Abstract: A method for operating a steering device of a motor vehicle according to the steer-by-wire principle, wherein the steering device comprises a rotatable steering handle, in particular steering wheel, to provide a steering request, wherein the steering device comprises an electric machine mechanically coupled to the steering handle, wherein the electric machine is actuated in an active state of the steering device to generate a reset torque counteracting a rotational movement of the steering handle, and wherein the machine is control free in an idle state of the steering device. It is provided that, in the idle state, an electrical voltage of the electric machine is sensed to detect a rotation of the steering handle, and that, if the electrical voltage at least reaches a predetermined threshold value, and in particular exceeds it, the active state is activated.

Abstract: A method for secure, high-availability transmission of messages includes communicating a transmission of messages on a first channel secured using a message authentication code on a redundant private databus. The redundant private data bus is configured to connect a first control unit and a second control unit. The method further includes communicating a transmission of messages on a second channel without protection using the message authentication code on the redundant private databus. The messages transmit signals. Signals from the first channel are used in a first operating state, and signals from the second channel are used in a second operating state.