  The transportation system is rapidly evolving with new connected and
automated vehicle (CAV) technologies that integrate CAVs with other vehicles
and roadside infrastructure in a cyberphysical system (CPS). Through
connectivity, CAVs affect their environments and vice versa, increasing the
size of the cyberattack surface and the risk of exploitation of security
vulnerabilities by malicious actors. Thus, greater understanding of potential
CAV-CPS cyberattacks and of ways to prevent them is a high priority. In this
article we describe CAV-CPS cyberattack surfaces and security vulnerabilities,
and outline potential cyberattack detection and mitigation strategies. We
examine emerging technologies - artificial intelligence, software-defined
networks, network function virtualization, edge computing, information-centric
and virtual dispersive networking, fifth generation (5G) cellular networks,
blockchain technology, and quantum and postquantum cryptography - as potential
solutions aiding in securing CAVs and transportation infrastructure against
existing and future cyberattacks.
