What is Blockchain and How does it Work?

There are many misconceptions about what blockchain technology actually is and how it’s used. In this guide, we’ll explore the basics of blockchain technology and show you some of the most exciting potential uses of the technology across different industries. We’ll also explain why blockchain technology has been so revolutionary and why it will continue to grow in use over time. Read on to learn more about what is blockchain and how does it work?

What is blockchain?

A blockchain is a modern form of technology that used blocks to perform an action or transaction. The blockchain database isn’t stored in any single location, meaning the records it keeps are truly public and easily verifiable. No centralized version of this information exists for a hacker to corrupt.

Hosted by millions of computers simultaneously, its data is accessible to anyone on Earth with an internet connection. A blockchain database isn’t stored in any single location, meaning no-one can go in and delete a bunch of records just because they don’t like those records.

Bitcoin’s public ledger (blockchain) – doesn’t have a single point of failure. If you destroy it in one place, there are millions of copies to restore from. The beauty of that level of distributed security is that no single party has control over any part of its history. No one can alter or delete records without doing irreparable damage to any iteration going back to its inception.

Distributed networks are inherently more secure than centralized ones. That’s why blockchain technology was created in 2009 by an anonymous person calling themselves Satoshi Nakamoto – because they saw what it would take for people to realize that their centralized institutions were not as safe as they believed them to be.

Today we live amidst staggering amounts of valuable data; but what if tomorrow all of it could be transferred peer-to-peer through encrypted addresses around the world, instantly accessible by anyone with a smartphone? What if bank accounts weren’t controlled by giant corporations, but directly linked through code built into open source smart contracts on transparent blockchains where nobody could cheat like in our current financial system?

What if identities were stored across global networks that everyone had access to? What if true democracy was possible without ever trusting a central entity or repository of information to confirm your voice was counted among those who mattered most. It sounds impossible, right?

Not really. We just need enough people pushing for change in order to realize what future generations will take for granted as obvious aspects of their reality. In order to get there though, there are serious hurdles that must be overcome by any project seeking to bring about widespread adoption of blockchain technology.

How does Blockchain work?

Blockchain technology is a secure, shared database of records that’s used to track transactions between two parties. Each transaction or block in a chain is encrypted to ensure its authenticity, creating a permanent ledger of activity that can be instantly validated by users on either side.

In many ways, blockchain acts as an incorruptible digital ledger of monetary transactions. Imagine it like an Excel spreadsheet where every cell in that spreadsheet has both a timestamp and can be edited by multiple users at once without fear of overwriting each other’s data – that’s blockchain.

The blockchain database consists of an ordered, back-linked list of blocks or transactions. Each block contains a timestamp and a link to a previous block. The blockchain itself can be thought of as an append-only ledger, where new records cannot be erased or updated retroactively without alteration of all subsequent blocks.

This allows market participants to keep track of digital currency transactions without central recordkeeping, trusting instead that each party’s transaction history will remain publicly available indefinitely.

Also Read: Artificial Intelligence And The Future Of Cyber Security

Use cases for blockchain

Throughout history, humans have turned to paper (and parchment) as a convenient way to record agreements, transactions, and laws. In recent years, we’ve added digital ledgers to improve on paper-based systems — think of a mortgage loan or an equities trade.

Although these digital transactions were more secure than their paper counterparts, they still carried two major drawbacks: firstly, they were centralized (which made them vulnerable to cyberattacks); secondly, all of these transactions depended on intermediaries for trust — for example when you deposit money in your bank account.

Blockchain aims to solve both of these problems by providing a decentralized ledger that records transactions in a transparent manner that’s verifiable but not easily tampered with.

Although blockchain was originally designed for cryptocurrency transactions, there are a number of other potential uses for blockchain. Many companies have been turning to blockchain in order to provide secure and transparent ways of recording transactions.

For example, Walmart has created a digital supply chain tracking system using IBM’s version of blockchain, while Nestle and Unilever are currently trialling similar systems that track their products as they move from farm to table. A logistics company called Maersk (which deals with around 10 million shipping containers globally) has also begun testing a supply chain tracking system using blockchain.

What is the Importance of Blockchain?

This database, which was originally conceptualized by an anonymous group or individual known as Satoshi Nakamoto in 2008, forms what’s known as a distributed ledger. It allows two parties who don’t know each other to make an exchange of data or value without having to go through a third party like a bank.

Once information is verified by all users of that blockchain, that information becomes embedded in blocks of digital code (hence blockchain) that are distributed across its peer-to-peer network. Every time another block is added to the chain, more secure versions of those transactions get created for everybody on that network. The records can be added anonymously and removed only by consensus.

Blockchain has come into common usage, but not many people actually understand what it is. It’s been called the backbone of a new type of internet, but unlike any other existing network or technology. It provides access to information that was previously open only to financial institutions, government agencies, large companies and wealthy individuals.

