Abstract: The invention relates to a device for ascertaining data for determining a velocity of a vehicle having a magnet, which is attachable to a wheel and executes a circular movement upon rotation of the wheel. Furthermore, a sensor unit is provided for recording signals due to the circular movement of the magnet. The sensor unit has at least one sensor for measuring a quantitative magnetic field strength change. In this case, the sensor is configured to sample the magnetic field strength change at a sampling frequency of at least 200 Hz. In addition, the invention relates to a method for ascertaining data for determining a velocity of a vehicle.

Abstract: A communication device for encrypted transmission of information via unencrypted transmission paths has at least one loudspeaker, one microphone, one audio processing facility, one encryption facility, and one transmission facility. Information is encrypted by the encryption facility and transmitted via unencrypted transmission paths by the transmission facility by further communication instruments. Thus, flexible use on the basis of the various communication instruments which can be used for encrypted transmission is made possible.