Portable device registration system and portable device registration method

摘要

An immobilizer ECU generates an encryption key using key generating logic, from a SEED code included in an ID code signal sent from an electronic key, and registers the encryption key to the immobilizer ECU. The immobilizer ECU receives an instruction from a registration and deletion tool and sends, to the electronic key, a deletion request signal that requests the deletion of the SEED code. The electronic key deletes the SEED code from the electronic key if a deletion request signal has been received.

主权项

1. A portable device registration system comprising:
a portable device that uses a first encryption key to perform encrypted communication with a vehicle which uses a second encryption key that corresponds to the first encryption key of the portable device; and a controller included in the vehicle, wherein the portable device registration system registers the portable device to the controller; wherein the controller stores identification information unique to the vehicle and a key generation logic configured to generate the second encryption key of the vehicle; the portable device stores an encryption key generation code unique to the portable device and the first encryption key of the portable device; the controller performs a registration process including
writing the identification information to the portable device through wireless communication with the portable device,retrieving a copy of the encryption key generation code from the portable device through wireless communication with the portable device,generating the second encryption key of the vehicle that is the same as that of the first encryption key of the portable device using the retrieved copy of the encryption key generation code and the key generation logic stored in the controller, andstoring the generated second encryption key of the vehicle in the controller; the portable device registration system includes a deletion tool instructing the controller to transmit a deletion request signal to the portable device to delete the encryption key generation code from the portable device; and the controller transmits the deletion request signal to the portable device after receiving an instruction from the deletion tool, and the portable device deletes the encryption key generation code from the portable device when receiving the deletion request signal so that the identification information of the vehicle and the first encryption key of the portable device remain in the portable device.