What Is Blockchain Technology ?

Blockchain is an incredibly brilliant innovation – the brainchild of an individual or group of people, known by the pseudonym Satoshi Nakamoto. However, it has now developed into something larger and the first question most people start with is: what is blockchain?

What is Blockchain ? 

In the simplest of terminology, a blockchain is a time-stamped collection of permanent digital records that are maintained by a network of computers not operated by any particular individual. Each of these data blocks (i. e. block) is encrypted using cryptographic rules (i. e. chain) and bound to each other. So, what’s so great about it, and why do we say it has capabilities that threaten the way established things work?

There is no supreme body in the blockchain network making it the very meaning of a democratised framework. Because it is a public and eternal database, the information found in it is open to us to see. Therefore, whatever is built on the blockchain is open by its very existence and those concerned are accountable for their behaviour.

What is Blockchain

How Does Blockchain Work ? 

Once a block contains new data the blockchain is added. Like the name suggests, Blockchain is made of several blocks strung together. Nevertheless, four conditions must happen in order to connect a block to the blockchain: 

  • A transaction must take place. Let’s start with your Amazon impulse buy example. While hurriedly scrolling through several reminders for checkout, you go against your best judgement and make an order. 
  • That transaction needs to be checked. Your account needs to be checked after you make the order. For many online database documents, such as the Securities exchange commission, wikipedia, or the local library, there’s someone in charge of checking new report entries. Yet with blockchain, the task is left to a computer network. These networks also consist of thousands (or around 5 million, in the case of bitcoin) of machines distributed all over the globe. When you order from Amazon, the computer network rushes to verify if your purchase happened in the way you said it did. That is, they confirm the payment information including the date, amount and participants of the transaction. (more on how this works in a second). 
  • The transaction will be stored in a chain. After checking the request is correct it gets the green light. The amount of the purchase, your digital signature, and a digital signature from amazon are all placed in a file. There, the trade is expected to follow hundreds, or thousands, of others. 
  • There must be a hash to the block. Not unlike an angel receiving his wings, after all the transactions of a block have been checked, a special, distinguishing code called a hash must be given. The block is also given the hash applied to the blockchain from the most recent version. The block can be added to the blockchain when it’s hashed. 

When the blockchain is attached to the new node, it is freely open to everyone to view -even you. If you look at the blockchain of bitcoin, you can find that you have access to transaction records, along with details about when (“time”), where (“height”), and who (“relayed by”) applied the block to the blockchain.

Blockchain Features

The following characteristics help the groundbreaking blockchain technology stand out:


Blockchains are in essence egalitarian, ensuring that no one individual or community has the ultimate network authority. Although everybody in the network has a copy of the distributed ledger with them, no one on their own can change it. This unique blockchain feature allows the users to have transparency and protection while giving them control.

Peer-to-peer network 

Through the usage of blockchain, the connection between two parties using a peer-to-peer platform is conveniently accomplished without any third party’s requirement. Blockchain uses the P2P protocol that allows all members of the network to keep an equal copy of transactions, requiring acceptance via a consensus system. For starters, if you want to make some transaction from one part of the world to another, you can do it in just a few seconds with blockchain all by yourself. In fact, any interruptions or additional costs in the transfer will not be deducted.


A blockchain’s immutability attribute refers to the fact that no modifications can be made to the data once placed on the ledger. Consider sending an email as an example, in order to understand immutability. When you send an email to a group of people you can’t take it back. To find a way through, you’ll need to ask all the recipients to erase your email. That is how the feature of immutability works.


With the immutability property found in blockchains, manipulation with some data is easier to spot. Blockchains are known to be tamper-proof because any shift can be identified and handled smoothly in only one node. There are two main ways to detect falsification, namely blocks and hashes.


What are the major issues with blockchain technology ? 

Blockchain technology in some ways is very successful and in other ways, it is completely terrible. The three key concerns regarding blockchain technology include its scalability, transparency and economic viability.

Is Blockchain Scalable ?

