Communication network for a motor vehicle, motor vehicle and method for communicating data in a communication network

A method for redundantly communicating data in a communication network enabled to communicate with a motor vehicle, the method comprising:

• providing at least one cryptography processor in a cryptography layer of a communication network having at least two parallel communication paths including a main path and a fallback path, which provide redundant communication of the data in the communication network;
• providing at least two different cryptography algorithms for the at least one cryptography processor designed to cryptographically protect the data to be communicated along the at least two parallel communication paths by virtue of the at least one cryptography processor applying a different one of the at least two different cryptography algorithms to the data for each of the communication paths, and
• communicating the data that is cryptographically protected through the at least two parallel communication paths.