In the last decade, there has been growing interest in Vehicular Ad Hoc NETworks (VANETs). Today car manufacturers have already started to equip vehicles with sophisticated sensors that can provide many assistive features such as front collision avoidance, automatic lane tracking, partial autonomous driving, suggestive lane changing, and so on. Such technological advancements are enabling the adoption of VANETs not only to provide safer and more comfortable driving experience but also provide many other useful services to the driver as well as passengers of a vehicle. However, privacy, authentication and secure message dissemination are some of the main issues that need to be thoroughly addressed and solved for the widespread adoption/deployment of VANETs. Given the importance of these issues, researchers have spent a lot of effort in these areas over the last decade. We present an overview of the following issues that arise in VANETs: privacy, authentication, and secure message dissemination. Then we present a comprehensive review of various solutions proposed in the last 10 years which address these issues. Our survey sheds light on some open issues that need to be addressed in the future.

在过去的十年中，人们对车载Ad hoc网络（VANET）的兴趣与日俱增。如今，汽车制造商已经开始为车辆配备复杂的传感器，这些传感器可以提供许多辅助功能，例如避免前撞，自动车道跟踪，部分自动驾驶，暗示性换道等。这种技术进步使VANET的采用不仅可以提供更安全，更舒适的驾驶体验，而且还可以为驾驶员和车辆乘客提供许多其他有用的服务。但是，对于VANET的广泛采用/部署，隐私，身份验证和安全消息分发是需要彻底解决和解决的一些主要问题。鉴于这些问题的重要性，在过去的十年中，研究人员在这些领域投入了大量的精力。我们概述了VANET中出现的以下问题：隐私，身份验证和安全消息分发。然后，我们对过去10年提出的解决这些问题的各种解决方案进行了全面回顾。我们的调查揭示了一些将来需要解决的未解决问题。