  Cybersecurity has gained importance for cars that increasingly rely on
software and networks. "Smartphone on wheels" is often used as an analogy to
highlight the need for security. As a high-value target of cyberattacks, modern
smartphones implement layers of protection. Automotive embedded systems share
many similarities with smartphones. We compare the security architecture of an
iPhone and a car to identify gaps and discuss the potentials for the cars of
the future.
