With the rise of cryptocurrencies like Bitcoin, the term "blockchain" has become a popular topic of discussion. However, a related concept—Distributed Ledger Technology (DLT)—has not received the same level of attention.
When both "blockchain" and "distributed ledger technology" appear together, it's natural to wonder: are these concepts the same?
Many people use the two terms interchangeably, but this is actually a common misconception. Some companies have tried to rebrand themselves using the hype around cryptocurrencies, leading to "blockchain" becoming associated with fraud in some contexts. Meanwhile, "distributed ledger technology" has gained acceptance among financial institutions and government bodies without the same level of publicity.
What Is Distributed Ledger Technology?
A distributed ledger is a database that exists across multiple nodes or computing devices. Each node in the distributed network replicates and stores an identical copy of the ledger.
A groundbreaking feature of DLT is that the ledger isn’t managed by a central authority. Instead, management and updates are handled independently by each node. Updates usually require nodes to vote and reach an agreement, ensuring most copies remain consistent.
This voting process is known as achieving consensus. It is automated through consensus algorithms—once agreement is reached, each node updates its ledger automatically.
DLT reduces the cost of trust. It minimizes reliance on intermediaries like banks, governments, law firms, notary offices, and regulatory bodies.
What Is Blockchain?
Blockchain is a form of distributed ledger technology. It’s important to note, however, that not all DLT uses blockchain to achieve secure and efficient distributed consensus.
Blockchain relies on a peer-to-peer network for node management, using the collective computing power and bandwidth of the network rather than centralized servers. Like all DLT, blockchain doesn’t require a central server for authorization or management.
The key difference is that data on a blockchain is grouped into blocks. These blocks are linked using cryptographic hashing, creating a chain of records.
At its core, a blockchain is a shared database structured as an append-only ledger. This means it’s nearly impossible to alter or delete data in previous blocks. As a result, blockchain is well-suited for recording events, managing records, tracking assets, and facilitating voting.
How Do Blockchain and DLT Differ?
Blockchain is one implementation of distributed ledger technology. In other words, it is a subset of DLT. Simply put, every blockchain is a DLT, but not every DLT is a blockchain.
DLT does not necessarily structure data into blocks. Data may be stored in a distributed manner across nodes without using a chain of blocks.
Additionally, DLT generally does not require proof-of-work—a consensus mechanism common in many blockchains. Proof-of-work is a way to confirm that a certain amount of computational effort has been expended. By certifying the result rather than monitoring the process, it enables efficient consensus in decentralized environments—similar to real-world diplomas or driver’s licenses.
In theory, DLT can offer better scalability—a design metric that refers to a system’s ability to handle growing amounts of work. High scalability means the system can maintain high performance, throughput, and low latency even as demand increases.
👉 Explore more about consensus mechanisms
Benefits of Distributed Ledger Technology (Including Blockchain)
DLT returns control of data to the nodes, enhancing transparency. It can significantly reduce transaction times and operate around the clock. It also improves back-office operational efficiency and automation, helping organizations save substantially on operating costs.
For businesses, blockchain-based DLT offers a secure, tamper-resistant method for maintaining logs. It reduces operational inefficiencies and greatly lowers the potential for errors or fraud.
Frequently Asked Questions
What is the main difference between blockchain and DLT?
Blockchain is a type of DLT that uses a chain of blocks and cryptographic hashing. DLT is a broader category that includes any distributed database, with or without a chain structure.
Can DLT work without blockchain?
Yes. Distributed ledger technology can be implemented without using a blockchain structure. Alternative DLT systems may use different data organization methods and consensus algorithms.
Why is blockchain more widely known than DLT?
Blockchain gained popularity through its association with Bitcoin and other cryptocurrencies. DLT is a more general term often used in institutional and enterprise settings without the same public exposure.
Is proof-of-work required in all DLT systems?
No. Proof-of-work is specific to certain blockchains like Bitcoin. Many DLT systems use other consensus mechanisms such as proof-of-stake or Byzantine fault tolerance.
Which is more scalable: blockchain or other forms of DLT?
Other forms of DLT can be more scalable since they don’t always require the same resource-intensive consensus mechanisms. However, scalability depends heavily on design and implementation.
How do businesses benefit from using DLT?
Businesses benefit from increased transparency, reduced transaction times, lower operational costs, and enhanced security against fraud and data tampering.