Method and Apparatus for Identifying an Inadmissible Message of a Manipulated Control Device of a Vehicle by Means of a Second Control Device of the Vehicle

A method for identifying an inadmissible message of a manipulated control device of a vehicle using a second control device of the vehicle, the method comprising:

• receiving a first message of a first control device of the vehicle via a first bus system using the second control device of the vehicle;
• determining a bus system, which is associated with the received first message, using the second control device, and
• if the determined bus system differs from the first bus system, then determining the received first message as an inadmissible message of the first bus system by means of the second control device;
• identifying the first control device as the manipulated control device using the second control device if the received first message has been identified as an inadmissible message;
• and
• providing an alarm message to a vehicle-external server using the second control device if the received first message has been identified as an inadmissible message.