Blockchain-Based Asynchronous Authentication and Key Agreement Scheme for Securing VANETs

This research proposes a new authentication and key agreement (AKA, a process where devices verify each other's identity and create shared secret keys for secure communication) scheme for VANETs (vehicular ad hoc networks, where cars communicate directly with each other without central infrastructure). The scheme uses a consortium blockchain (a shared, distributed ledger controlled by a group of organizations rather than one central authority) to work in asynchronous environments, where messages may arrive out of order or with delays, and employs lightweight cryptographic techniques (mathematical methods that require less computing power) to reduce system overhead.