Blockchain-Based Secure Data Sharing for Smart Cities: Challenges, Solutions, and Future Directions

Blockchain technology plays a pivotal role in enabling secure, transparent, and decentralized data sharing in smart city environments. This paper explores the challenges associated with data privacy, interoperability, and scalability in smart cities and investigates blockchain-based solutions that leverage features such as immutability, smart contracts, and decentralized consensus to address these issues. Furthermore, it highlights future research directions to enhance blockchain integration for efficient and trustworthy data exchange among diverse urban stakeholders, ensuring the resilience and sustainability of smart city ecosystems.