Electrically assisted vehicle

An electrically assisted vehicle comprising:

• an electric motor;
• a device including a microcontroller and a transmission circuit, the transmission circuit sending motor control-related data used to control rotation of the electric motor;
• and
• a control circuit that controls the electric motor based on the motor control-related data;
• wherein
• the control circuit and the device communicate with each other and both retain a same data generation rule;
• when the control circuit sends first data to the device, the transmission circuit receives first reception data from the control circuit, the microcontroller generates second data at least including a portion of the first reception data, the microcontroller generates third data from the second data by using the data generation rule, and the transmission circuit sends the third data to the control circuit;
• and
• the control circuit receives second reception data from the device, generates fourth data at least from the first data by using the data generation rule, compares a portion of the second reception data and the fourth data, and if a result of the comparison indicates a match, permits control of the electric motor that is based on the motor control-related data.