  With the rising interest of expedient, safe, and high-efficient
transportation, vehicular ad hoc networks (VANETs) have turned into a critical
technology in smart transportation systems. Because of the high mobility of
nodes, VANETs are vulnerable to security attacks. In this paper, we propose a
novel framework of software-defined VANETs with trust management. Specifically,
we separate the forwarding plane in VANETs from the control plane, which is
responsible for the control functionality, such as routing protocols and trust
management in VANETs. Using the on-demand distance vector routing (TAODV)
protocol as an example, we present a routing protocol named software-defined
trust based ad hoc on-demand distance vector routing (SD-TAODV). Simulation
results are presented to show the effectiveness of the proposed
software-defined VANETs with trust management.
