  Cooperative Adaptive Cruise Control (CACC) is a pivotal vehicular application
that would allow transportation field to achieve its goals of increased traffic
throughput and roadway capacity. This application is of paramount interest to
the vehicular technology community with a large body of literature dedicated to
research within different aspects of CACC, including but not limited to
security with CACC. Of all available literature, the overwhelming focus in on
CACC utilizing vehicle-to-vehicle (V2V) communication. In this work, we assert
that a qualitative increase in vehicle-to-infrastructure (V2I) and
infrastructure-to-vehicle (I2V) involvement has the potential to add greater
value to CACC. In this study, we developed a strategy for detection of a
denial-of-service (DoS) attack on a CACC platoon where the system edge in the
vehicular network plays a central role in attack detection. The proposed
security strategy is substantiated with a simulation-based evaluation using the
ns-3 discrete event network simulator. Empirical evidence obtained through
simulation-based results illustrate successful detection of the DoS attack at
four different levels of attack severity using this security strategy.
