Info-Chain: Reputation-Based Blockchain for Secure Information Sharing in 6G Intelligent Transportation Systems
Kun Yan, Wenping Ma, Qi Yang, Shaohui Sun, W. P. Wang
Abstract
The widespread deployment of 5G networks has accelerated the development of Internet of Vehicles (IoV), laying the foundation for the development of intelligent transportation systems (ITSs) in future 6G networks. The unprecedented intelligence of 6G ITS is expected to enable the automation of vehicles, seamless collaboration, and intelligent management. High-volume information sharing plays a crucial role in this case, and its security and reliability becoming important cornerstones for 6G ITS. Without adequate security protection and trusted environments may result in unreliable and inefficient network services. In this article, we propose a reputation management-based blockchain, Info-Chain, for secure, trustworthy, and privacy-preserving information sharing in 6G ITS. Furthermore, to accommodate the distributed traffic environment in 6G ITS, we construct a novel consensus mechanism for Info-Chain, denoted as Proof of Reputation and sum (PoRs), which combines reputation with traffic environmental factors as competitive conditions. Finally, we propose a dynamic incentives and punishments mechanism that utilizes evolutionary game theory to guide vehicles to actively and honestly participate in information sharing. The security analysis shows that the proposed mechanism is capable of resisting common attacks, and the simulation result demonstrates that the proposed scheme not only enables efficient and secure information sharing in 6G ITS but also encourages vehicles to actively participate in information sharing.