The technology that underpins most cryptocurrencies is called blockchain. This decentralized, distributed ledger technology allows for secure and transparent record-keeping of transactions without the need for a central authority. Each transaction is recorded in a block and linked to the previous one, forming a “chain” of blocks that is resistant to tampering. This ensures the integrity of the data and builds trust among users. Blockchain’s transparency and security have made it foundational for various applications beyond cryptocurrencies, including smart contracts and supply chain management.