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Electronic key registration system

  • US 9,094,382 B2
  • Filed: 05/28/2013
  • Issued: 07/28/2015
  • Est. Priority Date: 06/06/2012
  • Status: Active Grant
First Claim
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1. An electronic key registration system that registers an electronic key device to a vehicle, the electronic key registration system comprising:

  • a controller arranged in the vehicle and capable of accessing a data center through at least a network;

    an initial electronic key device, a first additional electronic key device, and a second additional electronic key device, each storing a unique key ID code and a unique encryption key, wherein each encryption key is used for encrypted communication between the corresponding electronic key device and the vehicle to perform verification; and

    a computer-readable medium having instructions stored thereon that include;

    a first set of instructions configured to store a vehicle ID code in the controller when manufacturing the controller;

    a second set of instructions configured togenerate, with the first additional electronic key device, the encryption key of the first additional electronic key device by performing a computation using a first encryption key generation code stored in the first additional electronic key device and a first logic, andstore the generated encryption key in the first additional electronic key device to manufacture the first additional electronic key device;

    a third set of instructions configured totransmit, with the controller to the data center online, the vehicle ID code and the first encryption key generation code that is stored in the first additional electronic key device,generate, with the data center, the electronic key device encryption key of the first additional electronic key device by performing a computation using the received first encryption key generation code and the first logic,generate, with the data center, a second encryption key generation code by performing a computation using the generated electronic key device encryption key, the vehicle ID code, and the second logic,obtain, with the controller online, the second encryption key generation code from the data center,generate, with the controller, the encryption key of the first additional electronic key device by performing a computation using the vehicle ID code, the obtained second encryption key generation code, and the second logic, andstore, in the controller, the generated electronic key device encryption key to register the first additional electronic key device;

    a fourth set of instructions configured tostore, in the second additional electronic key device, the vehicle ID code corresponding to information indicated on an order sheet, a third encryption key generation code used to generate the encryption key of the second additional electronic key device, the encryption key of the second additional electronic key device generated by performing a computation using the vehicle ID code, the third encryption key generation code, and a second logic to manufacture the second additional electronic key device; and

    a fifth set of instructions configured toread, with the controller, the third encryption key generation code from the second additional electronic key device,generate, with the controller that is disconnected from the data center, the encryption key of the second additional electronic key device by performing a computation using the third encryption key generation code, the communication ID code stored in the controller, and the second logic, andstore, in the controller that is disconnected from the data center, the encryption key of the second additional electronic key device.

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