Hello steemit friends ❤️
how are you.
Write the definition of blockchain. And how our data on Blockchain is protected from hackers. ? And write details about Data, Hash and Previous Hash tag and explain through screenshot.
Q(1)# write the definition of blockchain ?
Ans:Blockchain refers to being a data cache and combining all the blocks to become a challenge, such as when too many blocks are combined to form a chain and what happens to the data inside the blocks or Cannot delete or remove or change it.
blockchain
Let me tell you about a single blog
Three types of data are saved in a single block.
(1)Relevant info
The information that is saved in a single block, for example the crypto academy that we transact, is also saved in a block.It has a record inside the blockchain but it is also saved in the single block.If we do bitcoin transactions, the data or code that is being saved is from inside the blockchain.I want to make it clear to you that those who work at the common steam crypto academy, this team is working on other academics, their transactions in the form of steem and dollars.This data is also being saved in a single block which is part of the blockchain.
(2) Hash
I want to tell you about it in my own way.
We live in pakistan.And we have to make a national identity card.The card is identified by a number.In Pakistan, there is a number issue on the ID card which is different for each person.The number on the top of his ID card can tell him what region he belongs to, what religion he belongs to and what his education is. This is his personal code.From this example you can clearly see that.From this example you can clearly see that the hash does the same thing.
(3)Previ hash means:
Blocks when data is being saved.When one block is joined with another block, the current password is also inserted inside it.When chains are placed side by side, this chain becomes larger.What is his password would also be from inside the next block.
Data cannot be hooked inside blockchains.
Ans :Why
For example, if four people are working within a blockchain, they will have four copy that they have separately.If we challenge one copy, the other will not recognize it.If anyone has to fight China inside it.First, he will provide information to people inside all blockchains.I'm starting to change that.If they agree.They will vote on it again.The vote will show that you can change something inside it.This let all the members inside the blockchain know that this is a new change and it will happen with the data.
When the blockchain is running.
And when a password is put inside a block.If your password is correct.You can enter within the blockchain.If you enter an incorrect password inside a block.Let me tell you this clearly.It will be within the inside of the blocks that the bombardment puts wrong.There are more than a thousand blocks inside this blockchain.If you change the password of a block, it will take you ten minutes.And it will take you about two hundred years to change the password for about a thousand.Therefore, its security is better and the password of the necklace block cannot be changed and there is not much time.It has such tight office quality that it is impossible to go beyond its password.
Therefore, it is very difficult for the blockchain to be within it, so it has been given the task of saving a data that also keeps records.There is no delete and function within the blockchain.
The information I have provided you about Blockchain is based on my research.
I am very grateful to Prof. Yusuf Irfan Khan for making a good platform for us.
It is a matter of great pride for us that these Pakistani professors have been elected.And I thank them very much.