Security Protocols for Ethernet-Based In-Vehicle Communication

Automotive Electrical and Electronic (EIE) archi-tectures are rapidly evolving. With the transition towards au-tomotive Ethernet, service-oriented communication, and zonal architectures, secure in-vehicle communication becomes even more critical. In this paper, we systematically analyze the four most prominent security protocols considered for in-vehicle communication in E/E architectures: Secure Onboard Commu-nication (SecOC), Media Access Control Security (MAC sec), Internet Protocol Security (IPsec), and Transport Layer Security (TLS). In addition, we consider a security extension specifically proposed for an automotive communication middleware. Our analysis includes a formal security analysis of our combination of MAC sec and access control for the MACsec-based architecture. We compare the protocols and give recommendations for their usage.