A clear introduction to distributed ledger technology, how blocks are linked together, and why blockchain is used in cryptocurrency.
Not every blockchain is open to the public. Access rules decide who can view data and who can add new records.
Built “for the people, by the people”. Anyone with an internet connection can join as a node, read the ledger and submit transactions. No single company is in charge.
Unlike public chains, one organisation is in charge. It controls who can read and write, and decides which members get access to the data.
A semi-decentralised network managed by more than one organisation. A chosen group of members shares control instead of a single owner.
Combines both worlds. Data blocks are created and hashed on a private network, then proofs are stored on a public chain, keeping records verifiable without exposing private data.
A public blockchain lets anyone join, read the ledger and submit transactions. No central company controls membership. This is the model used by major cryptocurrencies.
A private blockchain is run by one organisation. Only invited members can see the data, and writing is usually limited to the owner or approved operators. This suits internal systems that need shared records with tighter control.
A consortium blockchain is governed by a selected group of organisations. Members agree on who can read and write. It is common when several companies need a shared record without making everything public.
A hybrid blockchain mixes both models. Some information can be open, while write permission stays with invited members. This helps when transparency is useful but full open writing is not.
Our services are built around a private-chain approach: access is limited to invited members, and writing stays under controlled ownership. That supports clearer oversight, stronger permission control and a more suitable setup for guided consulting workflows.
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Blockchain is a type of distributed ledger. Instead of one organisation keeping a private database, many participants can hold a copy of the same transaction history.
New information is grouped into blocks. Each block is linked to the previous one, which is why the structure is described as a chain.
Cryptocurrencies such as Bitcoin use blockchain to record transfers. The same idea is also used in other applications, including supply tracking, digital records and smart contracts.
You do not need to be a developer to understand the main building blocks of this technology.
Copies of the record can be held across many computers, rather than in a single central database.
Each block contains data and a unique fingerprint that helps connect it to the previous block in the chain.
Participants follow agreed rules to decide which transactions are valid before they become part of the shared history.
A simple blockchain process can be understood in three steps.
A user sends a transaction from a wallet. The request includes the destination and the amount being transferred.
Computers on the network check whether the transaction follows the network's rules before it is accepted.
Valid transactions are grouped into a block. Once confirmed, that block is linked to the existing chain of records.
Blockchain is often discussed because it can help groups share records without relying on one central operator.
Understanding the technology includes understanding what it does not automatically solve.
Public blockchains can expose transaction details. Visibility is not the same as personal privacy.
Once a transfer is confirmed, reversing it may be difficult or impossible. Wrong addresses can mean permanent loss.
Networks can face congestion, software issues, or design weaknesses that affect users and applications.
Blockchain is a tool. It is not always the best database for every business or personal use case.
Next, explore wallets, stablecoins, security risks and how to think more carefully before using digital assets.
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