The car is quickly becoming a system of highly complex, converged networks, consisting of the onboard internal network that operates the car, the external communications networks that provide a host of productivity, entertainment and commercial services, and lastly the extravehicular network that allows smart cars to interface with infrastructure and other cars. To provide suitable cyber protection and ensure consumer confidence, automobile manufacturers need to design and deploy technology with a security-first mindset. Security systems need to span across communications standards, devices, and networks. Connected cars require several different security solutions working as a single system and therefore need to include strategic segmentation of key function domains, such as powertrain, telematics and infotainment to ensure that threats are automatically contained and mitigated. This session will review these broader trends and show how the on-chip security functions of the Renesas R-Car H3 helps to provide security policy management and automated protection of the powertrain and communication domains for connected cars.