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. 26, 2020
Filed:
Aug. 04, 2016
Denso Corporation, Kariya, Aichi-pref., JP;
Yasuharu Sugano, Kariya, JP;
Takeshi Sugashima, Kariya, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
A communication apparatus includes a counter, a reception portion, an update portion, a code generation portion, a determination portion, and a transmission portion. The reception portion receives a communication data from a different one of the communication apparatus. The update portion updates a value of the counter. The code generation portion generates a message authentication code based on the communication data received by the reception portion, the value of the counter, and a common key. The determination portion determines whether the message authentication code generated by the code generation portion matches a message authentication code set in the communication data. The transmission portion transmits a synchronization request when a number of times that the determination portion determines a mismatch between the message authentication codes becomes equal to or more than a predetermined number of mismatches.