SDN based Blockchain Architecture for Security Performance of VANETs

Vehicular ad hoc networks (VANETs) are used in intelligent transportation systems to provide safety and security with a reduction in traffic jams using vehicle-to-vehicle (V2V) and vehicle-to-roadside (V2R) unit communications. During the communication, nodes are always under various security threads. In order to reduce the possibility of these attacks and to normalize traffic flow in the network, a software-defined network (SDN) is used. SDN will improve centralized visibility as all the underlying open flow switches are connected to the controller, which will reduce the routing load in the network. SDN doesn’t provide a high level of security to the network, hence protocols like encryption, hashing, etc. are applied to the VANET. In the paper, SDN based blockchain algorithm is applied, which coordinates network traffic and improves the overall security of the network. Security analysis of the proposed algorithm demonstrates that blockchain with encrypted SDN removes more than 90% of the network attacks as compared to its non- blockchain SDN.