Distributed Ledger Technology (DLT) is a way to store and update records across multiple computers, called nodes, rather than relying on a single central database. Each participant holds a copy of the ledger, and updates are shared and synchronized across the network, creating a common source of truth.
How DLT works
In a DLT system, new data, such as a transaction, is proposed to the network and then validated according to predefined rules. Many DLTs use a consensus mechanism to ensure nodes agree on which updates are legitimate, even if some nodes are offline or untrustworthy. Once consensus is reached, the ledger is updated on each node, making the record difficult to alter retroactively because changes would need to be reflected across many replicas. Depending on the design, a DLT can be public and open to anyone or permissioned, where only approved participants can read, write, or validate updates.
DLT vs. blockchain
Blockchain is a type of DLT, but not all DLTs are blockchains. In a blockchain, records are grouped into blocks and linked together in sequence, forming a chain that helps provide an auditable history. Other DLT designs may organize data differently, for example using alternative data structures or validation models, while still maintaining shared, synchronized records across a network.
Real-world context in crypto
Cryptocurrencies use DLT to track ownership and transfers of digital assets without a central operator like a bank. For example, when someone sends funds on a blockchain network, the ledger update is propagated and verified by many nodes, helping prevent double-spending and enabling independent auditing.
DLT matters because it underpins decentralized finance and digital asset networks, enabling shared trust, transparency, and resilience in systems where participants do not need to rely on a single intermediary.