This letter presents a blockchain-based multi-path mobile access point (MAP) selection strategy for secure 5G vehicular ad-hoc networks (VANETs). The proposed method leverages blockchain technology for decentralized, transparent, and secure MAP selection, while the multi-path transmission strategy enhances network reliability and reduces communication delays. A trust-based attack detection mechanism is integrated to ensure network security. Simulation results demonstrate that the proposed algorithm reduces both handover frequency and average communication delay by over 80%, and successfully identifies and excludes more than 95% of Sybil nodes, ensuring reliable and secure communication in highly dynamic vehicular environments.

翻译：本文提出了一种基于区块链的多路径移动接入点选择策略，用于保障5G车联网的安全通信。该方法利用区块链技术实现去中心化、透明且安全的移动接入点选择，同时通过多路径传输策略提升网络可靠性并降低通信时延。方案集成了基于信任的攻击检测机制以确保网络安全。仿真结果表明，所提算法能将切换频率和平均通信时延降低80%以上，并能成功识别并排除超过95%的Sybil节点，从而在高度动态的车载环境中保障可靠且安全的通信。