CAN network by its nature is supposed to be a "trusted network" with no external Inputs available (Air Gapped). But yeah, because headlights and blinkers needllessly complicated, cough er, need data uplinks.... totally NOT to check with Toyota if you've subscribed to their monthly "safety package" for $7.99, yeah, we've sort violated the Air Gap principal.
Here's the problem everyone needs to pay attention to: If you demand Encrypted OR Signed CAN Bus, you will ABSOLUTELY get it from the manufacturers in the name of security. They will _gladly_ lock out the CAN bus so no third party accessories or diagnostic tools can work with your car.
So be careful what you scream for. We already have enough un-repairable items.
Here's the problem everyone needs to pay attention to: If you demand Encrypted OR Signed CAN Bus, you will ABSOLUTELY get it from the manufacturers in the name of security. They will _gladly_ lock out the CAN bus so no third party accessories or diagnostic tools can work with your car.
So be careful what you scream for. We already have enough un-repairable items.