Demystified: What is Blockchain? How Does Blockchain Work?

Understand the meaning and working of blockchain technology with real-life examples. Blockchain is expected to be the futuristic solution for many industries.
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Blockchain is believed to be a huge movement in the world’s currency and transaction activity. Bubbling with immense potential, blockchain technology is one meant for the future. As per a survey conducted by a consultancy firm PWC back in 2018, India might just lead in blockchain adoption by 2023. Along with rapidly changing digital payments and earnings, it will also deal with some rather prevalent security issues. Let’s understand this better: What is blockchain and how does it work? 

What is Blockchain?

As the name suggests, blockchain is a series of blocks that help in processing transactions and storing digital data. Often referred to as ‘distributed ledger’, data on a blockchain is made accessible to few people and everyone involved has a copy of the same. Every single transaction that has taken place in the ledger will be recorded by each user of the blockchain. Hence, every user has to update their transaction details to stay in sync. 

To be more certain, a block consists of digital information that is saved in a chain which is the public database. 

For example, Steem is a blockchain-based social media platform that rewards its members in Steem dollars or Steem that they can use for transactions. If you are a blogger, you can upload regular blogs on the platform. How do you earn money? 

Depending on the number of upvotes you get on your article, you will be awarded Steem dollars in your Steem wallet. This wallet is updated by blockchain technology and there is no scope of making any changes or manipulating your transaction details on it. The wallet is a publicly viewable but can be accessed only by you through a private key. 

Yes, this is also an example of cryptocurrency. 

Read More: 9 Facts About Cryptocurrency You Must Know

How does Blockchain work?

Imagine a blockchain as a personal diary entry you would make of your expenses. Now, imagine it at a much larger scale with multiple parties involved in your transactions. Every time there is new data, a block with data is added onto the string of blocks. Hence, it is called a blockchain. What qualifies for a block to enter the chain? 

Once the transaction has occurred, it should pass verification when the blockchain traces the exact details of your transaction. For example, a Steem dollar transaction made by a Steem user will be verified based on the time of the transaction, the amount spent and the participants that were involved in the transaction. 

Once the details have matched, the transaction will be stored in a block with your digital signature. It will join the chain of the many transactions that have happened in the past or are happening simultaneously. 

The last step is to give the block a hash. A hash is a unique code that defines your block and also adds it as the most recent block on the chain. 

There you go! You can now view your transaction in full detail and so can the rest of the world but with limited access. 

Also Read: How Blockchain Will Be Crucial For The Supply Chain Industry And Its Ecosystem

Is Blockchain secure?

Even a social media platform like SteemIt uses the concept of public and private keys which restricts the public’s accessibility to a user’s information. 

Blockchain is a secure network for mainly two reasons: 

First: When new blocks are created, they are stored in a chronological manner. The newest blocks will always be at the end of the chain making it difficult to change to the subsequent blocks. As mentioned above, each block has a unique hash to it. 

To make any changes in the information, the hash would also require to be changed. How does this ensure security? If one hash is changed, all blocks would need to have their hash changes which would be a lot of computational effort. 

Second: Another effort taken by the blockchain industry in terms of trusting is computer tests i.e ‘consensus models’. Every computer has to probe that the work has been done by them through a complex mathematical problem. Only when the computer is able to solve this equation, it is possible for it to add a block. 

Also Read: Understanding The Blooming Relationship Between Blockchain And Insurance

What problems does it solve?

To not have any information altered and be presented to you in its authentic state is a possibility with blockchain. This would be especially beneficial for business firms since customers can have a record of all the products that have been bought and in what state. The problem of ‘bad product’ being manipulated in records vanishes! 

Another industry blockchain that makes it easier is healthcare. The mundane and long process of filling out health forms by patients every time they visit is only doubling the work. With blockchain, it becomes simpler to access past records and find information. This reduces the wait time for patients and there is no double work. 

Artists also can benefit heavily from blockchain technology to prove they own a piece of content. With so many channels growing and providing a stage for artists, piracy and copyright issues are on a rise. Intellectual property can be protected with blockchain technology creates a record of this and is enough to prove who owns the piece. 


Most industrialists think of blockchain as more than just a transaction-based technology. They think of it as a way of life. For it to catch on with banks and financial institutions, it would take a while. The adoption of this technology and understanding its functioning is already in process. The next step would be the execution of this technology successfully and waiting to realize if it is actually as effective as it is perceived to be. 

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Comments (17)
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  • Jake Ryan

    Brilliant Post I must say, Radhika Udas!
    .Thank you so much for an informative explanation and perspective. I was rigorously going through some BlockChain related articles when this article was so much helpful for me and easy to understand because of the real-life examples on BlockChain.
    Thank You, so much for the post keep on adding such insightful articles .Cheers!

  • tita

    Really useful. I really enjoyed reading this post. thanks

  • David Miller

    Very well written. I appreciate your knowledge and writing style. In addition to these points, blockchain technologies are even used in space research & development. Blockchain technologies have brought a revolution to this modern tech world.

  • Reba Johnson

    Really a nice article, covered the exact working methodology of blockchain!

  • Dean Bryan

    Thanks for sharing such a piece, Expecting more of these. I always i had a concern about this. Now I have a better idea

  • Immanuel Kant

    Hey.. Great Post!!! am not saying that i fully understood about Blockchain but i got bit of it. Thanks for sharing such nice piece. Expecting more of these.

  • immanuelkant

    Such nice post and this post explains a lot. I always had a concern about Blockchain. this post gave me some idea about than. Expecting more of these. Thanks for sharing

  • Zaarahary

    Blockchain technology and its working has clearly explained in this article. Thanks for sharing!

  • Henrydavid

    Wow. Very informative. Thanks for sharing such nice post. Am expecting about cryptocurrency development.

  • Urdu Novels

    I came across this board and I find It really useful & it helped me out a lot. I hope to give something back and aid others like you aided me.

  • Alice Jenifferze

    Good written article! learned about blockchain, Thanks!

  • Bessiejoans

    The article you have shared about Blockchain is very informative and helpful.

  • Thomas Hobbes

    Thanks for sharing such nice article. This post explain a lot. Expecting more of these.

  • moshbhavika

    Blockchain is the promising technology as well as it’s revamping many businesses. Thanks for the this guide which will helpful to the beginners!

  • Ravi

    Thanks for sharing such a wonderful piece of information.