Blockchain has emerged as a transformative technology offering transparency, decentralization, and security across digital transactions. Its applications extend far beyond cryptocurrencies into fields such as supply chain, finance, and data integrity. Blockchain Technologies and Applications explores the underlying principles, architectures, and consensus mechanisms of blockchain systems. The book discusses smart contracts, decentralized applications (DApps), and tokenization frameworks. It also addresses privacy, scalability, and regulatory challenges. By linking technical detail with real-world case studies, it provides readers with a balanced understanding of how blockchain is reshaping digital trust and innovation across industries.