An in-situ authentication with privacy preservation scheme for accident response in Internet of Vehicles

Real-time monitoring and handling of traffic in large urban cities, remains challenging due to a broad range of technical and non-technical factors. For example, while real-time incident reporting with supporting data (e.g., images or video feeds) can inform decision-making and facilitate traffic control, there are operational challenges (e.g., bandwidth and security). Hence, we propose an identity authentication and privacy preservation scheme based on both blockchain and ring signature. Specifically, in our approach, blockchain is leveraged to maintain anonymity yet guaranteeing traceability. We also design a new ring signature scheme based on the SM2 algorithm and analyze its security. To demonstrate utility, we evaluate our proposed approach using Ethereum smart contracts, and the findings demonstrate that our approach is efficient, supports privacy preservation, and is resilient to a range of common attacks.