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

A method for checking a data transportation between a first data processing device and a second data processing device in an apparatus, the method comprising:

• sending, by the first data processing device, a transmitting payload to the second data processing device through a first communication connection, wherein the transmitting payload is divided into payload blocks and the first communication connection is realized between a first interface unit of the first data processing device and a first interface unit of the second data processing device;
• sending, by a first authentication unit of the first data processing device, a request to the first interface unit of the first data processing device, wherein the request requires data units in randomly selected positions of randomly selected and identifiable payload blocks;
• sending to the first interface unit of the second data processing device, by the first authentication unit of the first data processing device, the request through a second communication connection, wherein the second communication connection is realized between a second interface unit of the first data processing device and a second interface unit of the second data processing device;
• extracting, by a first authentication assembly of the first interface unit of the first data processing device, first response data from the transmitting payload based on the request;
• receiving, by the first authentication unit, the first response data from the first interface unit of the first data processing unit;
• receiving, by the first authentication unit, second response data from the second data processing device, wherein the second response data is extracted by a second authentication assembly of the first interface unit of the second data processing device from a receiving payload based on the request;
• and
• determining, by the first authentication unit, a successful check result if the first response data match the second response data.

A motor vehicle comprises a first data processing devices and a second processing device, wherein the first data processing device is configured to:

• send, by the first data processing device, a transmitting payload to the second data processing unit through a first communication connection, wherein the transmitting payload can be divided into payload blocks and the first communication connection is realized between a first interface unit of the first data processing device and a first interface unit of the second data processing device;
• send, by a first authentication unit of the first data processing device, a request to the first interface unit of the first data processing device, wherein the request requires data units in randomly selected positions of randomly selected and identifiable payload blocks;
• send to the first interface unit of the second data processing device, by the first authentication unit of the first data processing device, the request through a second communication connection, wherein the second communication connection is realized between a second interface unit of the first data processing device and a second interface unit of the second data processing device;
• extract, by a first authentication assembly of the first interface unit of the first data processing device, first response data from the transmitting payload based on the request;
• receive, by the first authentication unit, the first response data from the first interface unit of the first data processing device;
• receive, by the first authentication unit, a second response data from the second data processing device, wherein the second response data is extracted by a second authentication assembly of the second first interface unit from a receiving payload based on the request;
• and
• determine, by the first authentication unit, a successful check result if the first response data match the second response data.