What is blockchain technology? How does it work?

What is blockchain technology? How does it work?

January 28, 2021 0 By Nishat Firdaush

Blockchain, blockchain & blockchain everywhere you are listening about it. But in reality, you do not know What is blockchain technology? How does blockchain work?

How blockchain is going to be beneficial in the coming future? No worries, I have explained every small detail of blockchain technology.

In this article, we will discuss in detail the working system of blockchain technology. Along with the definition, meaning.

Blockchain technology is simple to understand. But becomes complex when terms are not understood well. And so people assume that it’s very risky to invest in this technology.

However, the fact that this technology is gaining popularity. And seeking greater opportunities in various fields.

Blockchain technology can be a takeover of digital space for the future. Like any current technology, the blockchain can promote advancement.

Regarding the development of a massive technological community. 

What is the meaning and definition of blockchain?


It is defined as; A shared, immutable ledger. That enables the function of registering transactions and tracing investments in a network.

An investment can be in cash, land, or formless like intellectual property, patents, copyrights.

Everything that is significant is traceable. And, exchanged on a blockchain network. This deducts the risk of hacking. Also, not involving a third party.

A blockchain is a digital record of transactions. The name appears from its arrangement, in which a person records, called blocks. It forms a single directory, called a chain. 

Each traded deal adds to a blockchain. It is authenticity is verified. By numerous computers on the Internet.

The system is connected to the monitor. To identify different blockchain transactions. This forms a peer-to-peer network.

They work together to secure each transaction. Therefore, it is credible. Now, before the system calculates the data to the blockchain.

This decentralized network of computers confirms a single system cannot add invalid blocks to the chain.

The specialty of blockchain is that; if you want to make changes to the information recorded in a particular block. You can’t just rectify the block. But the change records in a new block.

Displaying recent changes. Along with that particular date and time. Therefore, blockchain aids in a non-destructive way. That helps to track data changed over time

Meanwhile, the Blockchain system uses programming languages such as C++, Python, and JavaScript. 

Transactions that take place with cryptocurrencies, such as Bitcoin. Uses Blockchain technology for recording transactions.

What is blockchain technology?

It’s a  Distributed Ledger Technology (DLT), blockchain is a network that helps in recording information.

Likewise, the information is stored in a way. This makes it tough for anyone to hack or trick the system. The technology makes the system transparent and immutable.

The system is a digital ledger of transactions. Furthermore, it distributes to the universal network of computer systems. And servers on the blockchain.

Block in the chain includes data of transactions made. Moreover, new transaction data is notified to each participant’s ledger.

In this manner, the database is under the supervision of many participants. Most importantly, as a decentralized system. There is no central agency regulating the system.

The system operates an immutable cryptographic seal called a hash to register every transaction.

Therefore, helps in connecting every new block. Subsequently, through a chain created to the earlier block.

This makes it complicated to hack the system. As a result, if one block tampers, participants will realize that somebody is aiming to hack the system.  

As more and more people start using the number of blocks will also increase, making the entire system secure.

The system is more productive and has no transaction cost, the system is economical. 

What is blockchain technology? How does blockchain work?

How does blockchain technology work?

There are data in the block.

Every chain contains many blocks and each block has three basic sections.

A 32-bit whole number called a nonce. The nonce is randomly generated when a block is created, which then generates a block header hash.

The hash is a 256-bit number joined to the nonce. When the first block of a chain forms, a nonce creates the cryptographic hash. The data in the block follows a process of evaluation.


Miners assemble new blocks on the chain through a function called mining.

In a blockchain, every block has its distinctive nonce and hash. Also, the hash of the previous block.

During the formation of the chain is taken as reference. Mining a block is a difficult task.

Miners operate a particular software to solve the complicated math problem of getting at a nonce that induces hash.

One nonce is only 32 bits. The hash is 256 bits. There are more than a billion possibilities of nonce-hash combinations.

However, this needs to be mined until the exact one is found.

To fetch nonces it requires a tremendous amount of time and computing power.

A cryptographic puzzle is mandatory to be solved. By the series of many computers. Which has all the information related to blockchain.

The computer solves the puzzle. And shares the solution to all the other computers on the network.

This is known as proof of work. Verification by different computers makes sure that blockchain technology is reliable.

As a result, In this search quest of discovering of the nonce. Once a block is mined, the change is approved by all the nodes on the network. Moreover, the miner gets rewards.

This is the golden nonce. And, a block with data received. Later added to the chain. If at all there is a requirement to change any data in the blockchain.

As a result, The chain needs re-mining for every block. Certainly, which piles over time. Therefore, it’s extremely troublesome to alter changes in blockchain technology.


It is a distributed ledger via the nodes attached to the chain. Nodes maintain replicas of the data in the blockchain and protect the network from dysfunction.

The Entire node has a copy of the data stored in the blockchain. And the system must algorithmically approve. The newly mined blocks for the chain to be verified and updated.

Since blockchains are transparent, every movement in the ledger can be easy to examine and observed.

Each participant has a private key which is like a password of a unique alphanumeric identification number that shows owners’ transactions.

Blockchain is safe in relative different record keeping systems, As each new transaction is encrypted and linked to the previous transaction.

Blockchain uses a special complicated string of mathematical numbers which is impossible to change.

To sum up, this makes it immutable and incorruptible. Above all, That helps Blockchain to protect the data from misusing it.

Conclusion on What is blockchain technology? How does blockchain work?

Blockchain technology will make life easier and comfortable. In changing the ways of storing. Maintaining a record of transactions for goods and services.

Blockchain technology applies to many facets of life. Its Application is not just restricting to currency payment.

Moreover, contracts of financial markets agreements. But has reached a diverse sector. As the government, health, medical, publishing, economic development, and many more.

Consequently, Various organizations and businesses are using the technology to be in the frontline of their competitors. Now you can make a career in blockchain also. Its future is bright. I hope you got a clear answer on What is blockchain technology? How does blockchain work? Still, any confusion do let me know in the comment box.