What is Distributed Ledger

A distributed ledger is a database that is consensually shared, replicated, and synchronised across multiple nodes computers spread across different locations, organisations, or even countries without any central administrator. Blockchain is the most well-known type of distributed ledger, but not all distributed ledgers are blockchains.

HOW DISTRIBUTED LEDGERS WORK

In a traditional database, a single server (or cluster controlled by one entity) holds the authoritative copy of data. Updates are centralised. In a distributed ledger, every participating node maintains its own copy of the complete dataset. When new data is added, it is propagated to all nodes, which validate and update their copies according to the consensus rules. No single node is the "master" all are peers.

DISTRIBUTED LEDGER VS. BLOCKCHAIN

Blockchain is a specific type of distributed ledger that organises data in chronological blocks linked by cryptographic hashes. All blockchains are distributed ledgers, but not all distributed ledgers use the block-and-chain structure.

Alternative DLT structures include:

Directed Acyclic Graph (DAG): Used by IOTA and Hedera Hashgraph transactions validate previous transactions rather than forming discrete blocks, enabling higher throughput.
Hashgraph: Hedera's patented consensus algorithm achieving high TPS with asynchronous Byzantine fault tolerance.
Holochain: Agent-centric DLT where each user maintains their own chain rather than a global shared ledger.

ENTERPRISE DLT APPLICATIONS

Many enterprises use permissioned distributed ledgers where participation requires authorisation:

Hyperledger Fabric (IBM): Enterprise blockchain framework used in trade finance (Marco Polo Network), food supply chains, and healthcare data sharing.
R3 Corda: Financial industry DLT used by over 300 banks and financial institutions for interbank settlements, trade finance, and digital bond issuance.
Quorum (ConsenSys/JPMorgan): Ethereum-based enterprise DLT with privacy features for financial institutions.

WHY DISTRIBUTED LEDGERS MATTER FOR FINANCE

Traditional financial settlement involves multiple intermediaries (correspondent banks, clearinghouses, custodians) each maintaining separate records that must be reconciled. DLT enables a single shared record across all participants, reducing settlement time from days to minutes and dramatically cutting reconciliation costs.

Terms in addition to the Distributed Ledger

Blockchain

A blockchain is a subset of a distributed database. The Bitcoin inventors originally prototyped the system in 2008. This modern database is made up of separate blocks that are connected together in a chronological chain. Blockchains may be used to store a wide range of data types. It has mostly been utilized as a public ledger for bitcoin transactions to date. A peer-to-peer network comprised of independent nodes uses a consensus process to ensure the blockchain's security and legitimacy. Each node in the network keeps a public and immutable copy of the data.

2 Factor Authentication (2FA)

2 Factor Authentication is a security measure with two layers. It is used by the majority of cryptocurrency exchanges. To log in, you must provide not only a password, but also a code obtained, for example, from the Google authenticator.

Airdrop

An airdrop is a method of distributing coins. End users can typically obtain coins for free or in exchange for doing a small task, such as subscribing to a newsletter, sending a tweet, or inviting others via a personal affiliate link. Cryptocurrency airdrops — the act of depositing cryptocurrency into public crypto wallets — are utilized as a marketing, liquidity creation, and network bootstrapping technique for many different types of blockchain initiatives.

Altcoin

Altcoin - "alternative coin" - is any kind of digital currency other than Bitcoin. Since the launch of Bitcoin, the world's first digital currency, many altcoins (as well as supporting blockchains) have been created. Altcoin digital currencies share many similarities to Bitcoin, but consistently and have significant differences. There are about 20,000 altcoins, and this number is expected to grow significantly in the coming years. Altcoins often develop Bitcoin features. Ethereum, currently the most widely used blockchain, supports digital contracts and separate applications where Bitcoin does not. Altcoins are also often created to cater to the needs of different users. The Litecoin blockchain, for example, can process payments quarterly for the duration of Bitcoin.

Cold Storage

Cold storage is the way to store cryptocurrency offline. The word refers to the use of offline wallets that are not connected to the internet. Cold storage is the most secure way to keep cryptocurrencies since an offline currency becomes less likely to be hacked and stolen. Paper wallets, printed renditions of private keys, and offline hardware and software wallets are all examples of cold storage.