Fengyi: Trusted Data Sharing in VANETs with Blockchain

Abstract

Superior to traditional vehicles, intelligent vehicles (IV) can share data in Vehicular Ad-Hoc Networks (VANETs) to provide a more comfortable and safer driving experience, based on the assumption that the data sharing is accountable and reliable. However, trusted data sharing in VANETs is always a paramount concern. We define that the trusted data sharing includes the three properties, namely data sharing accountability, privacy preservation, and transmission confidentiality. To address the problem, we propose a comprehensive solution including the trusted ledger model (TLM) and implement the Fengyi system to verify it. The TLM is a model that ensures the consistency of multiple data resources in a low trust distributed computing environment. Then, distributed Fengyi ledgers based on the TLM are proposed to keep data sharing accountable and private in VANETs. The Fengyi system is designed and implemented to provide authentication and encrypted communication services with the ledgers. Finally, we deploy the Fengyi system on three different platforms, checking the effectiveness and efficiency of the Fengyi system. The results show that the system can ensure trusted data sharing in VANETs, and the time cost for the verification of data sharing on-road is average 253.33μs, 38% lower than that in recent research.