How does blockchain work?

Blockchain technology has been around for over a decade now, but many people still struggle to understand how it works. In this article, we will explain the basics of blockchain technology and how it works.

What is Blockchain Technology?

Blockchain technology is a decentralized digital ledger that records transactions in a secure and transparent manner. It was first introduced in 2008 as a core component of the cryptocurrency, Bitcoin. Since then, blockchain technology has been adopted by various industries beyond cryptocurrency, including finance, healthcare, and supply chain management, to name a few.

How Does Blockchain Work?

At its core, blockchain technology is a distributed ledger that is maintained by a network of computers. When a transaction is made, it is verified by a network of computers, and once it is verified, it is added to a block of transactions. Once a block is complete, it is added to the blockchain.

Each block in the blockchain contains a unique code called a “hash” that is created using complex mathematical algorithms. The hash is like a digital fingerprint that ensures the integrity of the block. Once a block is added to the blockchain, it cannot be altered or deleted.

The Role of Miners

Miners play a crucial role in the blockchain network. Their job is to verify transactions and add them to the blockchain. Miners are incentivized to do this work with rewards in the form of cryptocurrency tokens.

When a transaction is made, it is broadcast to the network of computers that are part of the blockchain network. The miners then compete to solve a complex mathematical puzzle to verify the transaction. The first miner to solve the puzzle gets to add the transaction to the blockchain and receives a reward for their efforts.

The competition between miners to solve the puzzle is what makes the blockchain network secure. It is virtually impossible for a malicious actor to alter the blockchain because they would need to control a majority of the network’s computing power to do so.

Smart Contracts

One of the key innovations of blockchain technology is the ability to create smart contracts. Smart contracts are self-executing contracts with the terms of the agreement between buyer and seller being directly written into lines of code. The code and the agreements contained therein exist on a decentralized blockchain network.

Smart contracts enable transparent and secure execution of agreements between parties without the need for intermediaries such as lawyers. This can save time, money, and reduce the risk of fraud or error.


Blockchain technology is a revolutionary technology that has the potential to transform many industries. Its decentralized and secure nature provides a level of transparency and trust that was not possible before. By understanding the basics of how blockchain technology works, we can begin to see the immense potential it has for the future.

If you’re interested in learning more about blockchain technology, there are many resources available online that can help you dive deeper into this fascinating technology.


Note: This article is for informational purposes only and is not intended as investment or financial advice.

By imedia

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