By making all kinds of data easily accessible through an easy-to-use platform (without compromising its security), blockchain has made several industries run more efficiently. That efficiency comes from reducing or eliminating intermediaries—middlemen such as banks and other third parties—that are currently required to make transactions secure, transparent, convenient and trustworthy for everyone involved.

Blockchain in cryptocurrency

Almost every discussion about blockchain technology includes a reference to cryptocurrency like Bitcoin. Most cryptocurrency enthusiasts will tell you that you can’t understand blockchain without first understanding cryptocurrency. That’s because they’re intimately related.

At its core, Bitcoin was designed to be a peer-to-peer digital cash system that removes some of the need for trusted third parties like banks or payment processors. Transactions are verified by network nodes and recorded in a public distributed ledger called a blockchain.

So that’s blockchain. While there’s a lot of hype surrounding cryptocurrency, blockchain has much broader applications. While cryptocurrencies have only been around for a few years, companies have already begun exploring other uses for blockchain technology. In fact, you probably don’t interact with blockchain on a daily basis, but you probably will in the future.

What is the Future of Blockchain?

Blockchain was invented in 2008 to record bitcoin transactions, but its potential uses stretch far beyond cryptocurrencies. That’s because blockchain isn’t just a way to track money; it’s a fully encrypted and decentralized digital ledger that can be used to record just about anything—from births and deaths to marriages, property exchanges, contracts, copyrights, wills, medical procedures, scientific discoveries, votes or even daily weather reports.

While some people consider blockchain an overhyped buzzword used by marketing professionals with no real-world application (and others see it as our financial system’s saving grace), regardless of your take on blockchain technology one thing’s for sure: it’s too big of an opportunity for businesses to ignore.

With that said, it’s clear blockchain technology isn’t perfect. Its transaction times are slow, at roughly 10 minutes per transaction (or more), and a limited number of transactions can be processed per second. When contrasted with traditional payment processing systems—like Visa, which can process 24,000 transactions per second—that seems pretty limiting.

In fact, until blockchain technology improves in those areas, many banks are reluctant to use blockchains for large-scale projects because of their scalability concerns. But there are other ways to use blockchain for business without worrying about scalability or even speed issues; businesses just need to understand how to best leverage their strengths in ways that make sense for their specific industries.

Also Read: Why It’s Important to Pay Attention to Cyber Security

How does Blockchain changing the Technology?

If there’s one thing most people know about blockchain, it’s that cryptocurrency is related to it. But how many people truly understand blockchain? Even worse, do you understand why they should care if they don’t even own bitcoin or ethereum? We’re here to help—let us break down everything you need to know about blockchain in plain English, so that you can use your newfound knowledge at your next dinner party (and brag just a little bit).

That’s one of blockchain’s most exciting qualities: thanks to its decentralized nature, blockchain makes it possible for people to transact directly with each other. This means that buyers and sellers can complete a transaction without going through a middleman like Amazon or PayPal.

And because blockchain records every transaction in an online ledger, each party has access to their respective record of what happened—and can verify whether or not someone did what they said they would.

For example, when someone sends bitcoin (or another cryptocurrency) to a friend, everyone on that network knows about it because there’s an unchangeable record of all those transactions stored in computer servers around the world.

Why should I learn Blockchain?

To cut through all of these benefits and applications, let’s take a look at what blockchain really is. At its core, blockchain can be thought of as an online ledger that chronologically records transactions. That’s in contrast to what we traditionally think of as ledgers—those bound books where we record our financial transactions.

Instead of having a physical copy that exists in one place, though, every computer on a blockchain has a copy of every transaction ever made. So if I buy 1 bitcoin from you today, everyone on that blockchain knows about it.

What are some popular uses of blockchain: In addition to cryptocurrencies, there are many other possible applications for blockchain technology. For example, you could use a blockchain ledger to make secure digital voting systems that ensure nobody can tamper with votes once they’re counted.

This technology could also be used to create tamper-proof digital records of property ownership or inventory tracking in supply chains. As blockchains become more widely used and recognized, we’ll likely see more innovative uses for them emerge.

At its core, blockchain can be thought of as an online ledger that chronologically records transactions. That’s in contrast to what we traditionally think of as ledgers—those bound books where we record our financial transactions.


This post should give you a high-level overview of what blockchain technology is. It discusses some of its uses and applications in an effort to help entrepreneurs determine if they should be using it for their business. It also provides links for further reading on each topic as well as instructions on how to begin researching your own use cases.

As with any new technology, there’s a lot to learn about blockchain, but by familiarizing yourself with some basics now, you can begin exploring its possibilities in your own company.

The technology could prove beneficial to businesses in a number of ways—from improving supply chain management to increasing customer data privacy—and by getting started now, you can start identifying possible applications before others beat you to them.

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