Title:
Communication device, communication method, and communication program
Document Type and Number:
Japanese Patent JP6332194
Kind Code:
B2
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.
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Inventors:
Koji Sugano
Kenji Sugashima
Kenji Sugashima
Application Number:
JP2015157232A
Publication Date:
May 30, 2018
Filing Date:
August 07, 2015
Export Citation:
Assignee:
株式会社デンソー
International Classes:
H04L9/32; B60R16/023; G09C1/00; H04L9/08; H04L12/40
Domestic Patent References:
| JP2002198916A | ||||
| JP2007500972A | ||||
| JP9200197A | ||||
| JP59214372A | ||||
| JP2007505542A | ||||
| JP200815639A |
Foreign References:
| WO2015170453A1 |
Other References:
竹森敬祐,セキュアエレメントを基点とした車載制御システムの保護,電子情報通信学会技術研究報告,日本,一般社団法人電子情報通信学会,2015年 3月 2日,Vol.114,No.508,p.73-78
Attorney, Agent or Firm:
Nagoya International Patent Service Corporation