Authentication system and vehicle
AssigneeToyota Jidosha Kabushiki Kaisha
InventorTakahiro MISAWA
Life of this patent
Estimating the term…
Abstract
A server performs processing including the steps of obtaining an upper limit number of digital certificates that can be stored when determining that a priority change has been notified, obtaining information about a stored digital certificate, transmitting priority information when determining that a digital certificate having a priority higher than that of an existing distal certificate has been set, transmitting certificate data, and transmitting the priority information when determining that the digital certificate having a priority higher than that of the existing distal certificate has not been set.
Claims8
An authentication system comprising:
- a server that transmits a digital certificate used for authentication in use of a power stand that performs power transmission between a power storage device mounted in an electrically powered vehicle and the power stand;
- and
- a vehicle including a storage device that stores the digital certificate received from the server,
- wherein upon receipt of a first priority of the digital certificate, the server transmits the digital certificate having the first priority to the vehicle when the first priority is higher than a second priority of an existing digital certificate stored in the storage device, and does not transmit the digital certificate having the first priority to the vehicle when the first priority is lower than the second priority.
A vehicle comprising:
- a power storage device;
- a storage device that stores a digital certificate used for authentication in use of a power stand that performs power transmission between the power storage device and the power stand;
- a communication device configured to communicate with a server that is a transmission source of the digital certificate;
- and
- a controller that writes the digital certificate to the storage device upon receipt of the digital certificate from the server,
- wherein the controller compares a first priority of the digital certificate obtained by the server with a second priority of an existing digital certificate stored in the storage device, changes the digital certificate to the digital certificate used preferentially for authentication in use of the power stand when there is a change in relationship of magnitude between these priorities, and does not change the digital certificate used preferentially when there is no change in relationship of magnitude between these priorities.
Dependencies are inferred from the claim text.