The technology utilized for creating digital currencies is blockchain. Blockchain is a distributed ledger technology that securely records transactions across multiple computers in a way that the registered data cannot be altered retroactively. This enhances transparency and trust, as every participant in the network can access the same information. Digital currencies, such as Bitcoin and other cryptocurrencies, leverage blockchain for secure monetary transactions, decentralized control, and innovative features like smart contracts, opening new avenues for finance and economic interactions.