Method for transmitting data between components of the on-board electronics of mobile systems, and such components

Method for transmitting data between components (1, 2) of the on-board electronics of mobile systems, the data to be transmitted by the transmitting component (1) to be encrypted in real time and to be decrypted by the receiving component in real time, wherein the data to be transmitted, a signature or ID the associated on-board electronic component obtained, and the transferred data are checked on the basis of an encryption algorithm and / or the signature or identifier for authenticity, with suitable substitute data may be used instead of the transmitted data for negative checking of the authenticity of the transmitted data.