METHOD FOR CHECKING THE DATA TRANSPORT ACROSS A FIRST COMMUNICATION CONNECTION BETWEEN TWO DATA PROCESSING DEVICES, SAID FIRST COMMUNICATION CONNECTION BEING REALIZED BETWEEN TWO FIRST INTERFACE UNITS, AND MOTOR VEHICLE

摘要

The application relates to a method for checking the data transport across a first communication connection between two data processing devices, said first communication connection being realized between two first interface units, wherein the payload to be transferred can be divided into payload blocks and there is at least one second communication connection between the data processing devices, which is established by means of second interface units, and wherein, in order to implement a challenge-response authentication, a request requiring retrieval of randomly selected data units from identifiable, randomly selected payload blocks of the payload is sent as a challenge by an authentication unit to the first interface units by means of the second communication connection, an authentication assembly of each of the first interface units extracts the requested response data from the payload and transmits the same back to the authentication unit and a successful check is determined if the response data match.