What is Blockchain? How does it work?


“A distributed database that maintains a continuously expanding list of ordered records, called blocks,” is what a blockchain is. These blocks are connected by cryptography. Each block includes transaction information, a timestamp, and a cryptographic hash of the one before it.

Blockchain, sometimes called distributed ledger technology (DLT), makes the history of digital assets immutable and transparent through decentralization and cryptographic hashing. A simple analogy to understand blockchain technology is Google Doc. When we produce a document and share it with the public, the document distributed rather than copied or moved. This creates a decentralized distribution chain through which everyone can access the document at the same time. No one is locked and waiting for changes from elsewhere while all changes in the document are logged in real-time, making the changes transparent.

Yes, blockchain is more complicated than a Google Doc, but the analogy is accurate because it illustrates three critical ideas about the technology. Blockchain is a particularly promising and revolutionary technology because it helps reduce risk, eliminate fraud, and create transparency in a scalable way for countless applications.

How Does Blockchain Work?

The objective of using a blockchain is to allow people, especially people who do not trust each other, to share valued data in a secure and inviolable manner.

The blockchain consists of three important concepts: blocks, nodes and miners.


Each chain consists of numerous blocks and each block has three basic elements:

  • The data in the block.
  • A 32-bit integer called the nonce. The nonce generated randomly when a block has created, which then generates a block header hash.
  • The hash has a 256-bit number attached to the nonce. It must start with a large number of zeros (that is, be minor).

When the main block of a chain has produced, a nonce generates the cryptographic hash. Block data has considered signed and forever linked to the nonce and hash unless it had extracted.


Miners create new blocks in the chain through a process called extraction.

In a blockchain, each block has its own nonce and hash, but also refers to the hash of the previous block in the chain, so extracting a block is not easy, especially with large chains.

Miners use special software to answer the complicated math problem of finding a nonce that generates an accepted hash. As, the nonce is 32 bits and the hash is 256, there are nearly four billion possible nonce hash combinations that must extract before the right one is found. In this case, the miners would have found the “golden nonce” ¬†and added their block to the chain. To make a change to a block earlier in the chain. Not only the block with the move but also all subsequent blocks must check again. Because of this, it is extremely tough to manipulate blockchain technology. Think of this as “mathematical certainty” because finding gold nuns takes a lot of time and computing power. If a block extracted successfully, the change is accepted by all nodes of the network. And the minor is rewarded financially.


One of the most significant concepts in blockchain technology is decentralization. No computer or organization can own the chain. Instead, it is a register, distributed among the nodes connected to the chain. They can be any type of electronic device that keeps copies of the blockchain and keeps the network running. Every single node has its own copy of the blockchain, and the linkage must algorithmically approve each newly mined block so that the chain can be updated, accepted, and verified. Since, the blockchains are transparent, every action in the general ledger can easily checked and displayed. Each participant receives a unique alphanumeric identification number that shows their transactions.

By combining public information with a system of mutual control, the blockchain can maintain integrity and strengthen trust between users. Blockchains can primarily be viewed as scalability of trust in the technology.

Beyond Bitcoin: Ethereum Blockchain

Blockchain has developed as an ultra-transparent accounting system for Bitcoin and has long been associated with cryptocurrency. The rights and security of technology, however, lie in a range from one to another than the Ethereum blockchain. At the end of 2013, the Russian developer Vitalik Buterin working on a white paper in which a platform given so that the traditional blockchain works with a certain similarity: the execution of computer code. This is how the Ethereum project does it. With the Ethereum blockchain, you can develop the program to lose those in the blockchain.


Ethereum programmers can create tokens to manage, own, and have a set of programming instructions for any type of digital asset. Tokens can be music files, contracts, or even a patient’s medical record. This what blockchain used to penetrate other contexts like the media, government, and identity security. Partnerships related to emerging technologies.

Blockchain challenges the new status quo of innovation for companies experiencing disruptive effects such as peer-to-peer energy distribution or decentralized forms for the media. As with the definition of blockchain, the management of the use of the general ledger system will only develop with the development of technology.


Blockchain has an almost unlimited number of applications in virtually all industries. Ledger technology can be used to track financial fraud, securely send medical records with healthcare specialists, and is even an enhanced way to track corporate intellectual property and artist music rights.

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