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Communication system, vehicle-mounted terminal, roadside device

  • US 9,601,016 B2
  • Filed: 08/18/2015
  • Issued: 03/21/2017
  • Est. Priority Date: 05/24/2010
  • Status: Active Grant
First Claim
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1. A method for verifying a certificate in a communication system that includesa certificate authority, wherein the certificate authority is implemented by a hardware processor, configured to perform authentication;

  • a roadside device configured to be provided at a roadside;

    a plurality of vehicle-mounted terminals each having a certificate;

    a first server configured to collect position information about the vehicle-mounted terminals; and

    a second server configured to manage information about the roadside device and vehicle-mounted terminals whose certificate is invalidated;

    transmitting and receiving information between the roadside device and the vehicle-mounted terminals and between the vehicle-mounted terminals;

    transmitting position information from the vehicle mounted terminals to the first server;

    acquiring, using the certificate authority, appearance information about vehicle-mounted terminals whose likelihood of appearing on the road side device is greater than a predetermined threshold, the appearance information being acquired according to place and time from the first server;

    allowing, using the appearance information that is acquired by the certificate authority, the second server to verify the validity of a certificate of a vehicle-mounted terminal;

    generating, using the certificate authority, 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;

    transmitting, using the certificate authority, the first list and the second list to the roadside device and the vehicle-mounted terminals; and

    verifying a certificate with at least one from among the roadside device and the vehicle-mounted terminals using the received first and second lists.

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