In an anomaly determination method for determining an anomaly in a received message, a plurality of messages which include messages that are periodic and each of which includes a first field having a fixed value and a second field having a variable value are each received as the received message, and one of a plurality of combinations to be used for determination each of which includes at least one of a plurality of anomaly determinations including an anomaly determination utilizing a reception timing based on the periodicity or the number of received messages, an anomaly determination utilizing the first field, and an anomaly determination utilizing the second field, is selected according to one or more criteria among available execution time of the anomaly determination method, a load amount, a data amount, and the number of messages.

Systems and methods for identifying the source of a message transmitted on the CAN bus of a vehicle, by creating a unique signature for each ECU. The system is further configured to detest malicious activities on a CAN bus system having a given physical configuration. The signature of an ECU is created based on the non-linearity of the CAN bus, by determining from at least one pulse of a read message a training-signature that includes a pair of sub-signatures: a rising-sub-signature of the rising response, and a falling-sub-signature of the falling response, as viewed by said message generating ECU. By reading a plurality of messages from the ECUs operationally integrated on the CAN bus system, a classification & prediction methodology is used to create, for each message generating ECU, from the respective training-signatures, a unique ECU-signature.

A calibration control component within a transmit (TX) or receive (RX) device executes a calibration sequence to ensure reliable data transmission and reception within the device. The calibration sequence comprises a set of calibration functions that are sequentially executed. The calibration control component detects a pause function being enabled based on a pause function configuration register. Based on detecting the pause function being enabled, the calibration control component pauses execution of the calibration sequence.

This electronic device for receiving data via an asynchronous communication network including at least one elementary network, is configured to be connected to said elementary network and comprises: a receiving module configured to receive several successive data frames via the asynchronous communication network, each frame being sent over the elementary network according to a predefined sending table and with a minimum time gap between the sending time instants of two successive frames, a verification module configured, for at least two received data frames, to estimate a network jitter from the minimum time gap and reception time instants of at least two frames received on said elementary network, then to compare the estimated jitter to an authorized range of network jitter values.

An authentication system having a communications bus, a transmitter connected to the bus, and a receiver connected to the bus. A physical layer signal may be applied by the transmitter to a message on the bus for authenticating the transmitter. The physical layer signal may incorporate an identifier (ID) of the transmitter. The receiver may receive the message and decode the physical layer signal on the message. Decoding the physical layer signal on the message may reveal the ID of the transmitter sending the message. The receiver may look up the ID on a list of IDs corresponding to transmitters approved to send the message, to determine whether the ID of the transmitter sending the message matches an ID on the list. Only if the ID of the transmitter matches an ID on the list, then the transmitter may be authenticated and authorized to send the message.

A method for use in a network system is provided. The network system includes a plurality of electronic controllers that transmits and receives, via a network, a plurality of frames. The plurality of frames includes at least one control frame that instructs predetermined control to an object of control. The method receives, sequentially, the plurality of frames from the network, and determines whether the predetermined control, instructed by the control frame received in the receiving, is to be suppressed, based on a set of frames received in the receiving. The set of frames is received in the receiving within a predetermined period preceding a time of reception of the control frame.

A first bus interface is coupled to communicate with a first controller area network (CAN) bus. A second bus interface is coupled to communicate with a node device, the node device configured to communicate with a second CAN bus. A logic circuit is coupled between the first and second bus interfaces and is operable to monitor communications by the node device via the second bus interface. If the logic circuit determines that the node device is transmitting a message that is not allowed for the node device, it prevents the message from being transmitted onto the first CAN bus in response thereto.

Systems and methods for identifying the source of a message transmitted on the CAN bus of a vehicle, by creating a unique signature for each ECU. The system is further configured to detest malicious activities on a CAN bus system having a given physical configuration. The signature of an ECU is created based on the non-linearity of the CAN bus, by determining from at least one pulse of a read message a training-signature that includes a pair of sub-signatures: a rising-sub-signature of the rising response, and a falling-sub-signature of the falling response, as viewed by said message generating ECU. By reading a plurality of messages from the ECUs operationally integrated on the CAN bus system, a classification & prediction methodology is used to create, for each message generating ECU, from the respective training-signatures, a unique ECU-signature.

An unauthorized control suppression method for use in a network system is provided. The network system includes a plurality of electronic controllers that exchange, via a communication channel, a plurality of frames The plurality of frames includes at least one control frame that instructs predetermined control to an object of control. The method receives, sequentially, the plurality of frames from the communication channel, and determines whether the predetermined control, instructed by the control frame received in the receiving, is to be suppressed, based on a set of frames received in the receiving. The set of frames is received in the receiving within a predetermined period preceding a time of reception of the control frame.

Disclosed is a secure and adaptive waveforms multiplexing system in advanced-level wireless communication systems (such as 5G and beyond systems).