Blockchain Fintech Primers

What Is Blockchain Technology?


What Is A Blockchain?

Blockchain is a decentralized transparent technology innovation, distributed ledger that has the storage capacity for all the records of digital assets. Any data stored on blockchain is cannot be modified, making the technology a legitimate disruptor for fields like payments, cybersecurity and healthcare. Let’s limelight further on its technological aspects and usage.

What Is Blockchain Technology?

Blockchain, sometimes referred to as distributed ledger technology (DLT), makes the history of any digital asset unalterable and transparent through the use of a decentralized network and cryptographic hashing.A simple example for how does a blockchain technology work can be understood if we analyse Google Docs working methodology. When one creates a Google Doc and share it with a group of people, the document is simply distributed without copy or transfer. This creates a transparent and decentralized distribution chain that gives many users access to the original document at the same time without nay constraints. All modifications to the respective document is recorded in real-time which makes the change process all the more transparent. However unlike Google Docs, the original data on the blockchain cannot be modified once written, enhancing to its level of security.

Blockchain Evolution

The first concept of blockchain dates back to 1991 introduced by Stuart Haber and Wakefield Scott Stornetta with the idea of a cryptographically secured chain of records known as blocks. Two decades later this technology bloomed and gained importance like a bee on a sugar cube. The year 2008 marked a pivotal point for blockchain, as Satoshi Nakamoto gave the technology an established model and planned application. The first blockchain and cryptocurrency was launched in the year 2009 thereby enhancing blockchain’s impact across the tech arena.

Why Is Blockchain Important?

Blockchain is a revolutionary technology which helped to reduce security risks and stamp out fraud and bring transparency in a scalable way. Popularized by its association with cryptocurrency and NFTs, blockchain technology has since evolved to become a whole management problem solver for all spheres of global platform. Today, one can find this technology transparent for innumerable fields such as the food supply chain, securing healthcare data, innovating gaming and overall changing how we handle data and ownership on a massive scale.

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 How Does Blockchain Work?

For proof-of-work blockchains, this technology consists of three important concepts: blocks, nodes and miners.

What Is a Block?

Every chain consists of multiple blocks and each block has three basic elements:

  • The data in the block.
  • The nonce — “number used only once.” A nonce in blockchain is a whole number that’s randomly generated when a block is created, which then generates a block header hash.
  • The hash — a hash in blockchain is a number permanently attached to the nonce. For Bitcoin hashes, these values must start with a huge number of zeroes (i.e., be extremely small).
  • When the first block of a chain is created, a nonce generates the cryptographic hash. The data in the block is considered signed and forever tied to the nonce and hash unless it is mined.

 Types Of Blockchain Networks

  • Public Blockchain Networks

A public blockchain is one that anybody can join and partake in, like Bitcoin. Downsides could incorporate significant computational power required, practically no protection for exchanges, and frail security. These are significant contemplation for big business use instances of blockchain.

  • Private Blockchain Networks

A private blockchain network, like a public blockchain network, is a decentralized shared network. Notwithstanding, one association oversees the organization, controlling who is permitted to take part, execute an agreement convention and keep up with the common record.

  • Permissioned Blockchain Networks

Organizations who set up a private blockchain will commonly set up a permissioned blockchain network. It is essential to take note of that public blockchain organizations can likewise be permissioned. This puts limitations on who is permitted to take part in the organization and in what exchanges. Members need to acquire a greeting or authorization to join.

  • Consortium Blockchains

Multiple organizations can share the obligations of maintaining a blockchain. These pre-chosen associations figure out who might submit exchanges or access the information. A consortium blockchain is great for business when all members should be permissioned and have a common obligation regarding the blockchain.

Advantages And Disadvantages Of Blockchain

Like all forms of technology, blockchain has several advantages and disadvantages to consider.


One significant benefit of blockchains is the degree of safety it can give, and this likewise implies that blockchains can shield and get sensitive information from online transactions. As a matter of fact, it just requires a couple of moments, though other exchange techniques can require a few days to finish. There is additionally no outsider obstruction from monetary establishments or government associations, which numerous clients take a gander at as a benefit.


Blockchain and cryptography includes the utilization of public and private keys, and there have been issues with private keys. In the event that a client loses their confidential key, they face various difficulties, making this one disadvantage of blockchains. One more detriment is the versatility limitations, as the quantity of exchanges per hub is restricted. Along these lines, it can require a few hours to complete various exchanges and different undertakings. It can likewise be hard to change or add data after it is recorded, which is one more critical inconvenience of blockchain.

What Are the Implications Of Blockchain Technology?  

Blockchain technology has made a great impact on society, including:

  • Bitcoin, Blockchain’s prime application and the purpose for which the innovation was done in any case, has helped many individuals through monetary administrations like advanced wallets. It has given microloans and permitted micropayments to individuals in under ideal financial conditions, in this manner presenting new life on the world economy.

  • The following significant impact is in the idea of Trust, particularly in the sphere of international transactions. Previously, legal counselors were recruited to bridge the trust gap between two parties, yet it consumed additional time and cash. In any case, the presentation of Cryptocurrency has drastically changed the trust equation. Numerous associations are situated in regions where resources are scarce, and corruption is widespread. In such cases, Blockchain renders a critical benefit to these impacted individuals and associations, permitting them to get away from the stunts of questionable outsider delegates.

  • The new face of the Internet of Things (IoT) is now overflowing with savvy gadgets that — turn on your clothes washers; drive your vehicles; navigate your ships; organize trash pick-up; oversee traffic wellbeing locally and so on! This is where blockchain comes in. In these cases (from there, the sky is the limit), utilizing blockchain innovation by making Smart Contracts will empower any association to both further develop activities and keep more precise records.

  • Blockchain technology enables 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.

  • 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.

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