The technology underpinning the foundation of cryptocurrency transactions is blockchain. This decentralized ledger technology enables secure and transparent transactions by recording all activities across a network of computers. Each transaction is grouped into blocks, which are then cryptographically linked, creating a chain of records. The use of consensus mechanisms ensures that all participants agree on the validity of transactions, providing trust without the need for a central authority. This innovation has disrupted traditional financial systems, allowing for peer-to-peer transactions.