There is a need to reduce the certificate verification time in a communication system. A communication system (10) includes a certificate authority (100) for performing authentication, a roadside device (110), a vehicle-mounted terminal (120), a first server (130), and a second server (140). The vehicle-mounted terminal transmits its own position information to the first server. The certificate authority acquires information about a vehicle-mounted terminal highly likely to appear according to place and time from the first server. The certificate authority allows the second server to verify validity of a certificate for a vehicle-mounted terminal acquired from the first server. The certificate authority generates a first list of vehicle-mounted terminals having valid certificates and a second list of vehicle-mounted terminals having invalid certificates according to place and time based on a verification result. The certificate authority transmits the first list and the second list to the roadside device and the vehicle-mounted terminal. The roadside device and the vehicle-mounted terminal verify a certificate using the received first and second lists. Thus, the certificate verification time is reduced.


    Access

    Download


    Export, share and cite



    Title :

    COMMUNICATION SYSTEM, VEHICLE-MOUNTED TERMINAL, ROADSIDE DEVICE


    Additional title:

    KOMMUNIKATIONSSYSTEM, FAHRZEUGMONTIERTES ENDGERÄT UND STRASSENRANDVORRICHTUNG
    SYSTÈME DE COMMUNICATION, TERMINAL MONTÉ SUR VÉHICULE, DISPOSITIF ROUTIER


    Contributors:
    ANDO ERIKO (author) / NAGANUMA KEN (author) / OWADA TORU (author)

    Publication date :

    2017-05-03


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION , Übertragung digitaler Information, z.B. Telegrafieverkehr / G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS / H04W WIRELESS COMMUNICATION NETWORKS , Drahtlose Kommunikationsnetze



    Communication system, vehicle-mounted terminal, roadside device

    ANDO ERIKO / NAGANUMA KEN / OWADA TORU | European Patent Office | 2017

    Free access

    Communication system, vehicle-mounted terminal, roadside device

    ANDO ERIKO / NAGANUMA KEN / OWADA TORU | European Patent Office | 2015

    Free access

    COMMUNICATION SYSTEM, VEHICLE-MOUNTED TERMINAL, ROADSIDE DEVICE

    ANDO ERIKO / NAGANUMA KEN / OWADA TORU | European Patent Office | 2015

    Free access

    ROADSIDE DEVICE, VEHICLE-MOUNTED UNIT, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD

    EGAMI AKIHIRO / MOTOZUKA HIROYUKI / SAKAMOTO TAKENORI | European Patent Office | 2021

    Free access

    VEHICLE-MOUNTED COMMUNICATION DEVICE, ROADSIDE MACHINE COMMUNICATION DEVICE, AND ROAD-TO-VEHICLE COMMUNICATION SYSTEM

    NAKATSUKASA MASAHIRO / TAKIMOTO YASUAKI | European Patent Office | 2023

    Free access