Blockchain — what it is and how it works

Blockchain is one of those technologies that rapidly evolved from an experiment into a real tool used by business, public administration and the financial sector. Although often associated with cryptocurrencies, its core idea is much broader and far more universal.

At the heart of blockchain lies a distributed ledger that does not belong to a single entity and does not require trust in a central institution. Security and credibility are ensured by the system's architecture and mathematical verification mechanisms.

Data is recorded in consecutive blocks linked into a single chain, and each new entry becomes a permanent part of the history that cannot be arbitrarily altered or removed.

Today this technology is used not only in finance, but also in logistics, public administration, data protection and voting systems.