Privacy preservation and secure data sharing scheme in fog based vehicular ad-hoc network

Abstract

Due to the increase in vehicle numbers and various services, such as exchanging messages between vehicles under different traffic conditions and in an emergency, the vehicular cloud computing (VCC) has drawn significant attention. The current centralized system has the computation and safety requirements such as secure storage, authentication, access control, availability over alternative network connections, and a real-time summary of the data flow. The traditional method includes the transfer of data for processing from the edge node to a centralized server that reduces the available bandwidth and increases the latency across the network. Transmission of the vast amount of data from the edge devices to a central system increases the chances of getting a security breach that leads to compromised information and data loss. In this paper, we propose a Privacy Preservation and Secure Data Sharing Scheme in Fog Based Vehicular Ad-hoc Network by analyzing critical information and employing data confidentiality with the help of Hierarchical Attribute-Based Encryption (HABE) with an efficient key exchange. The proposed scheme also uses symmetric encryption and a Hash-based Message Authentication Code (HMAC) computation with the shared secret key to secure the message transmission between vehicles. It also provides fine-grained access control before outsourcing data to the cloud server to ensure privacy depends on ownership to reduce the number of data forwarded to the cloud server with a short period and decreases bandwidth requirements due to fast analytics at the edge. Assessment of the proposed scheme is done by finding the key generation computation cost on attribute authority, message broadcasting computation cost for vehicles, and message decryption computation cost for vehicles.