I'm sorry, but no. No, most manufacturers update processes aren't actually secure in any meaningful way. Tesla's OTA process seems to use (I've not checked it m

I'm sorry, but no. No, most manufacturers update processes aren't actually secure in any meaningful way. Tesla's OTA process seems to use (I've not checked it myself) web standards, encryption, and signatures to verify that the OTA update is correct. The "Physical ethernet cable" that is used by traditional manufacturers can be done by any hobo on the street, in pretty much the same time. It's really only a matter of time before a script-kiddie-ready device that you plug-in and starts the car shows up; There's no security, no signature verification, etc. on the traditional manufacturers updates.