Privacy-Preserving Scheme With Bidirectional Option for Blockchain-Enhanced Logistics Internet of Things

The logistics Internet of Things (Logistics IoT) is a new generation logistics model that integrates advanced network communication technology in the traditional logistics industry. It can achieve intelligent and efficient logistics management and personalized services and has attracted the attention of massive researchers and industrial practitioners. However, the leakage of logistics privacy and chaotic access control mechanisms are still noteworthy issues. In this article, we propose a privacy-preserving scheme with bidirectional option for blockchain-enhanced Logistics IoT, named PB-LIoT. The scheme is based on the blockchain-enhanced logistics IoT architecture, using smart contracts to achieve data access control, ciphertext-policy attribute-based encryption to achieve privacy, and hash function to achieve data integrity detection. To find more efficient delivery routes, we design a logistics routing selection algorithm based on objective optimization. This algorithm considers time efficiency, transportation cost, workload, and other factors and uses objective optimization to optimize the path. More importantly, we devise a bidirectional choice strategy to achieve more humane services, not only for customers but also for express delivery sites. Finally, we analyze the security and performance of the scheme. The results show that the proposed scheme in this article has data privacy protection and efficiency, while considering the humanized factor of bidirectional option.