A distributed ledger is a digital record-keeping system that is shared across multiple locations or participants. Unlike traditional ledgers, which are maintained by a single entity, a distributed ledger allows all authorized users to access and update the information simultaneously. This enhances transparency and security, as changes are visible to all participants and require consensus before being finalized. One of the most well-known applications of distributed ledger technology is blockchain, which underpins cryptocurrencies like Bitcoin. In a blockchain, data is organized into blocks that are linked together in a chronological chain, making it difficult to alter past records. This structure helps ensure the integrity and reliability of the information stored within the ledger.