Blockchain 101 | What is Blockchain? | Blockchain For Beginners | Blockchain Technology |Simplilearn

This Blockchain 101video will help you understand what is Blockchain, what is Bitcoin, why Blockchain, how does Blockchain work, applications of Blockchain, who uses Blockchain, Blockchain concepts which includes SHA-256 encryption, public and private key, distributed public ledger, proof of work, and mining.

Below topics are explained in this Blockchain 101video:
0:00 Introduction
0:37 Why we need Blockchain?
02:07 What are Bitcoin and Blockchain?
05:38 How does Blockchain work?
06:28 Features of Blockchain
- 06:54 SHA-256 encryption
- 08:31 Public and private key
- 09:53 Distributed public ledger
- 11:43 Proof of work
- 15:24 Mining
16:03 Applications of Blockchain
17:24 Who uses Blockchain?
18:01 Blockchain demo

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What is Blockchain Technology?
Blockchain technology is a structure that stores transactional records, also known as the block, of the public in several databases, known as the “chain,” in a network connected through peer-to-peer nodes. Typically, this storage is referred to as a ‘digital ledger.’ Every transaction in this ledger is authorized by the digital signature of the owner, which authenticates the transaction and safeguards it from tampering. Hence, the information the digital ledger contains is highly secure. The fascinating angle is that anybody can see the data, but they can’t corrupt it.

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[akshaygagrani]

This is the best Video I came through to understand, what blockchain is... It was really Helpful for everyone thanks @Simplilearn, Keep making such intro videos.

[ripmyheadof]

I believe there may be an error in the statement and slide at 13:35.

You mention that if the nonce is less than the target value the process is repeated. Isn’t this incorrect as the hash generated by the miners has to be less than the target value?
Also how do the miners know what the target value is? What is this Target Value?

[gopalshenoy]

It is a great video which was very helpful for a non techie to understand the concepts of blockchain. To make it even better, it would be great if the instructor does not read off the slides - it is kind of insulting to the viewer because we can very well read the slides. Instead, the instructor could add more information related to the slide to make it an impressive presentation.

[rick_pro_trader_]

how is it possible to modify a transaction? I thought transaction made in the blockchain stay there in the block and noone can change it. Are we talking about specific blockchain network? thanks!