Abstract
Vehicular ad-hoc networks (VANETs) have several security issues such as privacy preservation, secure authentication, and system reliability. In the VANET, a vehicle communicates with other vehicles or infrastructures using broadcasting messages. These messages contain not only normal traffic information, but also identification information of sender. In general, the identification information remains encrypted to ensure privacy. However, the conventional centralized system can decrypt the identification information using private information of the sender vehicle. As a result, the central server can often be targeted by adversaries. We propose a message authentication scheme for anonymity and decentralization of information using blockchain technology. Here, we introduce public-private key and message authentication code (MAC) for secure authentication. In this paper, we adopt consensus algorithms for composing blockchain system such as the proof of work (PoW) and Practical Byzantine Fault Tolerance (PBFT) into the proposed authentication process. Finally, we demonstrate that the proposed method is secure from the attacks which include impersonation from internal attacker as well as typical attacks.
Highlights
Connected vehicles are driving securely and efficiently, avoiding accidents by communicating with various sensors and infrastructures on wireless environment
The conventional Vehicular ad-hoc networks (VANETs) consists of trusted authority (TA), base station which connects to the core network, road side units (RSUs), and on-board units (OBUs) equipped in the vehicles
We propose distributed message authentication scheme based on blockchain, the vehicles can authenticate the broadcast messages in distributed manner
Summary
Connected vehicles are driving securely and efficiently, avoiding accidents by communicating with various sensors and infrastructures on wireless environment. The RSU forwards broadcasted messages or sends information from the center to the vehicles. Several attacks such as impersonation and forgery from insiders in the network We propose improved authentication scheme for connected vehicles by adopting blockchain technology to compose decentralized vehicular network. There are three primary benefits by adopting blockchain technology in the connected vehicle network. Every vehicles can access the block and can check the guaranteed integrity of the message without help from a central system. We propose distributed message authentication scheme based on blockchain, the vehicles can authenticate the broadcast messages in distributed manner.
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