Communication system, vehicle-mounted terminal, roadside device
First Claim
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.
1 Assignment
0 Petitions
Accused Products
Abstract
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 position information to the first server. The certificate authority acquires information about a vehicle-mounted terminal 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 and second lists to the roadside device and the vehicle-mounted terminal. The roadside device and the vehicle-mounted terminal verify a certificate using the first and second lists.
17 Citations
8 Claims
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1. A method for verifying a certificate in a communication system that includes
a 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. - View Dependent Claims (2, 3, 4, 5)
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6. A method of communicating using a vehicle-mounted terminal configured to transmit and receive information from one of a roadside device and another vehicle-mounted terminal, the method comprising:
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storing on the vehicle-mounded terminal a first list of vehicle-mounted terminals having valid certificates according to place and time and a second list of vehicle-mounted terminals having invalidated certificates, the first list and the second list are generated by a certificate authority after acquiring an 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 by a first server according to place and time, and a second server to verify the validity of a certificate of the vehicle-mounted terminal that is acquired from the first server; omitting certificate verification, by the certificate authority, and discarding a received message in response to receiving the message from a sender on the second list; omitting certificate verification and verifying a signature, by the certificate authority, in response to receiving a message from a sender on the first list; confirming, by the second server based on information from the roadside device, an effective place and an effective time in the first list and the second list; and deleting, by the second server, the first list and the second list, in response to the vehicle-mounted terminal existing outside the effective place and/or exceeding the effective time, wherein the first and second server are implemented by hardware processors.
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7. A method of communicating using a roadside device configured to transmit and receive information from a plurality of vehicle-mounted terminals, the method comprising:
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storing, on the roadside device, a first list of vehicle-mounted terminals of the plurality of vehicles-mounted terminals having valid certificates according to place and time and a second list of vehicle-mounted terminals of the plurality of vehicles-mounted terminals having invalidated certificates, the first list and the second list are generated by a certificate authority after acquiring an appearance information about the plurality of vehicle-mounted terminals whose likelihood of appearing on the road side device is greater than a predetermined threshold, the appearance information being acquired by a first server according to place and time, and a second server to verify the validity of a certificate of each of the plurality of vehicle-mounted terminals that is acquired from the first server; omitting certificate verification, by the certificate authority, and discarding a message received from a certain vehicle-mounted terminal in response to the second list listing the certain vehicle-mounted terminal; omitting certificate verification, by the certificate authority, and verifying a signature in response to receiving a message from a sender on the first list; confirming, by the second server based on information from the road site device, an effective time in the first list and the second list; and deleting, by the second server, the first list and the second list in response to the roadside device exceeding the effective time, wherein the first and second server are implemented by hardware processors. - View Dependent Claims (8)
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Specification