A Decentralized Ride-Hailing Mode Based on Blockchain and Attribute Encryption

With the development of smart transportation, ride-hailing applications have become an essential part of people’s lives. These ride-hailing apps provide convenience of contacting taxi for passengers. However, most present ride-hailing or ride-sharing systems rely on a trusted third party. It makes them be attacked vulnerably. A decentralized block-chain-based ride-hailing mode with attribute encryption is proposed in this paper. Attribute-based encryption is applied to ensure the drivers who meet the passenger’s requirements can obtain the passenger’s order in this mode. After the transaction has completed, the transaction information is saved on the blockchain. This mode supports the investigation of historical records via the blockchain technology. Besides, a new payment protocol is used in this mode. The new payment protocol is based on trip distance. It applies smart contract and zero-knowledge set membership proof. The reputation of drivers based on drivers’ past behavior is designed. The driver’s reputation will be updated after the transaction is completed. Passengers can choose a driver with high reputation. Each phase of this mode is simulated in our test net of Ethereum. The results prove that this ride-hailing mode is efficient.