Lauser, TimmTimmLauserZelle, DanielDanielZelleKrauß, ChristophChristophKraußKern, DustinDustinKernVölker, LarsLarsVölker2024-07-252024-07-252024https://publica.fraunhofer.de/handle/publica/47208010.1109/VNC61989.2024.10575984Automotive 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 Communication (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.enconference paper