Categories: Definitions

What is a Blockchain? – Definition, Functions, Origin, And More

Definition Blockchain

A blockchain is an increasing file of records called blocks; these blocks connects by the use of cryptography. Every block carries a cryptographic hash of the last block, a timestamp, and transaction data. By design, a blockchain cannot undergo a modification of the data. Blockchain is a decentralized database.

How does it work?

It is easy to understand with simple examples. The blockchain is a technology that will make the world safer and that people have personalized products. The origin is the bitcoin currency, which is the first use that has allowed us to think of thousands of applications that will significantly improve the world.

It is the most significant socio-technological advance that humanity will live; the fourth industrial revolution, after the steam engine and mechanization, electricity and mass production, and the automation brought by electronics and information technologies.

Also read: What is a Laptop? – Definition, Features, Positives & Negatives, And More


It gives transparency to NGOs, elections, administration, and commerce. Goodbye to trade with our data, thanks to the decentralization of blockchain. The traceability of everything, another advantage.


Bitcoin cryptocurrencies

The source of blockchain is the bitcoin cryptocurrency, which is the first example of a blockchain or blockchain, which has allowed us to think about using its protocol for thousands of other things.

Until now, everything was under centralized databases. A blockchain is a distributed database. Well, a database that is not in one place and governed by a single person, but it gets distributed on different computers or nodes that are all equally important.

It is an accounting book that is replicated identically on all the nodes it is on. But each note, each new operation, or new block, also occurs in all of them. No entity has all the information. It gets distributed in copies updated in real-time among all nodes.

Think of a Lego block construction. Each block is a blockchain operation. Whenever a new block adds on, that block carries all the information from all of the above. That we cannot modify or delete.

How do you accept that all the nodes of the chain have a new block? There is the key; blockchain poses a mathematical challenge to the nodes, the first one to solve it sends the solution (unique, because it is mathematical) to others.

If the majority certifies that the result is correct, that block becomes capable of accepting them all. It becomes part of the chain, with all the previous information and the permanent certification of the moment in which that operation took place. Thus, the network works by consensus between the parties. It is inviolable. Once a transaction approves in the master book, we can no longer delete or modify it.


Blockchain replaces trust with mathematical truth. Goodbye to fraud, everything is transparent and auditable by everyone live, and blockchain is full security, everything gets encrypted with asymmetric cryptography.

Also read: What is Advertising? – Definition, Benefits, Techniques, And More

Review What is a Blockchain? – Definition, Functions, Origin, And More. Cancel reply

Kamran Sharief

I write about technology, marketing and digital tips. In the past I've worked with Field Engineer, Marcom Arabia and You can reach me at

Published by
Kamran Sharief

Recent Posts

11 Proven Tips To Get More Social Media Followers

Social media is the most used communication platform and has successfully connected the whole world.… Read More

May 28, 2022

Protect Yourself From Hackers In Just 3 Steps

Mark the Premonition of the expert! Cybercrime will hit the world hard and cost a… Read More

May 27, 2022

Operator Licensing Procedure in Poland

Operator Licensing Procedure in Poland Setting up an online casino Poland requires obtaining a license.… Read More

May 27, 2022

How Demand Sensing is Better than Demand Forecasting and What are the Ways to Improve Forecasting

For businesses to gain an edge over the competition, strategy makers must pick up signals… Read More

May 27, 2022

Which is the best voice to use for my Text to Speech (TTS) project?

Text-to-Speech is an advanced assistant technology that can read digital text. It reads words on… Read More

May 26, 2022

Top Prediction For Web3 & Crypto Economy For 2022

The internet has changed our lives and has brought us close together in ways we… Read More

May 25, 2022