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:
Jul. 11, 2017
Filed:
Jun. 02, 2014
Mitsubishi Electric Corporation, Tokyo, JP;
Manabu Misawa, Tokyo, JP;
Nobuhiro Kobayashi, Tokyo, JP;
Yukio Izumi, Tokyo, JP;
Tsuneo Sato, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
For improving, when performing road-vehicle communication or vehicle-vehicle communication between a roadside device and in-vehicle devices or therebetween, efficiency of distribution information verification including digital signature verification and freshness verification, there are included a memory unit that stores, as an authentication information history, a history of second authentication information of communication data which was received in the past from another communication device and which includes first authentication information, distribution information, and the second authentication information and an authentication processing unit that verifies, on the basis of the first authentication information of new communication data being newly received communication data, authenticity of the second authentication information of the new communication data and that compares the second authentication information of the new communication data with the authentication information history stored in the memory unit to verify freshness of the new communication data.