A lot of participants need to hold up-to-date copies for a blockchain to function. Which means thousands of nodes must carry the same database. That is very inefficient. 

If we want to look at how technology has developed in the last 15 years, blockchain goes against the rationale of cloud computing. Cloud computing moves towards a centralized network, accessed by several nodes. Such nodes do not have to keep a private copy of this database themselves. 

Furthermore, nodes that carry blockchain copies get regular updates. Those nodes are spread worldwide. Because of this, blockchains are particularly latentious (latency is the amount of time it takes to transfer data across the network). As a result, the blockchain platform faces problems of scaling. Bitcoin can handle roughly 4-5 transactions a second. At about 25 transactions per second, Ethereum maxes out. Visa will handle transactions in excess of 24,000 per second.

Is Blockchain Anonymous ?

Bitcoin, Blockchain infrastructure – like other emerging innovations – was popularly associated with illegal activity in the early days. And it was very difficult in those early days to connect a bitcoin wallet to a particular person, even though there was proof that the wallet was being used in illegal activities. 

One factor that has made it  become more popular as a store of value and financial instrument is that it is no longer as anonymous as it was in those early days. Many of the big platforms that enable you to purchase and sell bitcoin follow “know your consumer” (KYC) principles and law enforcement authorities have also become increasingly expert at connecting bitcoin purchases with particular persons. Many ventures have arisen in an attempt to leverage blockchain technologies to secure privacy to users (e. g. monero and zcash), but they are considerably less mainstream.

Is Blockchain Economical ?

The median transaction rate at the Bitcoin network stood at $34 per transaction in December 2017. Companies such as stripe and valve have announced they will no longer allow bitcoin payments because of excessive fees. 

Today the bitcoin network’s median transaction size is around $300, while the median transaction fee bounces about $0. 10, that’s a 0. 03% median transaction cost, far higher than its peak’s 0. 7% charge. While the costs have gone down, bitcoin is still difficult to trade on a regular basis as the network will have to address problems such as scaling, transaction blocking time and more before it’s ready for the major leagues.

Popular Applications of Blockchain Technology

Though the first common blockchain technologies are bitcoins and cryptocurrencies, they are not the only ones. The essence of blockchain technology has driven businesses, industries and developers from around the world to discover the value of the technology and make innovative improvements in different sectors.

Smart contracts

Digital contracts perform similar things to paper-based contracts. The differentiating aspect of smart contracts is that in essence, they are both interactive and self-executable. Self-executable ensures they are implemented automatically when those requirements are fulfilled in the code of such contracts. Ethereum, an open-source blockchain network has introduced the blockchain community to smart contracts. Smart contracts may be used for multiple scenarios or sectors, such as banking arrangements, health care, immovable property records, crowdfunding, etc.

Identity management

The need of the hour is to provide a web-based system that manages a person identity. The distributed ledger technology used in blockchains provides you with advanced public-private encryption methods that allow you to prove your identity and digitize your documents. When performing any financial transactions or other online activities in a global community, this special safe identity will serve as a saviour for you.

Government Elections

No matter how secure government elections are made, the chances of bribery by antisocial elements still remain. The existing voting method is based on confidence and manual preparation. The risks of human mistakes cannot be overlooked even if data vulnerabilities and frauds are excluded. The best approach in these situations is to simplify the entire process with the help of smart contracts. Blockchain smart contracts have a modern network that can quickly remove these specific issues. Entries into the smart contracts would allow for transparency and protection while protecting voters’ privacy, thereby allowing for equal elections.

Intellectual property rights

With the aid of the internet, digital material or information can be quickly copied and distributed. Despite that, people from all over the world have the ability to clone, duplicate and use the material without providing attribution to the original content creator. There are copyright laws to cover these things but such laws are not well established according to specific global norms in the current scenario. IP ledger blockchain can help authors, creators, or consumers get copyright clarity. If they report their research online, they will be in possession of the proof which will be tamperproof. Since blockchain is essentially permanent, any entry once stored on the blockchain cannot be changed or modified.

