  Vehicular Ad Hoc Networks (VANETs) enable road users and public
infrastructure to share information that improves the operation of roads and
driver experience. However, these are vulnerable to poorly behaved authorized
users. Trust management is used to address attacks from authorized users in
accordance with their trust score. By removing the dissemination of trust
metrics in the validation process, communication overhead and response time are
lowered. In this paper, we propose a new Tamper-Proof Device (TPD) based trust
management framework for controlling trust at the sender side vehicle that
regulates driver behaviour. Moreover, the dissemination of feedback is only
required when there is conflicting information in the VANET. If a conflict
arises, the Road-Side Unit (RSU) decides, using the weighted voting system,
whether the originator is to be believed, or not. The framework is evaluated
against a centralized reputation approach and the results demonstrate that it
outperforms the latter.
