Blockchain-based solutions for security, privacy, and trust management in vehicular networks: a survey

Vehicular networks are considered as one of the most pertinent research topics in intelligent transportation systems and anchors for future smart city environment due to the ability to provide road safety and precautionary measures for the drivers and passengers. Due to the characteristics of vehicular networks, security, privacy, and trust management are challenging issues. Blockchain is an emerging decentralized and distributed computing platform that facilitates recording and tracking resources without the need for the centralized trusted authority. Therefore, the potential for security improvements in vehicular networks is enormous. The paper aims to review, classify, and discuss a range of the proposed models in blockchain-based vehicular networks. We presented summary comparisons of the available models with their main features and objectives regarding security, privacy preservation, and trust management. To the best of our knowledge, this is the first paper that provides a survey on blockchain-based solutions for security services' improvements in vehicular networks.