US 12,479,400 B2
Vehicular digital key system, vehicular digital key management method, vehicular device, and mobile terminal
Suguru Matsushita, Kariya (JP); Marek Kociecki, Courbevoie (FR); Michal Wasilewski, Courbevoie (FR); Filip Later, Courbevoie (FR); and Bartlomiej Lewinski, Courbevoie (FR)
Assigned to DENSO CORPORATION, Kariya (JP); and IDEMIA FRANCE, Courbevoie (FR)
Filed by DENSO CORPORATION, Kariya (JP); and IDEMIA FRANCE, Courbevoie (FR)
Filed on Mar. 25, 2024, as Appl. No. 18/615,138.
Application 18/615,138 is a continuation of application No. PCT/JP2022/035811, filed on Sep. 27, 2022.
Claims priority of application No. 2021-159414 (JP), filed on Sep. 29, 2021.
Prior Publication US 2024/0227730 A1, Jul. 11, 2024
Int. Cl. H04W 12/041 (2021.01); B60R 25/24 (2013.01); H04W 12/06 (2021.01)
CPC B60R 25/241 (2013.01) [H04W 12/041 (2021.01); H04W 12/068 (2021.01)] 18 Claims
OG exemplary drawing
 
1. A vehicular digital key system comprising:
a vehicular device that is mounted on and used in a vehicle;
a mobile terminal that is an information processing terminal carried by a user; and
a server that generates a service key unique for each mobile terminal as key information for using the vehicle, and distributes the service key directly or indirectly to each of the mobile terminal and the vehicular device, wherein:
the vehicular device is configured to determine a validity of the mobile terminal using a disposable one-time authentication key generated based on the service key;
the server generates a plurality of the one-time authentication keys based on a request from the mobile terminal, and delivers the one-time authentication keys to the mobile terminal with an expiration date;
the mobile terminal is configured to receive the one-time authentication key from the server;
the mobile terminal stores the one-time authentication key in a predetermined terminal-side memory; and
the mobile terminal is configured to replace a part or all of the one-time authentication keys stored in the terminal-side memory based on the expiration date of each one-time authentication key.