QS-BTrust: A Quantum-Secure Privacy-Preserving Protocol With Revocation for Trusted Broadcasting in Integrated Vehicular Networks

QS-BTrust is a new security protocol designed for Integrated Vehicular Networks (IVNs, which are connected vehicle communication systems) that authenticates broadcast messages while resisting attacks from quantum computers. The protocol combines Physical Unclonable Functions (PUFs, unique digital fingerprints built into hardware), post-quantum digital signatures (cryptographic techniques that remain secure even with quantum computers), and a Hashgraph-based system to verify messages with low overhead and support revoking compromised vehicles without slowing down traffic.