Blockchain

A blockchain is a decentralized and distributed ledger technology (DLT) that records transactions across a network of computers. Each block in the blockchain contains a group of transactions and a cryptographic hash of the previous block, creating a chain of blocks that are secure, immutable, and tamper-resistant. Blockchains are the backbone of cryptocurrencies like Bitcoin and Ethereum, but they are also used for other applications such as supply chain management, voting systems, and smart contracts. The decentralized nature of blockchain ensures that no single entity has control over the data, and transactions are validated by the network's consensus mechanism, making it a highly secure system. Blockchain technology has revolutionized industries by offering transparency, security, and trustless interactions without the need for intermediaries.