I decided to write this article to get an idea of exactly what blockchain is and how it is used, which we have heard for a long time. After we met Bitcoin, we actually heard more about blockchain. Because one of the areas where this technology is most feasible is the financial sector. I think, I should mention Bitcoin briefly.

Bitcoin is a decentralized cryptocurrency developed in 2009 by a person or group named Satoshi Nakamoto. So, it's a digital currency.

Although there are hundreds of altcoins in the market later on, bitcoin is the most popular and we can say that it is a pioneer trying to tell us what this technology can do.

Returning to the blockchain, we can define it as a distributed database system that provides encrypted data management.

Blockchain technology is not much different from other systems you have encountered before. It can see in what direction the information records we are talking about have been changed or updated. An example of this is the Wikipedia site.  That is, knowledge is not the monopoly of one person. It belongs to everyone.

When you look at the Wikipedia example roughly, you can see the similarity with this technology, but many features that make blockchain unique are hidden deep. While both work on distributed networks, Wikipedia is built on the World Wide Web (WWW) protocol and uses a client-server architecture.

In other words, we can say, a person who is authorized and has the necessary permissions can change or delete Wikipedia articles on the central server. Database control is in the hands of administrators and there is a central authority.

Today, this is how all banks, government systems, are managed with high protection and centered databases. All control, including the method of protection against cyber threats, belongs to the owners of the site. If we go through the Example of Wikipedia again, the original copy of Wikipedia is edited through a server and all users see the new version.

In blockchain use, each node on the network achieves the same result. They all update the recorded information independently of each other, and the most popular record becomes a kind of official record. At this point we can think about why this technology is so popular and useful.

This difference represents an innovation in recording and distributing information accurately and reliably, completely eliminating the need for a single central authority that we trust to facilitate digital relationships.