Abstract

This collection explores how blockchain technology strengthens data privacy and security across smart cities, healthcare, and the Internet of Things. It highlights blockchain’s role in enabling privacy-preserving data sharing through cryptographic techniques like zero-knowledge proofs and homomorphic encryption. The papers cover securing sensitive records, managing consent, and ensuring data integrity and authenticity. While offering immutability and decentralization, research also addresses key challenges such as scalability, latency, and regulatory compliance. This body of work underscores blockchain’s potential as a robust solution for evolving digital privacy needs.