Block Chain Technology

Blockchain technology is a structure that stores transactional records, also known as the block, of the public in several databases, known as the “chain,” in a network connected through peer-to-peer nodes.

Digital Ledger

Typically, this storage is referred to as a ‘digital ledger’. Every transaction in this ledger is authorized by the digital signature of the owner, which authenticates the transaction and safeguards it from tampering. Hence, the information the digital ledger contains is highly secure.
In simpler words, the digital ledger is like a Google spreadsheet shared among numerous computers in a network, in which, the transactional records are stored based on actual purchases. The fascinating angle is that anybody can see the data, but they can’t corrupt it.
Blockchain is an emerging technology with many advantages in an increasingly digital world:

Highly Secure

This method uses a digital signature feature to conduct fraud-free transactions making it impossible to corrupt or change the data of an individual by the other users without a specific digital signature.

Decentralized System

Conventionally, you need the approval of regulatory authorities like a government or bank for transactions; however, with Blockchain, transactions are done with the mutual consensus of users resulting in smoother, safer, and faster transactions.

Automation Capability

This method is programmable and can generate systematic actions, events, and payments automatically when the criteria of the trigger are met.

Why is Blockchain Popular?

Suppose you are transferring money to your family or friends from your bank account. You would log in to online banking and transfer the amount to the other person using their account number. When the transaction is done, your bank updates the transaction records. It seems simple enough, right? There is a potential issue which most of us neglect. These types of transactions can be tampered with very quickly. People who are familiar with this truth are often wary of using these types of transactions, hence the evolution of third-party payment applications in recent years. But this vulnerability is essentially why Blockchain technology was created. Record keeping of data and transactions are a crucial part of the business. Often, this information is handled in house or passed through a third party like brokers, bankers, or lawyers increasing time, cost, or both on the business. Fortunately, Blockchain avoids this long process and facilitates the faster movement of the transaction, thereby saving both time and money.

Cryptographic keys

A peer-to-peer network containing a shared ledger. A means of computing, to store the transactions and records of the network. Cryptography keys consist of two keys – Private key and Public key. These keys help in performing successful transactions between two parties. Each individual has these two keys, which they use to produce a secure digital identity reference. This secured identity is the most important aspect of Blockchain technology. In the world of cryptocurrency, this identity is referred to as ‘digital signature’ and is used for authorizing and controlling transaction. the digital signature is merged with the peer-to-peer network.

The process of Transaction

One of Blockchain technology’s cardinal features is the way it confirms and authorizes transactions. For example, if two individuals wish to perform a transaction with a private and public key, respectively, the first person party would attach the transaction information to the public key of the second party. This total information is gathered together into a block. The block contains a digital signature, a timestamp, and other important, relevant information. It should be noted that the block doesn’t include the identities of the individuals involved in the transaction.

Hash Encryptions

Blockchain technology uses hash encryption to secure the data, relying mainly on the SHA256 algorithm to secure the information. The address of the sender (public key), the receiver’s address, the transaction, and his/her private key details are transmitted via the SHA256 algorithm. The encrypted information, called hash encryption, is transmitted across the world and added to the Blockchain after verification. The SHA256 algorithm makes it almost impossible to hack the hash encryption, which in turn simplifies the sender and receiver’s authentication. 


In Blockchain technology, the process of adding transactional details to the present digital/public ledger is called ‘mining.’ Though the term is associated with Bitcoin, it is used to refer to other Blockchain technologies as well. Mining involves generating the hash of a block transaction, which is tough to forge, thereby ensuring the safety of the entire Blockchain without needing a central system

In a Blockchain, each block consists of 4 main headers.

1) Previous Hash: This hash address locates the previous block.
2) Transaction Details: Details of all the transactions that need to occur.
3)Nonce: An arbitrary number given in cryptography to differentiate the block’s hash address.
4) Hash Address of the Block: All of the above (i.e., preceding hash, transaction details, and nonce) are transmitted through a hashing algorithm. This gives an output containing a 256-bit, 64 character length value, which is called the unique ‘hash address.’ Consequently, it is referred to as the hash of the block.

At Politics

In the area of politics, Blockchain is being looked at by an organization called Follow My Vote, which is trying to combat election fraud at the ballot box.


Bitcoin, Blockchain’s prime application and the whole reason the technology was developed in the first place, has helped many people through financial services such as digital wallets. It has provided microloans and allowed micropayments to people in less than ideal economic circumstances, thereby introducing new life in the world economy.

Concept of TRUST

The next major impact is in the concept of TRUST, especially within the sphere of international transactions. Previously, lawyers were hired to bridge the trust gap between two different parties, but it consumed extra time and money. But the introduction of Cryptocurrency has radically changed the trust equation.

Blockchain Renders 

Many organizations are located in areas where resources are scarce, and corruption is widespread. In such cases, Blockchain renders a significant advantage to these affected people and organizations, allowing them to escape the tricks of unreliable third-party intermediaries.

Secure Platform

Blockchain technology can be used as a secure platform for the healthcare industry for the purposes of storing sensitive patient data. Health-related organizations can create a centralized database with the technology and share the information with only the appropriately authorized people.

Creates a Network

Blockchain technology can create a decentralized peer-to-peer network for organizations or apps like Airbnb and Uber. It allows people to pay for things like toll fees, parking, etc.

Internet Of Things

The advent of the Internet of Things (IoT) has unleashed a plethora of smart machines that transfer data over the Internet without any human interaction needed. Likewise, technology is even used for public services such as rubbish collection, transportation, and traffic management. So, in the world of IoT, you can make Smart Contracts and allow smart objects to perform the listed tasks.

“Data is a precious thing and will last longer than the systems themselves.”

Tim Berners-Lee

“Without big data analytics, companies are blind and deaf, wandering out onto the web like deer on a freeway.”

Geoffrey Moore

“You can have data without information, but you cannot have information without data.”


In the private consumer world, Blockchain technology can be employed by two parties who wish to conduct a private transaction.
Fortunately, since Blockchain technology employs a shared ledger, distributed ledger, or any other decentralized network, the parties can quickly gain answers to these exchange relation queries.
Also, transactions or information on a Blockchain platform can be tracked from departure to the destination point by all of the users in the supply chain.


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