In one implementation, a method for providing end-to-end communication security for a controller area network (CANbus) in an automotive vehicle across which a plurality of electronic control units (ECU) communicate is described. Such an automotive vehicle can include, for example, a car or truck with multiple different ECUs that are each configured to control various aspects of the vehicle's operation, such as an infotainment system, a navigation system, various engine control systems, and/or others.

A communication device including a reception section to receive from each of other communication devices a message appended with authentication information generated by the other communication device, an authentication section to, for each of the messages received by the reception section, authenticate the message based on the authentication information appended to the message, and a determination section to, for each of the other communication devices or for each type of the message, determine an abnormal-communication state in cases in which authentication has failed less than a specific number of times from among plural authentications performed by the authentication section for a corresponding respective plural of the messages, and determine that there is not the abnormal-communication state in cases in which authentication has failed the specific number of times or greater from among the plural authentications performed by the authentication section for the corresponding respective plural messages.

A user station for a serial bus system. The user station includes a communication control device for controlling a communication of the user station with at least one other user station, and a transceiver device for transmitting a transmission signal, generated by the communication control device, onto a bus, so that for a message that is exchanged between user stations of the bus system, the bit time of a signal transmitted onto the bus in the first communication phase is different from a bit time of a signal transmitted in the second communication phase. The communication control device generates the transmission signal according to a frame in which a field for a header check sum and a field for a frame check sum are provided, and computers the header check sum from all bits in the header of a frame that is formed for the message, except fixed stuff bits.

A detection device to be used in an in-vehicle network including a CAN (Controller Area Network) bus and a plurality of function units connected to the CAN bus includes: a measurement unit configured to measure a signal waveform of a frame transmitted in the CAN bus; a calculation unit configured to calculate a plurality of kinds of feature amounts of the signal waveform measured by the measurement unit; and a detection unit configured to detect an abnormality regarding the CAN bus, based on each of the feature amounts calculated by the calculation unit.

An in-vehicle communication system includes a first relay apparatus installed in a first area of a vehicle, and a second relay apparatus installed in a second area and are connected via a communication main line. A main control apparatus and an auxiliary control apparatus are connected to the first relay apparatus and a controlled apparatus is connected to the second relay apparatus, each connected via a communication branch line. The first input apparatus is installed in the first area and inputs information to the main control apparatus and the auxiliary control apparatus. The second input apparatus is installed in the second area and inputs information to the main control apparatus and the auxiliary control apparatus via the first relay apparatus and the second relay apparatus. The first relay apparatus and the controlled apparatus communicate via an auxiliary communication line provided into both the first area and the second area.

Hybrid wire-fiber data networks that include wire-fiber transceivers protected against environmental interferences. In some embodiments, a hybrid-wire-fiber data network of this disclosure provides a fiber-optic link between portions of one or more wired networks. In some embodiments, a hybrid wire-fiber data network of this disclosure includes a fiber-optic link that relies only on message-priority arbitration performed on wired portions of one or more wired networks. In some embodiments, a wire-fiber transceiver of this disclosure includes electromagnetic environment (EME) protective circuitry for one or both of input power and input signals. In some embodiments, a wire-fiber transceiver of this disclosure is configured for use with a controlled area network media-access protocol (CAN) and/or a derivative of CAN. Various data communication and other methods are also disclosed in addition to hybrid wire-fiber data networks and components thereof.

A method used in an on-board network system, having electronic controllers that exchange messages and a fraud-detecting electronic controller. The method includes receiving an inquiry for a vehicle status indicating whether a vehicle in which the fraud-detecting electronic controller is installed is running from an external device, transmitting the vehicle status to the external device, and determining whether a message transmitted conforms to fraud detection rules. The method also includes receiving from the external device the delivery data, including updated fraud detection rules and network type information indicating a network type that the updated fraud detection rules are to be applied The method further includes determining whether the vehicle is running, and whether the network type information indicates a drive network that is connected to an electronic controller related to travel of the vehicle. When the network type information does not indicate the drive network, updating the fraud detection rules.

Provided is an onboard apparatus configured to connect to an other onboard apparatus via a first transmission path and a second transmission path, which are transmission paths of different types, the onboard apparatus comprising a control unit; and a transmission unit configured to transmit communication information to the other onboard apparatus, wherein the control unit, depending on contents of the communication information, selects at least one from among the first transmission path and the second transmission path as the transmission path to use to transmit the communication information and causes the transmission unit to transmit the communication information via a selected transmission path.

A method for vehicle diagnostics, a diagnostic device, and a non-transitory computer-readable storage medium are provided in the present disclosure. In the method, the diagnostic device obtains a diagnostic request including vehicle information of a vehicle to-be-diagnosed, and determine a communication protocol which is applied in the vehicle to-be-diagnosed according to the vehicle information. After obtaining a diagnostic instruction including a diagnostic function instruction and a communication protocol corresponding to the diagnostic function instruction, the diagnostic device determines a communication link corresponding to the diagnostic function instruction according to the communication protocol corresponding to the diagnostic function instruction, sends the diagnostic function instruction to the vehicle to-be-diagnosed through the communication link corresponding to the diagnostic function instruction, obtains feedback data from the vehicle to-be-diagnosed, and performs diagnostics.

A Controller Area Network (CAN) system, method, and circuit are provided with a dual mode bus line termination circuit connected between signal lines of a serial bus and optimized for both differential and single-ended communication modes over the serial bus, where the dual mode bus line termination circuit includes first and second resistance termination paths connected in parallel between first and second bus wires of the serial bus to provide an odd mode termination impedance (R.sub.ODD) that matches an impedance of the serial bus when operating in the differential communication mode, and to also provide an even mode termination impedance (R.sub.EVEN) that matches an impedance of the serial bus when operating in the single-ended communication mode.