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What is Blockchain Technology and How Does It Work?

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What is Blockchain Technology and How Does It Work?

In the past few years, you’ve probably frequently heard the word “blockchain technology,” most likely in relation to cryptocurrencies such as Bitcoin. In reality, you might be thinking, “What does blockchain mean?” It seems like blockchain technology is just a flimsy term in a conceptual sense because there is no actual definition that a layperson is able to grasp. It is essential to know “what is blockchain technology?” including the technology that it uses, how it functions, and the ways it’s growing in importance in the modern world.

As blockchain technology continues to expand and become more accessible to users, The onus is on you to master this ever-changing technology to prepare yourself for the future. If you’re unfamiliar with blockchain, then this is the best platform to build a solid foundational understanding. This article will help you learn how to answer, “What is blockchain technology?” You’ll also learn about the process of blockchain, as well as the reasons why it’s so important and how you can utilize blockchain technology to improve your career.

What is Blockchain Technology and How Does It Work?


What is Blockchain Technology?

What is Blockchain Technology?

A blockchain is a system that records transactions that are also referred to as “blocks” in public in various databases, referred to as the “chain,” in a network that is connected by peer-to-peer nodes. This type of storage is generally described as a “digital ledger.”

Every transaction recorded in this ledger is authenticated through its digital signature, which confirms the transaction and protects the ledger from being altered. Therefore, the data that the ledger’s digital version contains is very secure.

In simpler terms, it’s similar to a Google spreadsheet that is shared between many computers within a network in which transactional records are kept about actual purchases. The most interesting aspect is that anyone can access the information. However, they cannot alter it.

What is the reason for the popularity of Blockchain?

Imagine you’re transferring funds to family members or friends through your account at a bank. You’ll log into your online bank account and then transfer the money to another person using the account number. After the transaction is completed, your bank will update the transaction record. This seems straightforward. But there is a risk that is often overlooked by most of us.

These kinds of transactions could be altered very quickly. Anyone who is aware of this reality should generally beware of these kinds of transactions. This is the reason for developing third-party payment apps in the last few years. However, this is the primary reason why Blockchain technology was invented.

In terms of technology, Blockchain is a type of digital ledger that’s gaining a lot of interest and popularity in recent years. Why is it becoming so well-known? Let’s look into it to comprehend the entire idea.

The recording of data and transactions is an essential element of business. This data is usually managed in-house or transferred to an outside party, such as banks, brokers, or lawyers. This can result in a significant increase in time, expense, or both for the company. Luckily, Blockchain avoids this long procedure and allows for the faster transfer of transactions, thus saving time and money.

A majority of people think that Blockchain and bitcoin are interchangeable, but that’s not the case. Blockchain is a technology that can support diverse applications that are related to various industries, such as supply chain, finance, manufacturing, manufacturing, etc. But Bitcoin is a cryptocurrency that is based upon blockchain technology to ensure security.

Blockchain is a new technology that has many benefits in the increasingly digital world:


Highly Secure

It employs an electronic signature feature to ensure that there are no fraudulent transactions, making it difficult to alter or alter an individual’s data through others who are not using a digital signature.


Decentralized System

Conventionally, you must have approval from regulatory bodies such as the bank or government to conduct transactions. However, when you use Blockchain transactions, transactions are conducted through the collective agreement of the users, resulting in more secure, smoother, and more efficient transactions.  

How Does Blockchain Technology Work?

How Does Blockchain Technology Work?

  • In the last few years, you might have seen several businesses worldwide that have embraced Blockchain technology. What exactly is blockchain technology’s function? Are these significant changes or just minor enhancements? The technological advancements in Blockchain are in their early stages and are likely to revolutionize the world shortly. So let’s get started on deconstructing the technology.
  • A blockchain is a blend of three major technologies:
    1. Cryptographic keys
    2. A peer-to-peer network that includes an open ledger
    3. A method of computing used to store network data and transactions.
    4. Cryptography keys comprise two keys, namely, a public key and a private key. These keys aid in the execution of successful transactions between two parties. Every person is equipped with these two keys that they use to create a secure identity reference. Secured identity is the most crucial feature that is a part of Blockchain technology. Within the realm of crypto, this identity is described as a digital signature and is used to authorize and regulate transactions. Digital signatures are built into the peer-to-peer network; many people were acting as authorities use the digital signature to agree on transactions and other matters. If they sign off on a transaction, the transaction is confirmed with mathematical proof and ensures a secure transaction between two networked parties. In a nutshell, blockchain users employ cryptography keys to carry out various types of digital transactions over the network of peer-to-peer.

Different types of Blockchain

There are four distinct kinds of cryptocurrency. They can be described as follows:

Private Blockchain Networks

Private blockchains are based on closed networks and generally work for private companies and organizations. Businesses can utilize private blockchains to modify their access to authorization and access preferences and parameters that are applied to networks and other essential security options. Only one authority oversees the privately-owned Blockchain.