Advantages and Disadvantages of Blockchain

Advantages and Disadvantages of Blockchain 

Despite its complexity, the ability of blockchain as a decentralized method of record-keeping is almost unlimited. From improved consumer protection and enhanced security to reduced transaction costs and fewer failures, blockchain technology has benefits outside the above-mentioned applications. 


  • increased precision by removing human interference 
  • Cost reduction in verification by eliminating third-party
  • decentralization makes it difficult  to exploit 
  • transactions are safe, private and effective 
  • transparent technology


  • high infrastructure costs associated with bitcoin mining 
  • small transactions per second 
  • history of usage for illegal activities
  • Not so difficult to hack

Blockchain vs. Bitcoin

The purpose of blockchain is to enable the storage and dissemination of digital content, but not for editing. That idea can be hard to fully comprehend without seeing the system in practice, so let’s look at the early implementation of blockchain technology. Stuart Haber and W. Scott Stornetta, two researchers who decided to develop a program that couldn’t tamper with record timestamps first introduced the blockchain concept in 1991. But it wasn’t until almost two decades later that blockchain saw its first real-world implementation, with bitcoin launched in January 2009. 

Bitcoin expands on the blockchain protocol. In a research paper describing Bitcoin, Satoshi Nakamoto, the pseudonymous founder of  the digital currency, referred to it as “a modern, truly peer-to-peer, online cash system, with no trustworthy third party. “

The future of blockchain technology 

In the end, blockchain is just as much a political and economic theory as it is a scientific one. Blockchain technology provides a modern way of thinking about how we come to grips with issues. Multiple untrusted parties may for the first time establish and settle on a common point of fact, without the need of a middleman. Therefore, the ramifications of the platform for conventional middlemen and business players are theoretically massive. When the world grows, blockchain’s potential is expected to take on almost unknown shapes.


Blockchain is a new name in the tech world but it’s certainly one that will endure. From the early days, beginning from its very first use of cryptocurrency, the concept has achieved tremendous prominence. Each day more fields of use of this technology are being found and evaluated. When the technology is embraced and widely recognised, it will change the way we work today.

Fascinating Blockchain Statistics

  • 90% of European and North American banks were investigating blockchain in 2018 
  • The global blockchain development industry is expected to generate $20 billion in sales by 2024 
  • Blockchain will eliminate 30% of the capital costs of banks 
  • Finance firms will save up to $12 billion a year by using blockchain 
  • More than 90% of people engaged in cryptocurrency are men
  • FBI owns 1. 5% of the world’s overall biomedicine
  • 55 percent of applications for health care will have implemented blockchain for commercial implementation by 2025 
  • The financial sector invested a total of $552 million on blockchain in 2018


E-wallets allow Cryptocurrencies to be stored by individuals. Users will control their balance of two cryptocurrencies in the case of Blockchain Wallet: Bitcoin and Ether. Every time a user submits a request, a unique address is created. Additionally, users can send bitcoin or ether when someone sends them a unique address.

Users may visit https:/www. blockchain. com/explorer to look up a bitcoin transaction and use the search bar on the upper right to learn more about a specific bitcoin address, transaction hash, or block number by entering it in the search field. 

Yes, blockchain is intrinsically safe. Far more secure are private keys because they are considerably longer. This is how blockchain offers the individual user a higher level of security, as it eliminates the need for weak and easily compromised passwords and online identities.

Although the specifics vary between Blockchain protocols, the essence of the technology is that it’s a physical, decentralized transaction ledger. These transactions are verified in whatever way the particular Blockchain application deems appropriate.

Distributed ledgers use independent computers (called nodes) to register, exchange and synchronize all transactions in their separate electronic ledgers rather than having the data  centralized as obtainable in the traditional ledger.

Bitcoin is a crypto-currency used to reduce transaction costs and the processing time of transactions across borders. The blockchain is a distributed ledger which allows for peer-to-peer transaction in one of the safest environments.

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