| 摘要 |
Provided is an electronic key system. In one embodiment, during an onboard registration process, information, in which an update number is added to a mobile code from a mobile device (50) that has 1 registered as the key number, is generated as a vehicle code, and is registered as registration primary identification information. At the same time, a mobile code from each mobile device is registered by being associated with registration primary identification information. During a mobile device registration process, the mobile code of the mobile device and the update number are sent in reply to an onboard device (10) if the key number contained in the mobile reply request from the onboard device is 1. Moreover, if the key number contained in the mobile reply request from the onboard device is 2 or greater, then in addition to replying to the onboard device with the mobile code of the mobile device, the vehicle code from the onboard device is registered by being associated with the key number that is received by each mobile device. |