It is a public blockchain network.

It also played an important role in spreading the distributed ledger technique (DLT) by allowing access to Bitcoin and other cryptocurrencies derived from blockchains with public access. Public blockchains can also help solve certain issues and challenges that arise, like security flaws and centralization. The data stored on DLT is distributed through a peer-to-peer network instead of being kept in one central location. Consensus algorithms are utilized to confirm the authenticity of the information. Proof of stake (PoS) and proof of work (PoW) are two commonly used consensus techniques.

Permissioned Blockchain Networks (PBNs) are also referred to as hybrid blockchains.

Permissioned blockchain networks can be described as private ones that provide specific access for authorized individuals. Businesses typically establish such blockchains to make the most of both worlds. Additionally, they provide better organization in determining who can participate in the network and which transactions. Consortium BlockchainsLike 


permissioned blockchains, consortium blockchains include both private and public elements, except that several organizations can manage one consortium blockchain network. Although these kinds of blockchains are initially more difficult to establish, they will provide better security once they’re running. In addition, consortium blockchains are ideal for collaboration with several organizations.


Transaction One’s Process

Blockchain technology’s most important characteristic is how it validates and authorizes transactions. In the case of two people wanting to conduct an operation using two keys, public and private or both, the private key of the first party would join the transaction data with the other person’s public key. The complete information is then gathered into the form of a block. The block comprises an electronic signature, an exact timestamp, and additional important and pertinent details. It’s important to remember that the block doesn’t contain any information about the identity of the people who are involved in the transaction. The block is then distributed through all the network’s nodes. The operation is successfully completed once the correct person uses his private key to match it with this block. Apart from facilitating financial transactions, the Blockchain also holds transactions related to vehicles, property, etc. Here’s an example to illustrate the way Blockchain is used: hash encryption


Blockchain technology is used to create hashing and encryption to protect the data, using mainly the SHA256 algorithm to protect the data. The sender’s address (public key) and the address of the receiver, as well as the transaction details, and the private key information of the sender, are sent via the algorithm known as SHA256. The encrypted data, also known as the hash algorithm, is transmitted throughout the world and added to the Blockchain upon verification. Its SHA256 algorithm makes it nearly impossible to break the hash encryption, making it easier for the receiver and sender to authenticate. 


Evidence of the Work

In a blockchain, each block is comprised of four headers. Prior Hash Location: The address determines the block that was previously used.Transaction Details: Information about the transactions that have to be completed.Nonce: A random number used in cryptography to distinguish the block’s hash addresses.Hash Address of the Block: The above information (i.e., the preceding details about the transaction, hash, and nonce) are sent to the hashing algorithm. This produces an output that contains the 256-bit, 64-character length known as the unique hash address. It is also known as the “block’s hash.” Many people worldwide attempt to determine the correct hash value to meet a specified requirement using computer algorithms. Once the predetermined requirement is met, the transaction is complete. In simpler terms, blockchain miners attempt to solve a mathematical problem that is known as a “proof of work problem.” Anyone who solves it first is awarded the reward.



In Blockchain technology, the process of adding transactional data to the existing ledger of a digital or public key is known as “mining.” The word is usually associated with Bitcoin. It is also used to reference other blockchain technologies. Mining is the process of creating blocks with a hash that is difficult to create, which ensures the security of the whole Blockchain without the need for an underlying system.  


The History of Blockchain

Satoshi Nakamoto, the man whose true identity is still unknown now, first introduced the concept of blockchains in the year 2008. The technology evolved and improved over the years by utilizing Nakamoto using a method similar to Hashcash. It became a key part of Bitcoin, an extremely popular cryptocurrency, an official ledger of all transactions on the network. The size of the Bitcoin blockchain files that contained every transaction and record in the Blockchain increased significantly. By the end of August 2014, it was at 20 gigabytes and then reached 200 gigabytes in early 2020.

The Benefits and Drawbacks of Blockchain

Like every other type of technology, the Blockchain offers numerous advantages and drawbacks to be considered.

The Benefits and Drawbacks of Blockchain


One significant benefit of blockchains is the degree of security they offer. This also implies that blockchains can protect sensitive information through online transactions. If you’re looking for quick and easy payments, Blockchain technology provides this too. It is only a matter of minutes, whereas other methods may take a few days to be completed. It also does not have any third-party interference from banks or government organizations, which many users see as a benefit.


Cryptography and Blockchain require the use of private and public keys. According to reports, there have been issues regarding private keys. If the user loses their private keys, they are faced with a myriad of issues, which is one of the disadvantages of blockchains. Another issue is the limitations on scalability since the number of transactions per server is restricted. This means it could take a long time to complete multiple transactions and other tasks. It is also difficult to modify or add information after it has been recorded, which is a major disadvantage of Blockchain.

 It is programable and will produce a series of actions, events, and even payments regularly when the trigger requirements are met.


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