Anti-theft system for working machine, anti-theft control method of the working machine, and the working machine

An anti-theft system for a working machine, comprising:

• a controller having a non-volatile memory configured to store certification information of a plurality of terminals;
• a switch configured to switch to an OFF position providing no power to the controller, an ON position providing the power to the controller, and a START position providing, to the controller, a start command for starting a prime mover;
• a communicator to receive first terminal information from a first terminal and second terminal information from a second terminal, wherein
• the controller is configured or programmed, when the communicator receives the first terminal information same as the certification information stored in the memory,
• to store the second terminal information, in addition to the first terminal information, as the certification information of the second terminal in the memory, which is received by the communicator in a time window after the switch switches from the OFF position to the ON position and before the switch switches from the ON position to the START position, and
• not to store the second terminal information as the certification information of the second terminal in the memory, which is received by the communicator after the switch switches from the ON position to the START position.