The meaning of Blockchain

Blockchain is a decentralized, distributed ledger technology that records transactions across multiple computers in a way that makes them tamper-resistant and transparent. Each "block" in the chain contains a cryptographic hash of the previous block, a timestamp, and transaction data. Once recorded, the data in any given block cannot be altered without altering all subsequent blocks, which requires the consensus of the network majority. This makes blockchain secure against fraud and manipulation. It has applications beyond cryptocurrencies, including supply chain management, voting systems, and digital identity verification.