A communication network for a motor vehicle, comprising at least two parallel communication paths including a main path and a fallback path, which are designed to provide a redundant communication of data in the communication network, the communication network comprising a communication layer, which has at least one communication processor (to organize the communication of the data, and a cryptography layer, which has at least one cryptography processor to cryptographically protect the data to be communicated. The at least one cryptography processor is designed to cryptographically protect the data to be communicated along the at least two parallel communication paths by applying at least two different cryptography algorithms.