Block and chain, since the word suggests, a series made of blocks! So we know very well what are these blocks. Blocks can be a kind of database! People who focus on computers know databases very well! And for people that do not know, when we say in simple language, then this database is named Collection of Data! Data, hardly anything else, whatever information you type using the pc, that details are stored inside the electronic form within the computer! Similarly, every information about the Internet is a form of data! And this can be a collection of data database! This database is saved in the computer so that it can often be searched.

In blocks, the database is collected in groups and this group is known as blocks. Each block carries a limited space or ability to collect the database! And when a block is entirely filled while using database, it is automatically linked to the next block! In this way one block gets mounted on another block! And there's a series! This is what is known as the chain of blocks, that is certainly, the blockchain!




What include the elements of Blockchain?
There are three types of elements in the blockchain-

Data stored in blocks
Hash (Transition Hash) generated from that transition
Hash.(Previous Hash) from the first block linked to that block
Note - The first block inside blockchain is named the Genesis Block!
What are nodes in blockchain?
The computers on which blockchain information is stored! They are called nodes and many types of the nodes which can be connected to the blockchain have a very copy with the blockchain! Which updates every ten minutes! With the help of these nodes, it is usually found out using a Hash make certain there has become no alternation in it. If all of the transitions inside the blockchain are authorized by the nodes, that is, the evidence of work is approved, chances are they are developed in blocks! With the help of nodes, the data in the blockchain is stored, spread and preserved. A copy of each and every transition made inside blockchain on each with the nodes is updated every 10-10 minutes! That's why it can be considered safe!

How does blockchain process?
Each block features a cryptographic hash of the previous block that's generated on every transition made inside blockchain! Hash is really a string of numbers and letters. That is, Hash is a mathematical function that encrypts the input data into the output of a limited length. So, no matter the size from the input data, the Encrypted Unique Hash is definitely of a set size! And at the same time it can be also linked to the Hash produced from the previous block's transition!

Why is blockchain technology considered secure?
If someone wants to edit the database of this Blockchain Technology, another new hash is generated! Due to which the setting of all after blocks is changed and it really is easy to know where the setting has become changed! So no-one can tamper with the info on this blockchain! Now if you understand that you have to make some changes inside the block chain, then you've got to show the proof work, that's, for whatever changes you will make, each of the computers (Nodes) connected to the blockchain need to make this change. The information needs to be sent and only if the majority from the computers approve, then you can definitely change it!

Where can blockchain technology be used in the future?
In preventing corruption
Yes, corruption may be prevented by making use of blockchain technology because whatever database is kept in the blockchain is copied on every nodes if anyone would like to change the data then everybody else will know regarding it!

In maintaining government records
The using blockchain technology in government offices can be very secure.

Anyone whose name is held in the database cannot often be changed while investing properties using Blockchain technology! Due to which any disputes regarding properties arrive down.

Patient record keeping within the hospital
If each of the information in connection with patients is kept in the blockchain, it will be correct and anyone will be able to access it.

In virtual currency | In Cryptocurrency
People have already started investing within the cryptocurrency you happen to be seeing within the online market like bitcoin, ethereum, dogecoin etc this also currency keeps growing faster than gold! One advantage with this is that it really is decentralized i.e. it doesn't require any middleman like inside the ordinary currency we use, we must use banks to transfer money in one place to another! And they also charge some fees because of this, banks won't be needed in the transition to Cryptocurrency! And you will likely be able to transact with crypto currency anywhere within the world!