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 performs encrypted communication with a communication subject using the same encryption key; and a controller included in the communication subject, wherein the portable device registration system registers the portable device to the controller; wherein the controller stores identification information unique to the communication subject and a key generation logic used to generate the encryption key; the portable device stores an encryption key generation code unique to the portable device and the encryption key, which is generated using the encryption key generation code and the key generation logic; the controller performs a registration process including
writing the identification information to the portable device through wireless communication with the portable device,retrieving the encryption key generation code from the portable device through wireless communication with the portable device,generating an encryption key that is the same as that of the portable device from the retrieved the encryption key generation code using the key generation logic stored in the controller, andstoring the generated encryption key 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.