Key update device and storage medium storing key update program
AssigneeFujitsu Limited
InventorSeigo KOTANI
Life of this patent
Estimating the term…
Abstract
A key update device updates key information on the in-vehicle device. The key update device acquires a remaining battery level of a battery that supplies power to an in-vehicle device; determines whether or not to newly issue key information on the in-vehicle device based on the acquired remaining battery level, requests, when it is determined that key information is to be newly issued, an external device for a certificate for newly issued key information through communication with the external device; and switches key information on the in-vehicle device to key information certified by the external device.
Claims8
A key update device comprising:
- a memory, and
- a processor coupled to the memory and configured to:
- acquire a remaining battery level of a battery that supplies power to an in-vehicle device;
- determine whether or not to newly issue key information on the in-vehicle device based on the acquired remaining battery level,
- request, when it is determined that key information is to be newly issued, an external device for a certificate for newly issued key information through communication with the external device;
- and
- switch key information on the in-vehicle device to key information certified by the external device.
A non-transitory computer-readable storage medium storing therein a key update program that causes a computer to execute a key update process, the process comprising:
- acquiring a remaining battery level of a battery that supplies power to an in-vehicle device;
- determining whether or not to newly issue key information on the in-vehicle device based on the acquired remaining battery level,
- requesting, when it is determined that key information is to be newly issued, an external device for a certificate for newly issued key information through communication with the external device;
- and
- switching key information on the in-vehicle device to key information certified by the external device.
Dependencies are inferred from the claim text.