What is Blockchain?


Blockchain is a growing list of records, called blocks, that are linked using cryptography. Each block contains the cryptographic hash, timestamp, and transaction data of the previous block. The blockchain has created a lot of buzzes these days. And because it is the backbone of the world’s most famous cryptocurrency – bitcoin. Many governments and leading banks have decided to bring in their traditional transactions based on the blockchain concept. The applications and potential of this framework are huge and are considered to be changing the way transactions are conducted across different domains.

Also read:-What is bitcoin? what are the advantages of using it?


The blockchain network has no central authority – it is the very definition of a democratic system. Since this is a shared and immutable ledger, the information in it is open to anyone and everyone. Therefore, anything built on the blockchain is transparent in its nature and everyone involved is accountable for their actions.

Black chain history

The first work on a chain of cryptographically secured blocks was published in 1991 by Stuart Haber and W.W. Described by Scott Storenetta. They wanted to implement a system that would damage document timestamps. In 1992, Bayer, Haber, and Stornetta incorporated Merkle trees into the design, improving its efficiency by allowing multiple document certificates to be collected in a single block.

The first blockchain was conceptualized in 2008 by a person (or group of people) called Satoshi Nakamoto. Nakamoto improved the design in a significant way by using a hashcash-like method to add blocks to the chain without the need for a trusted signature. Party. This design was implemented by Nakamoto the following year as a key component of the cryptocurrency bitcoin, where it serves as the public ledger for all transactions on the network.

In August 2014, the Bitcoin blockchain file size of all transactions on the network reached 20GB (gigabytes). In January 2015, the size increased to nearly 30 GB and from January 2016 to January 2017, the bitcoin blockchain increased from 50 GB to 100 GB.

The terms block and chain were used separately in Satoshi Nakamoto’s original paper, but by the end of 2016, they became popular as a single word blockchain.

Smart contracts that run on the blockchain, for example, “create invoices that pay for themselves when shipping or share certificates that automatically send dividends to their owners if profits reach a certain level.” Off-chain Oracle requires access to “external data or events based on time or market conditions to interact with the blockchain.”

According to Accenture, the application of the expansion of innovation theory suggests that blockchains achieved a 13.5% adoption rate in financial services in 2016, thus reaching an early adoption stage. Industry trade groups joined forces to create the Global Blockchain Forum in 2016 with the initiative of the Chamber of Digital Commerce.

In May 2018, Gartner found that only 1% of CIOs indicated the adoption of blockchain in their organizations, and only 8% of CIOs were in the short-term ‘planning or active experimentation with blockchain’

Author: praveen

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