Blockchain is a distributed ledger technology that enables secure and transparent storage of transactions. Each transaction is inserted into a block, which is sequentially linked to other blocks, forming a chain. (da qui il nome "blockchain"). Each block contains a cryptographic reference to the previous block, ensuring data integrity.
The blockchain is decentralized: it is managed by a network of nodes that verify and validate transactions through consensus algorithms, such as proof-of-work. This structure makes the blockchain resistant to tampering and ideal for applications that require security, such as cryptocurrencies, smart contracts, and supply chain traceability.