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EP-4737197-A1 - SERVER AND SYSTEM

EP4737197A1EP 4737197 A1EP4737197 A1EP 4737197A1EP-4737197-A1

Abstract

The server (100) includes a communication unit (130) that communicates with a DCM (230) of a vehicle (200), and a processor (110). The processor (110) sends a first digital certificate to the DCM (230) through the communication unit (130) when a contract cancellation application of the DCM (230) has not been performed. The processor (110) sends a second digital certificate having a longer expiration period than the first digital certificate to the DCM (230) through the communication unit (130) when the contract cancellation application of the DCM (230) has been performed.

Inventors

  • MISAWA, Takahiro

Assignees

  • TOYOTA JIDOSHA KABUSHIKI KAISHA

Dates

Publication Date
20260506
Application Date
20251017

Claims (10)

  1. A server (100) for sending, to a vehicle (200), a digital certificate to be used in communication between the vehicle (200) and a power stand (300), the server (100) comprising: a communication unit (130) that is configured to communicate with a vehicle communication device (230) of the vehicle; and a control unit (110), the digital certificate including a first digital certificate and a second digital certificate having a longer expiration period than the first digital certificate, the control unit (110) is configured to: send the first digital certificate to the vehicle communication device (230) through the communication unit (130) when a contract cancellation application of the vehicle communication device (230) has not been performed, and send the second digital certificate to the vehicle communication device (230) through the communication unit (130) when the contract cancellation application of the vehicle communication device (230) has been performed.
  2. The server according to claim 1, wherein the control unit (110) is configured to send the first digital certificate to the vehicle communication device (230) through the communication unit (130) when a contract application of the vehicle communication device (230) has been performed by a user of the vehicle (200).
  3. The server according to claim 1 or 2, wherein the control unit (110) is configured to: perform a process of confirming contract information of the vehicle communication device (230), and determine whether or not the contract cancellation application of the vehicle communication device (230) has been performed based on the contract information.
  4. The server according to claim 3, wherein the control unit (110) is configured to perform the process of confirming the contract information when an ignition power supply of the vehicle (200) is turned on.
  5. The server according to claim 1 or 2, wherein the control unit (110) is configured to send the second digital certificate to the vehicle communication device (230) through the communication unit (130) when the communication unit (130) receives a contract cancellation signal indicating that the contract cancellation application of the vehicle communication device (230) has been performed by a user of the vehicle (200).
  6. The server according to claim 1 or 2, wherein when the contract cancellation application of the vehicle communication device has been performed for a predetermined period before an expiration date of the first digital certificate, the control unit (110) is configured to send the second digital certificate to the vehicle communication device (230) through the communication unit (130) before a contract of the vehicle communication device (230) is cancelled.
  7. The server according to claim 6, wherein the vehicle communication device (230) is allowed to receive the digital certificate from the communication unit (130) if the contract of the vehicle communication device (230) is valid, and is not allowed to receive the digital certificate from the communication unit (130) if the contract of the vehicle communication device (230) is invalid, when the contract cancellation application of the vehicle communication device (230) has been performed for the predetermined period before the expiration date of the first digital certificate, the control unit (110) is configured to switch the contract of the vehicle communication device (230) from valid to invalid after the communication unit (130) receives from the vehicle communication device (230) a signal indicating that the second digital certificate has been written in an ECU (210) of the vehicle (200).
  8. A system (1) comprising: the server (100) according to claim 1 or 2; and a vehicle (200) equipped with a vehicle communication device (230) that is configured to communicate with the communication unit (130).
  9. The system of claim 8, wherein the vehicle includes an ECU (210) which allows the first digital certificate and the second digital certificate to be written therein, and the second digital certificate is initially written in the ECU (210).
  10. The system of claim 9, wherein the vehicle communication device (230) is allowed to communicate with a certificate authority (400) that issues the first digital certificate and the second digital certificate, the server (100) includes a storage unit (120) that is configured to store the second digital certificate which is sent from the certificate authority to the vehicle communication device (230) and initially written in the ECU (210), and the server (100) is configured to send the second digital certificate stored in the storage unit (120) to the vehicle communication device (230) through the communication unit (130) when the contract cancellation application of the vehicle communication device (230) has been performed.

Description

CROSS REFERENCE TO RELATED APPLICATIONS This non-provisional application is based on Japanese Patent Application No. 2024-190488 filed on October 30, 2024 with the Japan Patent Office, the entire contents of which are hereby incorporated by reference and to which the person of the art can refer when considering the present disclosure. BACKGROUND Field The present disclosure relates to a server and a system. Description of the Background Art Japanese National Patent Publication No. 2022-527902 discloses a system in which a digital certificate sent from an EV charging station is authenticated in a vehicle. In this system, a communication connection is established between the vehicle and the EV charging station based on the digital certificate, and then the vehicle is charged. SUMMARY Although not explicitly described in Japanese National Patent Publication No. 2022-527902, it is necessary to validate a contract of the vehicle communication device in order for the vehicle to receive the digital certificate, and if the contract of the vehicle communication device is invalid, the vehicle cannot receive the digital certificate. If the vehicle cannot receive the digital certificate, the communication connection cannot be established between the vehicle and the EV charging station. The present disclosure has been made to solve the above-mentioned problem, and an object of the present disclosure is to provide a server and a system capable of more reliably establishing a communication connection between a vehicle and a power station even if a contract of a vehicle communication device is invalid. A server according to a first aspect of the present disclosure is a server that sends, to a vehicle, a digital certificate to be used in communication between a vehicle and a power stand, and includes a communication unit that communicates with a vehicle communication device of the vehicle, and a control unit. The digital certificate includes a first digital certificate and a second digital certificate having a longer expiration period than the first digital certificate. The control unit sends the first digital certificate to the vehicle communication device through the communication unit when a contract cancellation application of the vehicle communication device has not been performed, and sends the second digital certificate to the vehicle communication device through the communication unit when the contract cancellation application of the vehicle communication device has been performed. A system according to a second aspect of the present disclosure includes the server according to the first aspect and a vehicle equipped with a vehicle communication device that communicates with a communication unit. The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram illustrating a configuration of a system according to the present embodiment.Fig. 2 is a first diagram illustrating a sequence of the system according to the present embodiment.Fig. 3 is a second diagram illustrating a sequence of the system according to the present embodiment.Fig. 4 is a sequence diagram of a system according to a first modification of the present embodiment.Fig. 5 is a sequence diagram of a system according to a second modification of the present embodiment. DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. It should be noted that in the following description of the present embodiment, the same or equivalent portions in the drawings will be denoted by the same reference numerals, and the description thereof will not be repeated. Fig. 1 is a diagram illustrating a configuration of a system 1 according to the present embodiment. System 1 includes a server 100 and a vehicle 200. Server 100 includes a processor 110, a memory 120, and a communication unit 130. Processor 110 is an example of a "control unit" in the present disclosure. Memory 120 stores, in addition to a program to be executed by processor 110, information (for example, maps, mathematical expressions, and various parameters) to be used in the program. Communication unit 130 is controlled by processor 110. Communication unit 130 can communicate with a data communication module (DCM) 230 to be described later, and a certificate authority 400 to be described later. Vehicle 200 includes an electronic control unit (ECU) 210, a battery pack 220, a DCM 230, a car navigation device 240, and an inlet 250. DCM 230 is an example of a "vehicle communication device" in the present disclosure. ECU 210 includes a processor 211, a memory 212, and a communication unit 213. Memory 212 stores, in addition to a program to be executed by processor 211, information (for example,