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what is blockchain & how does it works in 2022 | Dear Follow

If you work in banking or investment, you must be familiar with bitcoins, cryptocurrencies, and the idea of blockchain technology. Blockchain is a 21st-century invention that has gained enormous popularity.

Blockchain technology is being created to support bitcoins and other cryptocurrencies, and Bitcoin developers are working to integrate their technology into the arts and medicine.

Blockchain technology profited by becoming more significant even in real-life circumstances even after bitcoin’s reputation was destroyed due to its rapid demise.

what is blockchain ?

A blockchain is a mechanism for storing data that makes it difficult or impossible to change, hack, or deceive the system. A blockchain is simply a digital database of transactions duplicated and dispersed among the network of computers that make up the blockchain.

A blockchain is a type of database that organizes data so that users may easily access it. Blockchain applications enable recording sensitive data related to contracts, real estate, medical records, or any other business, even as bitcoins and other cryptocurrencies gain popularity.

Blockchain is so well-liked because it gives people a secure way to communicate with one another without engaging outside parties like banks or governments.

types of blockchain


A public blockchain is an open network that allows anybody to join without authorization. Due to its decentralized design and lack of central supervision, anyone in public can participate without obtaining permission. All links in the chain can produce and validate data thanks to the public blockchain.

Two well-known blockchain examples are bitcoin and ethereum. Since these cryptocurrencies are open source, anybody may access and utilize them. The public blockchain grows safer as it becomes more active. Gaining control of this blockchain is more challenging, if not impossible, the more robust the network.


A private blockchain is a permissioned network only open to selected participants, and it’s closed to the public and requires permission to join. Businesses may establish private blockchains for their purposes, allowing access only to approved people or machines.

Before gaining access, private blockchain participants must meet specific criteria, such as ownership of a minimum number of tokens and sharing a minimum amount of ID information. To change the data on the private blockchain, you must also have authorization from most network members.


Some businesses might be interested in keeping their blockchain private but still want to invite other companies to join. Blockchain consortiums are a way of doing that. Consortium blockchains are private blockchains that have been designed for a specific purpose: in this case, a group of organizations that all have an interest in working together and sharing data.

In addition, these organizations must also share common software standards for trading information. The goal of a consortium blockchain is to make sure as many participants as possible join the network, but not all can gain access to information on the web.

A consortium-based blockchain requires permission from most nodes on the grid before granting access to new members and their computers.


Bitcoin and ethereum are public blockchain examples, and they can operate as a closed, private blockchain when parties agree to specific rules. A hybrid blockchain is private by design yet retains the ability to be public on demand.

Hybrid blockchains make it more difficult for users to gain access because they must prove their identity before being allowed onto the network. This is possible only after the network participants verify their identity with a minimum number of other members of the consortium.

key features of blockchain

● Distributed Database

Blockchain is a database that consists of records of transactions owned by everyone on the same network. All its participants share it. Each participant acknowledges an identical and up-to-date copy of the blockchain, so there can never be conflicting versions of the truth.

● Immutability

Because no person or authority controls it, it’s impossible to change data on a blockchain once it’s been logged on the chain. It can only be added to with additional validated data, creating an immutable record that cannot be altered or erased in any way, hence “blockchain.”

● Transparency

Transparency is the key feature of blockchain technology. Users can view all the transactions, so you can always see what happened to your money or property. Blockchain databases usually don’t provide information on who did what.

In an ideal world, knowing who was responsible for each transaction would be possible because only valid transactions would be recorded on the blockchain. The same goes for other data types used in financial transactions and exchanges.

● Peer-to-peer Network

Blockchain is a peer-to-peer network that cannot be controlled by any authority or third party from outside, so it’s not accessible by third parties like banks or governments. You should use blockchain to safely and anonymously send money or to represent any other kind of property.

how does blockchain works ?

As we know, a blockchain is made up of blocks containing data. A team of researchers devised it to protect digital documents against editing or tampering in 1991.

Anyone may access a distributed asset called a blockchain, and data cannot be changed after it has been recorded on a blockchain. As a result, information is only captured when the most significant number of participants consent.

Three elements are required for the blockchain to operate: data, hash, and last block hash.

Step 1:data

epending on the blockchain, several data types are kept in a block. The blockchain stores details about transactions, including sender, recipient, and transaction amount, if the data is related to Bitcoin.

Step 2: Hash

The block also contains a hash that resembles a fingerprint. A block’s hash is calculated at creation time. The soup will change if anything within the block changes. Hashing helps in identifying changes in a blockchain because of this. If a block’s fingerprint changes, the block is no longer the same.

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Step 3: Previous Data Hash

The last component of a blockchain is a hash of a previous block. The latest block’s hash aids the formation of a chain, and as a result of these features, the blockchain is very safe to trust and utilize.

Each block in a blockchain is connected to the data in the preceding hash, but if any of the blocks’ contents are changed, the hash changes instantly, and the next block notices it and implements the changes immediately. Today’s computers can store millions of hashes every second.

The hash of tampered blocks and the hashes of other unions are automatically changed to restore the blockchain’s validity. This is made possible with the aid of the previously mentioned evidence of labour.


In a nutshell, blockchain is a type of database that uses the principle of cryptography to store information. Each block in the blockchain contains a hash of the previous block’s soup and a timestamp.

Bocks are connected into chains vertically, where new partnerships are linked to old ones through hashes. Encryption methods and resistance to tampering secure the entire chain. Blockchain is any data record stored on a decentralized ledger or chain.

In this light, it can be thought of as a digital ledger or database that is shared across multiple sites or networks so that it cannot be manipulated or corrupted by any entity (whether it be malicious hackers or an external authority such as a government).

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