Title:
COMMUNICATION DEVICE, COMMUNICATION ABNORMALITY DETERMINATION METHOD PERFORMED BY COMMUNICATION DEVICE, AND PROGRAM FOR CONTROLLING COMMUNICATION DEVICE
Document Type and Number:
Japanese Patent JP2022086429
Kind Code:
A
Abstract:
To accurately detect unauthorized communication by a non-genuine communication device.SOLUTION: An ECU (10) transmits data information (15) including data and a checksum obtained by calculating the data according to a predetermined calculation rule to a communication line (L). The ECU (10) includes a port (11) connected to the communication line (L) and a calculation unit (12) connected to the port (11). The calculation unit (12) compares the signal level of transmission data information Tx transmitted by the ECU (10) to the communication line (L) via the port (11) and the signal level of communication line data information Rx in the communication line (L). When the signal levels do not match, the checksum included in the communication line data information Rx is used to determine the presence or absence of unauthorized communication.SELECTED DRAWING: Figure 1
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Inventors:
TAKAHASHI SHOGO
Application Number:
JP2020198428A
Publication Date:
June 09, 2022
Filing Date:
November 30, 2020
Export Citation:
Assignee:
TOKAI RIKA CO LTD
International Classes:
H04L12/28; B60R16/023
Attorney, Agent or Firm:
Fukami patent office