Why do we need Blockchain? | Blockchain versions|Blockchain Variants|Use Cases of Blockchain|Bitcoin cryptocurrency|

Why do we need Blockchain?

Here, are some causes why Blockchain technology has become so popular.


Blockchains are often replicated architecture. The chain remains operated by most nodes within the event of an enormous attack against the system.

Time reduction:

Within the business industry, blockchain can play a key role by allowing the qualifying settlement of trades because it doesn’t need a lengthy process of verification, settlement, and clearance because one version of agreed-upon data of the shared ledger is out there between all stack holders.


Blockchain certifies and verifies the identities of the intended parties. This abolishes double records, reducing rates, and accelerates transactions.

Unchangeable transactions:

By enrolling agreements in sequential order, Blockchain validates the unalterability, of all actions which suggest when any new block has been added to the chain of ledgers, it cannot be removed or modified.

Fraud prevention:

The concepts of shared information and consensus prevent possible losses because of fraud or embezzlement. In logistics-based industries, blockchain as a monitoring appliance act to reduce costs.


Attacking a typical database is that the bringing down of a specific target. With the help of Distributed Ledger Technology, each party holds a reproduction of the primary chain, therefore the system remains operative, even the huge number of other nodes fall.


Changes to communal blockchains are publicly viewable to everyone. This offers greater transparency, and each one transaction is immutable.

Collaboration :

Allows parties to transact directly with each other without the need for mediating third parties.


There are standards principles on how every node exchanges the blockchain information. This method ensures that every one transaction is validated, and each one valid transaction is added one by one.

Blockchain versions

Blockchain 1.0: Currency

The execution of DLT (distributed ledger technology) led to its first and obvious application: cryptocurrencies. this permits financial transactions supported blockchain technology. it’s utilized in currency and payments. Bitcoin is the most prominent example of this segment.

Blockchain 2.0: Smart Contracts:

The new key concepts are Smart Contracts, small computer programs that “live” within the blockchain. they’re free computer programs that execute automatically and check conditions defined earlier like facilitation, verification or enforcement. it’s used as a replacement for traditional contracts.

Blockchain 3.0: DApps:

DApps is an abbreviation of decentralized applications. it’s its backend code running on a decentralized peer-to-peer network. A DApp can have frontend code and user interfaces written in any language which can make a call to its backend, like traditional Apps.

Blockchain Variants


In this kind of blockchains, ledgers are visible to everyone on the online. It allows everyone to verify and add a block of transactions to the blockchain. Public networks have incentives for people to hitch and liberal to be used. Anyone can use a public blockchain network.


The private blockchain is within one organization. It permits only specific people of the organization to verify and add transaction blocks. However, everyone on the online is typically allowed to seem at it.


In this Blockchain variant, only a gaggle of organizations can verify and add transactions. Here, the ledger is usually open or restricted to select groups. A consortium blockchain is used cross-organizations. it’s only controlled by pre-authorized nodes.

Blockchain Use Cases

Blockchain Technology is used widely within the various sectors as given within the subsequent table.

Sector                        Usage

Markets                * Billing, monitoring and Data Transfer
                       * Quota management within the availability Chain Network

Government Sector    
                      * Transnational personalized governance services
                      *Voting, propositions P2P bond,
                      *Digitization of documents/ contracts and proof of ownership for transfers
                      *Registry & Identify
                      *Tele-attorney service
                      *IP registration and exchange
                      *Tax receipts Notary service and document registry


                      *Agricultural & drone sensor networks
                      *Smart home networks
                      *Integrated Smartcity.
                      *Smart home sensors
                      *Self-driving car
                      *Personalized robots, robotic component
                      *Personalized drones
                      *Digital Assistants

                      *Data management
                      *Universal EMR Health databanks
                      *QS Data Commons
                      *Big health data stream analytes
                      *Digital health wallet Smart property
                      *Health Token
                      *Personal development contracts
Science & Art

                      *Crowd analysis
                      *P2P resources
                      *Digital mind fit services

Finance & Accounting

                       *Digital Currency Payment
                       *Payments & Remittance
                       *Decartelized Capital markets employing a network of the pc on the Blockchain
                       *Inter-divisional accounting
                       *Clearing & Trading & Derivatives

Important Real-Life Use Cases of Blockchain

1.Dubai: The Smart City

In the year 2016, the smart Dubai office introduced the Blockchain strategy. Using this technology entrepreneurs and developers are getting to be able to connect with investors and leading companies. the target is to implement a blockchain-based system that favors the event of various quite industries to make Dubai ‘the happiest city within the planet.

2. Incent Customer retention

Incent is CRaaS (Consumer retention as a service) supported Blockchain technology. it is a loyalty program that’s supported generating a token for business affiliated with its related network. during this technique, blockchain is exchanged instantaneously, and it’s often stored in digital portfolios of the user’s phone or accessing through the browser.

3. Blockchain for Humanitarian Aid

In January 2017 the United Nations world food program started a project called humanitarian aid. The project was developed in rural areas of the Sindh region of Pakistan. By using Blockchain technology, beneficiaries received money, food, and everybody kind of transactions is registered on a blockchain to form sure security and transparency of this process.

Bitcoin cryptocurrency: Most popular Application of Blockchain

What is Cryptocurrency?

It is one medium of exchange like usual currencies like USD, but it’s conceived to exchange digital data through a process made possible by certain rules of cryptography. A cryptocurrency could also be a digital currency and is assessed as a subset of other currencies and virtual currencies.

Cryptocurrency could also be a bearer instrument supported by digital cryptography. during this quite cryptocurrency, the holder has of the currency has ownership. No other record kept on the identity of the owner. within the year 1998, Wei Dai published “B-Money,” an anonymous, distributed electronic cash system.

What is Bitcoin?

Bitcoin was started in 2009 by an unknown person called Satoshi Nakamoto. Bitcoin could also be a Peer-to-Peer technology that may not be governed by any central authority or banks. Currently, issuing Bitcoins and managing transactions are administered collectively within the network. it’s presently the dominant cryptocurrency of the earth. it’s open-source and designed for the general public means nobody owns the control of the Bitcoin. In fact, there are only 21 million Bitcoins supplied. Currently, Bitcoin features a market cap of $12 billion.

Everyone can use bitcoin without paying any process fees. If you’re handling Bitcoin, the sender and receiver transact directly without employing a 3rd party.

Blockchain and Bitcoin:

The blockchain is the technology behind Bitcoin. Bitcoin is that the digital token and blockchain is that the ledger that keeps track of who owns the digital tokens. you can’t have Bitcoin without blockchain, but you will have a blockchain without Bitcoin.

Other prominent cryptocurrencies

  • Ethereum
  • Bitcoin Cash
  • Ripple
  • Litecoin

Limitations of Blockchain technology

Higher costs:

Nodes seek higher rewards for completing Transactions during a business which work on the principle of Supply and Demand

Slower transactions:

Nodes prioritize agreements with higher rewards, backlogs of transactions build-up

Smaller ledger:

It is impossible to a full copy of the Blockchain, potentially which may affect immutability, consensus, etc.

Transaction costs, network speed:

The transaction cost of Bitcoin is sort of high after being touted as ‘nearly free’ for the primary few years.

Risk of error:

There’s always a risk of error, as long because the human factor is involved. just in case a blockchain is a database, all the incoming data has got to be of top quality. However, human involvement can quickly resolve the error.


Every node that runs the blockchain has got to maintain consensus across the blockchain. This affords very low downtime and makes data stored on the blockchain forever unchangeable. However, all this is often wasteful, because each node repeats a task to succeed in consensus.