The term distributed ledger technology refers to a decentralized database system that securely records transactions across multiple locations, ensuring no single entity has control over the entire database. This technology underpins cryptocurrencies like Bitcoin, enabling transparency and accountability by providing a publicly verifiable record of transactions. Its attributes include immutability, where recorded data cannot be altered without consensus, and consensus mechanisms that validate transactions. Distributed ledger technology has potential applications beyond cryptocurrencies, including supply chain management and digital identity verification.