This paper explores the integration of blockchain technology into modern information systems, with a focus on architectural principles, decentralized data structures, and security frameworks. It examines the transformative potential of blockchain in areas such as financial transactions, digital identity, and data integrity. The article also addresses key technical challenges, including scalability, consensus mechanisms, and regulatory compatibility, offering a forward-looking view on how distributed ledger technologies can reshape the landscape of digital infrastructures.

blockchain, distributed systems, cryptographic protocols, decentralization, information security, smart contracts, consensus algorithms, digital identity.

Mougayar, W. The Business Blockchain: Promise, Practice, and the Application of the Next Internet Technology. Hoboken: Wiley, 2016. 208 p.

Tapscott, D., Tapscott, A. Blockchain Revolution: How the Technology Behind Bitcoin and Other Cryptocurrencies Is Changing the World. London: Penguin, 2016. 368 p.

Swan, M. Blockchain: Blueprint for a New Economy. Sebastopol: O’Reilly Media, 2015. 152 p.

Crosby, M., Pattanayak, P., Verma, S., Kalyanaraman, V. Blockchain technology: Beyond Bitcoin // Applied Innovation Review. 2016. Vol. 2. P. 6–10.

Zheng, Z., Xie, S., Dai, H., Chen, X., Wang, H. An overview of blockchain technology: Architecture, consensus, and future trends // Proceedings of the 2017 IEEE International Congress on Big Data. 2017. P. 557–564.

Christidis, K., Devetsikiotis, M. Blockchains and smart contracts for the Internet of Things // IEEE Access. 2016. Vol. 4. P. 2292–2303.

Zyskind, G., Nathan, O., Pentland, A. Decentralizing privacy: Using blockchain to protect personal data // 2015 IEEE Security and Privacy Workshops (SPW). 2015. P. 180–184