An Efficient Revoking Scheme Based On Trusted Authority and Blockchain in Vanets

Abstract: 
     Road accidents and traffic congestion have a profound effect on road safety, leading to substantial loss of life and property. Hence, there is a need for the implementation of measures to ensure road safety and efficient traffic management. Vehicular Ad-hoc Networks (VANETs) are wireless networks in connected automobiles that aim to enhance traffic management on roads, ensuring both driver and passenger comfort and safety. Nevertheless, it is essential to develop a revocation scheme that can safeguard vehicles' confidentiality and defend them from any breaches. This article introduces a method that effectively revokes vehicles that engage in hazardous behaviors, ensuring the system remains secure and stable. We promptly remove a vehicle from the system once we confirm its incorrect behavior. Additionally, the scheme appends the relevant transactions to the blockchain. The proposed revocation approach, which uses blockchain technology, allows vehicles and Trusted Authorities (TA) to verify the authenticity of vehicles while maintaining privacy. The proposed system enables the preservation of privacy during revocation by being implemented on a decentralized network. The proposed system ensures privacy, confidentiality, integrity, and openness when revoking vehicles in VANETs.