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.

翻译：车载自组织网络（VANETs）使道路使用者和公共基础设施能够共享信息，从而提升道路运行效率和驾驶体验。然而，此类网络易受行为不当的授权用户攻击。信任管理依据信任评分应对授权用户发起的攻击。通过在验证过程中取消信任指标的传播，可降低通信开销和响应时间。本文提出一种基于防篡改设备（TPD）的新型信任管理框架，在发送端车辆侧控制信任，以规范驾驶员行为。此外，仅在VANET网络中出现冲突信息时，才需进行反馈传播。若发生冲突，路侧单元（RSU）将采用加权投票系统判定信息源是否可信。该框架与集中式信誉方法进行了对比评估，结果表明其性能优于后者。