The technology used to facilitate peer-to-peer transactions without intermediaries is known as blockchain. This decentralized digital ledger records transactions across multiple computers, ensuring that each record is immutable and transparent. By utilizing cryptographic techniques, blockchain allows parties to transact directly with one another while maintaining privacy and security. This technology underpins digital currencies like Bitcoin, but its applicability extends to various sectors, enabling secure contracts, supply chain management, and even voting systems, revolutionizing traditional transaction processes.