Granted Patent B2

US 12,731,448 · App. 18/615,021 · Granted Sep 8, 2026

Inventors: Suguru Matsushita (Kariya-city, JP); Marek Kociecki (Courbevoie, FR); Michal Wasilewski (Courbevoie, FR); Filip Later (Courbevoie, FR); Baltlomiej Lewinski (Courbevoie, FR)

Assignees: DENSO CORPORATION; IDEMIA FRANCE

G07C9/00309G07C9/00571

Abstract

Claims (45)

1 . A mobile terminal comprising:

an input device that receives an operation of a user;

a short-range communication unit that performs short-range wireless communication, which is wireless communication conforming to a predetermined short-range wireless communication standard;

a network connection unit that accesses the Internet; and

a terminal control unit having at least one processor, wherein:

the terminal control unit transmits an owner key issuance request signal, which requests to issue an owner key that is a service key for a vehicle owned by the user and has an authority as an owner of the vehicle, to a server that generates the service key for using the vehicle based on the operation of the user;

the terminal control unit receives the owner key from the server as a response of the server in response to the owner key issuance request signal;

the terminal control unit stores a received owner key in a predetermined terminal memory;

the terminal control unit starts communication for registering the owner key in a vehicular device under a condition that a communication link of the short-range wireless communication with the vehicular device mounted on the vehicle is established;

the server delivers a plurality of disposable one-time authentication keys having an expiration date to the mobile terminal; and

the mobile terminal deletes one of the plurality of disposable one-time authentication keys which is stored in the mobile terminal and has expired according to the expiration date.

2 . The mobile terminal according to claim 1 , further comprising:

at least one of (i) a circuit and (ii) a processor having a memory storing computer program code,

wherein the at least one of the circuit and the processor having the memory is configured to cause the mobile terminal to provide:

the input device; the short-range communication unit; the network connection unit; and the terminal control unit.

3 . A vehicular digital key system comprising:

a vehicular device that is mounted on and used in a vehicle;

at least one mobile terminal that is a portable information processing terminal;

a server that generates a service key unique to each mobile terminal as key information for using the vehicle, and distributes the service key to the mobile terminal, wherein:

the vehicular device is configured to acquire the service key by communicating with the mobile terminal or the server and store the service key in a predetermined vehicle side memory;

the vehicular device is configured to store an owner key in the vehicle side memory under a condition that a specific owner registration start signal is input from a predetermined dedicated device or the server; and

the owner key is the service key having an authority as an owner of the vehicle;

wherein:

the server is configured to generate a plurality of disposable one-time authentication keys based on the service key when the service key is issued, and deliver the service key to the mobile terminal;

the mobile terminal is configured to check a validity of the vehicular device as a communication partner using the one-time authentication key;

the mobile terminal is configured to transmit a replenishment request signal for requesting a replenishment of the one-time authentication key to the server when a remaining number of the one-time authentication keys is equal to or less than a predetermined value;

the server is configured to newly generate a plurality of the one-time authentication keys based on a reception of the replenishment request signal, and transmit the one-time authentication keys to the mobile terminal;

the server delivers the plurality of disposable one-time authentication keys having an expiration date to the mobile terminal; and

the mobile terminal deletes one of the plurality of disposable one-time authentication keys which is stored in the mobile terminal and has expired according to the expiration date.

4 . A vehicular digital key management method executed by:

at least one mobile terminal that is a portable information processing terminal capable of performing short-range wireless communication, which is wireless communication conforming to a predetermined short-range wireless communication standard;

a vehicular device that is mounted on a vehicle and is configured to be capable of performing the short-range wireless communication; and

a server that generates a service key, which is key information for using the vehicle, based on a request from the mobile terminal, the vehicular digital key management method comprising:

issuing, by the server, an owner key which is the service key having an authority as an owner, based on a request from an owner terminal registered in an user database as the mobile terminal possessed by the owner of the vehicle;

delivering, by the server, an issued owner key to the owner terminal without transmitting the owner key to the vehicular device;

switching, by the vehicular device, an owner registration prohibition mode in which a registration of the owner key is rejected to an owner registration mode in which the owner key can be registered, by the vehicular device based on an input of a predetermined registration start signal from a predetermined dedicated device or the server;

transmitting, by the owner terminal, the owner key to the vehicular device by performing the short-range wireless communication under a condition that the vehicular device is in the owner registration mode; and

receiving, by the vehicular device, the owner key from the owner terminal, and storing, by the vehicular device, the owner key in a predetermined non-volatile vehicle side memory under the condition that the vehicular device is in the owner registration mode;

wherein:

the server is configured to generate a plurality of disposable one-time authentication keys based on the service key when the service key is issued, and deliver the service key to the mobile terminal;

the mobile terminal is configured to check a validity of the vehicular device as a communication partner using the one-time authentication key;

the mobile terminal is configured to transmit a replenishment request signal for requesting a replenishment of the one-time authentication key to the server when a remaining number of the one-time authentication keys is equal to or less than a predetermined value;

the server is configured to newly generate a plurality of the one-time authentication keys based on a reception of the replenishment request signal, and transmit the one-time authentication keys to the mobile terminal;

the server delivers the plurality of disposable one-time authentication keys having an expiration date to the mobile terminal; and

the mobile terminal deletes one of the plurality of disposable one-time authentication keys which is stored in the mobile terminal and has expired according to the expiration date.

Assignments (1)

Priority Claims (1)

Continuity (2)

References Cited (27)