| 摘要 |
PROBLEM TO BE SOLVED: To provide a communication system having high security.SOLUTION: A communication system performs long-distance radio communication between a vehicle 10 and an electronic key 20, and a door lock device 14 of the vehicle 10 is permitted to operate when authentication of the electronic key 20 through the long-distance radio communication is established. The communication system is provided with a mobile phone 30 for performing short-distance radio communication between itself and the electronic key 20, and an authentication operation of the electronic key 20 through the long-distance radio communication is permitted when the short-distance radio communication is established. |
