolatile storage unit (31) and control a machine; an update unit (33) configured to receive an operation input in a first maintenance mode or a second maintenance mode, which has a narrower operable range than the first maintenance mode, and to update the storage content of the nonvolatile storage unit (31) in response to the operation input; a security management unit (34A) configured to determine permission or prohibition of the operation input in the first maintenance mode using a hardware key (6); and a security management unit (34B) configured to determine permission or prohibition of the operation input in the second maintenance mode without using the hardware key (6).