Numerical control apparatus, numerical control method and computer program for controlling machine tool

A numerical control apparatus configured to control a machine tool, the numerical control apparatus comprising:

• a storage configured to store unique information unique to the numerical control apparatus or an operator;
• a receiving part configured to receive a machining program including incidental information, the incidental information including information unique to the numerical control apparatus or the operator capable of executing the machining program;
• a determination part configured to check the incidental information included in the machining program received by the receiving part against the unique information stored in the storage, and determine whether information matching the unique information is included in the incidental information;
• and
• a machine controller configured to execute the machining program received by the receiving part so as to control the machine tool, only when it is determined that the information matching the unique information is included in the incidental information.