The ISO standard on diagnostic communication “Diagnostics over Internet Protocol” – or DoIP for short, is becoming increasingly prevalent in modern vehicle architectures. This is not surprising as the advantages of this innovation are obvious. On the Internet, it is normal to transmit large amounts of data – in modern vehicles, data packages of several GBytes are no longer unusual. The trend towards remote diagnostics is also unstoppable, which is why the current edition of the ISO 13400 standard details the necessary data backup. The answer: DoIP with TLS.