Abstract: Computer implemented methods and devices for detecting an intrusion in a communication on a shared medium, in particular a bus. A first method includes receiving a message including a first freshness value, receiving a message including a second freshness value, wherein the first freshness value and the second freshness value are correct expected freshness values, receiving a message including a warning that the message including the second freshness value is a replay message comprising a freshness value sent earlier on the shared medium, and detecting the intrusion upon receipt of the warning.

Abstract: A subscriber station for a serial bus system. The subscriber station includes: a communication control device for controlling a communication of the subscriber station with at least one other subscriber station of the bus system and for generating a transmission signal according to a frame; a transmitting/receiving device which is designed for the serial transmission of the transmission signal generated by the communication control device to a bus of the bus system, and which is designed for the serial reception of signals from the bus; and a marking module for evaluating whether or not a frame received from the bus is permitted to occur on the bus, and for marking a frame with a marking in such a way that the transmitting/receiving device transmits the marking to the bus in order to communicate the result of the evaluation to the at least one other subscriber station.

Abstract: A method for processing data associated with a communication system. The method includes: managing a set of, for example, one or more, values for a first parameter which characterizes a timeliness of a message that can be received via the communication system, wherein for example, the set has at least one first subset that has, for example one or more, possible values for the first parameter and at least one second subset that has, for example one or more, historical values for the first parameter, evaluating a parameter value of the received message characterizing a timeliness of a message received via the communication system based on the set.

Abstract: A method and a device for sending and/or receiving messages in a bus communication. The device includes a filter that is configured to restrict sending and/or receiving of messages in the bus communication to messages of authenticated participants of the bus communication, and to allow receiving a message for authenticating the device as participant of the bus communication, and a hardware security subsystem that is configured to authenticate the device as participant of the bus communication depending on the message for authenticating the device.

Abstract: A method for processing data associated with a serial bus system. The method includes: providing an indication characterizing at least one aspect of a control plane for a security protocol for the serial bus system, transmitting the indication on the bus system.

Abstract: A method for processing data associated with messages transmittable via a bus system. The method includes: providing multiple filter groups, each filter group of the multiple filter groups including at least one filter rule, for example, for at least some of the messages, filtering at least one message with the aid of at least two different filter groups of the multiple filter groups.

Abstract: A method for processing data associated with a data frame. The method includes: providing output data with a plurality of information elements, for example in the form of a bit vector, for example for a device for executing cryptographic functions, wherein a first information element of the plurality of information elements has a length of 11 bits and characterizes first identification information associated with a data frame, wherein a second information element of the plurality of information elements has a length of 18 bits and is designed to characterize optional second identification information associated with the data frame, and, optionally, using the output data.

Abstract: An apparatus for transmitting data over a bus system, having a storage device for at least temporary storage of messages transmittable over the bus system. The apparatus is designed to check at least one message, stored in the storage device, for at least one criterion and to alter at least one portion of the message based on the check.

Abstract: A subscriber station for a serial bus system. The subscriber station includes: a communication control device for controlling a communication of the subscriber station with at least one other subscriber station of the bus system and for generating a transmission signal according to a frame; a transmitting/receiving device which is designed for the serial transmission of the transmission signal generated by the communication control device to a bus of the bus system, and which is designed for the serial reception of signals from the bus; and a marking module for evaluating whether or not a frame received from the bus is permitted to occur on the bus, and for marking a frame with a marking in such a way that the transmitting/receiving device transmits the marking to the bus in order to communicate the result of the evaluation to the at least one other subscriber station.

Abstract: A communication module for a user of a serial bus. The communication module is configured to receive a first message stream, encompassing a multitude of messages, via a first interface, and to provide a respective message of the first message stream as a message of a second message stream, as a function of a configuration state and as a function of at least one property of the respective message of the first message stream, via a second interface.

Abstract: An apparatus for transmitting data over a bus system, having a storage device for at least temporary storage of messages transmittable over the bus system. The apparatus is designed to check at least one message, stored in the storage device, for at least one criterion and to alter at least one portion of the message based on the check.

Abstract: A method for processing data associated with messages transmittable via a bus system. The method includes: providing multiple filter groups, each filter group of the multiple filter groups including at least one filter rule, for example, for at least some of the messages, filtering at least one message with the aid of at least two different filter groups of the multiple filter groups.

Abstract: A communication module for a user of a serial bus. The communication module is configured to receive a first message stream, encompassing a multitude of messages, via a first interface, and to provide a respective message of the first message stream as a message of a second message stream, as a function of a configuration state and as a function of at least one property of the respective message of the first message stream, via a second interface.