The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 01, 2007
Filed:
Jul. 30, 1999
Shinichi Taniguchi, Aichi-ken, JP;
Kazumasa Nakamura, Aichi-ken, JP;
Shinichi Taniguchi, Aichi-ken, JP;
Kazumasa Nakamura, Aichi-ken, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A vehicle-mounted communication device and a road-to-vehicle communication device are provided which each allow communication of information using a simple structure by making leakage of information difficult. Information including encryption information is communicated between an on-road apparatushaving a memoryin which an electronic key A is stored, and a vehicle-mounted apparatushaving a storage circuit. Encrypted route information and the like are stored as is in the vehicle-mounted apparatus. Encryption and decoding are executed at an on-road apparatus side. In reception of charges, encrypted information from an IC cardhaving a memoryin which a security mechanism is stored passes through the vehicle-mounted apparatus and is transferred to the on-road apparatus. The encrypted information from the IC cardis decoded with the on-road apparatus. Accordingly, the encrypted information is mutually transferred between these apparatuses and the vehicle-mounted apparatus does not require encryption or decoding. As a result, the security of a system can be improved.