Data diodes exist and have been used in high security or other risky cases when one circuit or bus absolutely has to be isolated except for one way communication.
But how can you include adequate firewalls in a car that, for example, receives OTA updates for autonomous driving software? It is inherent in any such system that incoming signals are received and that the software that may be affected by those signals has access to pretty much everything.
But how can you include adequate firewalls in a car that, for example, receives OTA updates for autonomous driving software? It is inherent in any such system that incoming signals are received and that the software that may be affected by those signals has access to pretty much everything.