Blockchain ABCs
Blockchain is discussed almost entirely through cryptocurrency. That is a small part of it. Here is a plain account of what a distributed ledger is, and the narrower set of problems where it genuinely beats an ordinary database.
In the wake of any industrial revolution, there is a fundamental change in how we live, work, and relate to one another. The same can be said of the digital revolution, which is being driven by emerging technologies such as blockchain. Although blockchain is often associated with cryptocurrencies, its applications are much broader and have the potential to reshape many industries.
What is Blockchain?
Blockchain technology offers a new form of savings: use, maintenance and access of records. Simply put, it is a distributed database that is operated on a peer-to-peer network. Because the network has no centralised authority, transactions and records can be verified and added without the involvement of any intermediary or institution. The platform on which a record is stored as a block is added to a chain of previous records — hence the name blockchain.
Cryptocurrencies
Cryptocurrencies are a key example of how blockchain is used in practice. Cryptocurrencies such as Bitcoin and Ethereum are digital currencies built on top of blockchain protocols. By using cryptography to secure transactions and verify the transfer of assets, cryptocurrencies remove the need for a central authority such as a bank or government.
Benefits of Blockchain
Immutability: A blockchain record, once added, cannot be altered without re-doing all subsequent records — by design, history is hard to rewrite.
Decentralisation: There is no single point of failure or control, so the system is resilient.
Transparency: All participants share the same view of the ledger, which builds trust between parties that may not otherwise know one another.
How Financial-Sector Businesses Can Use Blockchain
The new wave of blockchain technology has the potential for various commercial applications. Some of the use cases include digital identity, the digitisation of value-bearing certificates, supply-chain traceability, smart contracts that automate routine clauses, and cross-border payments that settle in minutes rather than days.
It is up to leadership in banking and other financial-services companies to take blockchain as a real possibility and not a curiosity. The companies that move from observation to implementation now will benefit from cost and trust advantages later.
When or When Not To Use a Blockchain?
Blockchains are not always the right tool. Generally, consider blockchain when you have multiple, untrusted parties writing to a shared dataset, when an audit trail matters, or when you need decentralisation as a property of the system rather than as a slogan. If a traditional database serves the same need at lower cost, use the database.
