What is Block Chain Technology in Crypto Currency?

Blockchain technology is currently most widely used in the cryptocurrency known as Bitcoin. But Blockchain technology is also being used in various fields.

Those who are familiar with online transactions, stock markets, and cryptocurrencies will already be familiar with the term Blockchain. No worries if you are not familiar with Blockchain. After reading this post you will know about Blockchain completely. 

Blockchain technology is currently most widely used in the cryptocurrency known as Bitcoin. But Blockchain technology is also being used in various fields.

What is Blockchain?

Blockchain is explained in English as “blockchain a distributed, decentralized, public ledger”. Blockchain means a ledger of transactions maintained at various locations. For example, all the information about the money transactions we do in banks is stored in the bank's server (one place). But in blockchain technology, the same information is stored in different places.

When a transaction takes place, its details are sent as a “block”. They will encrypt the information in that block and give a unique number called "hash" to each box. Each box has a unique hash. The second block contains the hash of the first block. This is what each box looks like. This is called Blockchain because many blocks are linked together like a chain.

How is Blockchain technology used in Bitcoin technology?

Blockchain technology is used in the leading cryptocurrency Bitcoin. As far as our country is concerned, RBI is the government of India's organization that creates the money that can be used at present, similarly, in many countries, organizations belonging to those countries create money for their country. It can only be done with the help of a third party such as a bank while using it for transfer.

We use a bank to transfer money. An account is opened for us in the bank. The account stores information about how much money we pay and withdraw. If we want to buy any product, we will use a bank card to buy it. The bank will give the money from our account to the seller of the product. A bank is no such place when it comes to Bitcoin. Then there is the information stored? How does the money transfer work?

Blockchain technology is the answer to these questions. Not all Bitcoin information is stored on a single server. Instead, the entire information is stored in the accounts of everyone who can hold Bitcoin. It means that instead of the bank storing our details, each of us stores everyone else's information. Every time someone makes a transaction, all the information about it is sent to all the servers that may be connected to the Blockchain network.

You may ask what is the use of this. No organization like a bank can monitor us. Even if someone has hacked the information on one computer, it will be compared with the information on other computers. So it can be understood that Blockchain technology is a method of storing the same information in different places. The use of Blockchain in each technology may be different.

Blockchain Technology is Secure or Not?

Blockchain technology has three security features. Accordingly

  • hash 
  • proof of work 
  • distributed network
1. Hash

For example, Bitcoin uses a hash cryptosystem called SHA-256. When a money transaction takes place a block is created containing the details. The information contained in it will be of different sizes. They will then convert them into a different identity using SHA-256 cryptography. 

Perhaps if hackers change the information in a block, the block's hash number will also change. If it changes, the block next to that block will not match the existing block number. So it will be detected that something has gone wrong here.

2. Proof of work

With the help of supercomputers available today, many blocks can be opened very quickly, the information transferred and then combined accordingly. A second safety feature has been introduced to prevent this from happening. According to this, if you want to make a change in a block, you have to go through the proof of work section. 

Proof of work is finding the answer to a very difficult puzzle. If you want to do this, you need very powerful computers. Even so, it takes at least 10 minutes. This is also difficult because a blockchain can have millions of blocks.

3. Distributed network

Let's assume hackers have passed this too. Next is the third layer of security called distributed network. Accordingly, everyone on the blockchain has a copy of the same information. Maybe even if the hacker changes only the data on one computer, when a new block is created, it's sent to all servers. 

Then other computers will detect that particular block as fake and reject it. This means that a new block will only be accepted if 51% of the computers in a network accept it. 51% of computers need to be hacked if hackers need to be hacked. This is also impossible.

Post a Comment