A method for providing a Proof-of-Work concept in a vehicle is provided. The vehicle includes a network including at least three control units, where a first control unit sends a first message to a second control unit, the second control unit sends a second message including the first message to a third control unit, and the third control unit determines a Proof-of-Work for the second message based on at least one vehicle-specific characteristics of the network. Also, an corresponding system as well as a vehicle including such system are provided.