The type of technology used to create cryptocurrencies is primarily blockchain technology. Blockchain serves as a decentralized, distributed ledger that records all transactions made with a cryptocurrency, ensuring transparency and security. Each transaction is grouped into a block and linked to the previous block, creating a chain of records that is immutable upon verification by network participants. This eliminates the need for central authorities or intermediaries, empowering users to conduct peer-to-peer transactions with confidence. Additionally, blockchain technology enables the implementation of smart contracts, enhancing the functionality and possibilities within the cryptocurrency ecosystem.