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Patent Searching and Data


Title:
COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/026359
Kind Code:
A1
Abstract:
A communication device is provided. A receiving unit (12) of a communication device (10) receives communication data from another communication device. When the receiving unit receives the communication data from the other communication device, an updating unit (22) updates a counter to match the value of a counter of the other communication device. A code generating unit (16) generates a message authentication code on the basis of the communication data received by the receiving unit, the counter, and a common key. A determining unit (18) determines whether the message authentication code generated by the code generating unit matches a message authentication code set in the communication data received by the receiving unit. If the determining unit determines successively, a number of times, that the message authentication codes do not match, and the number of times reaches or exceeds a prescribed successive non-matching number of times, then the transmitting unit (14) transmits a synchronization request causing the counter values to be matched to one another.

Inventors:
SUGANO YASUHARU (JP)
SUGASHIMA TAKESHI (JP)
Application Number:
PCT/JP2016/072875
Publication Date:
February 16, 2017
Filing Date:
August 04, 2016
Export Citation:
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Assignee:
DENSO CORP (JP)
International Classes:
H04L9/32; B60R16/023; H04L9/08; H04L12/40
Foreign References:
JP2002198916A2002-07-12
JP2007500972A2007-01-18
JPH09200197A1997-07-31
JPS59214372A1984-12-04
Other References:
KEISUKE TAKEMORI: "In-vehicle Network Security Using Secure Elements", IEICE TECHNICAL REPORT, vol. 114, no. 508, 2 March 2015 (2015-03-02), pages 73 - 78
Attorney, Agent or Firm:
JIN Shunji (JP)
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