A blockchain is a distributed database that is shared among computer network nodes. A blockchain, like a database, saves information electronically in digital format. Blockchains are well known for their critical function in cryptocurrency systems. Such as Bitcoin in keeping a secure and decentralized record of transactions.

The blockchain’s innovation is that it ensures the accuracy and security of data. Its record and produces trust without the requirement for a trusted third party.

The way data is structured differs significantly between a traditional database and a blockchain. A blockchain accumulates information in groups known as blocks, which hold sets of data. When the storage capacity of a block is reached, it is closed and linked to the prior filled block. It is producing a data chain known as the blockchain.

All new information that follows that newly added block is compiled into a newly formed block. It is then added to the chain once it is complete.

A database typically organizes its data into tables, whereas a blockchain, as the name suggests, organizes its data into pieces (blocks) that are strung together. When implemented decentralized, this data structure creates an irreversible temporal line of data. The block is completed, it is set in stone and becomes a part of this timeline. When a block is added to the chain, it is given a specific timestamp.

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How Does a Blockchain Work?

Blockchain’s purpose is to enable digital information to be recorded and distributed, but not modified. A blockchain, in this sense, serves as the foundation for immutable ledgers, or records of transactions that cannot be changed, erased, or destroyed. As a result, blockchains are often referred to as distributed ledger technology (DLT).

The blockchain concept was first suggested as a research project in 19911. It predated its first popular use in use: Bitcoin, in 2009. Since then, the use of blockchains has grown exponentially, thanks to the development of multiple cryptocurrencies, decentralized finance (Defi) applications, non-fungible tokens (NFTs), and smart contracts.

business, cryptocurrency and future technology concept – close up of hand with virtual bitcoin symbol hologram transparent smartphone screen over black background

How Are Blockchains Used?

Blocks on Bitcoin’s blockchain, as we now know, store data about monetary transactions. There are already over 10,000 additional cryptocurrency systems running on the blockchain. However, it has been shown that blockchain is also a reliable method of recording data about other types of transactions.

Walmart, Pfizer, AIG, Siemens, Unilever, and a slew of other corporations have already adopted blockchain technology. For example, IBM has developed the Food Trust blockchain to track the path that food goods follow to reach their destinations.

Why are you doing this? There have been numerous outbreaks of E. coli, salmonella, and listeria in the food sector. As well as hazardous compounds being mistakenly put into foods. It used to take weeks to figure out where these outbreaks were coming from or what was causing people to get sick from what they were consuming. Using blockchain, marketers can follow a food product’s journey from its origin to each stop along the way, and finally to its delivery. If food is proven to be tainted, it can be traced back through each stop to its source. Not only that, but these companies can now see everything else with which they have come into contact, allowing the problem to be identified far sooner and perhaps saving lives. This is one example of blockchain in action, however, there are many different ways to apply blockchain.

Satoshi Nakamoto is the creator of Bitcoin and the one to implement blockchain technology successfully. No one knows the identity of Nakamoto.

How is it going to change the world?

  • Accuracy of the Chain-A network of thousands of computers approves transactions on the blockchain network. This eliminates practically all human involvement in the verification process, resulting in reduced human error and a more accurate record of data. Even if a computer on the network committed a computational error, it would only affect one copy of the blockchain. For that error to spread to the remainder of the blockchain. It would have to be produced by at least 51 percent of the network’s computers. It is nearly impossible for a vast and developing network like Bitcoin’s.
  • Cost Reductions– Customers typically pay a bank to authenticate a transaction, a notary to sign a document, or a priest to perform a marriage ceremony. Blockchain eliminates the need for third-party verification, as well as the costs connected with it. Business owners, for example, pay a tiny fee whenever they accept credit card payments because banks and payment-processing businesses must handle the transactions. Bitcoin, on the other hand, lacks a centralized authority and offers low transaction fees.
  • Decentralization- Blockchain does not keep any of its data in a centralized location. Rather, the blockchain is replicated and distributed across a network of computers. Every computer in the network updates its blockchain whenever a new block is added to the blockchain. Blockchain becomes more difficult to manipulate with by disseminating that information over a network rather than holding it in a single central database. If a hacker obtained a copy of the blockchain, only a single copy of the information, rather than the entire network, would be compromised.


Q 1. What is the principle on which blockchain technology is based on?

It enables the information to be distributed among the users without being copied.

Q 2. Why is Blockchain a trusted approach?

  • Blockchain can be trusted due to so many reasons.
  • Its compatibility with other business applications due to its open-source nature.
  • Its security. As it was meant for online transactions, the developers have paid special attention to keeping up the pace when it comes to its security.
  • It really doesn’t matter what type of business one owns, Blockchain can easily be considered.

Q 3. What are the properties of Blockchain?

There are four key features of blockchain:

  • Decentralized Systems
  • Distributed ledger
  • Safer & Secure Ecosystem
  • Minting

Q 4. Name some popular platforms for developing blockchain applications

After the development of bitcoin, various blockchain platforms started coming up. Ethereum came right after the evolution of Bitcoins, and is one of the popular public platforms for building Blockchain based applications.

Then there is a Hyperledger community for building enterprise-based solutions. Also, Qtum, IOTA, EOS are some of the widely used platforms for building Blockchain.

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