minimal ppt of blockchain , blockchain working, blockchain vs bitcoin, advantages and disadvantages

1. Blockchain

2. Blockchain Technology
• A block chain is a continuously growing list
of records.
• The first work on a cryptographically
secured chain of block was described in 1991
by Stuart Haber and Scott Stornetta.

3. • Stuart Haber Scott Stornetta.

4. • In 1992 Bayer , Harber and Stornetta
incorporated merkle tree to design, to
improve efficiency.

5. • The first blockchain was conceptualized by
Satoshi Nakamoto in 2008.
• Then he implemented the core component
of
the cryptocurrency bitcoin.

6. • In block chain each block typically contain
a cryptographic hash of the previous block ,
a time stamp and transaction data

7. • It is an open ,distributed ledger that can
record transactions between two parties
efficiently in a permanent way.
• A block chain is typically managed by a
peer-to-peer network communication and
validating a new blocks.
• Blockchain technology offers a solution to
many data security issues, where data can
be uniquely authenticated in an irrefutable,
immutable, and secure manner

8. WORKING OF BLOCKCHAIN
TECHNOLOGY

9. Working of blockchain
• Blockchain is a chain of blocks that’s
contains information
• Blockchain is a decentralized ledger
• A block contains
 Data
 Hash
 Hash of previous block

11. DATA
• It store inside block
• It depends on the type of blockchain

12. HASH
• Unique
• Change will cause hash to change

13. HASH OF THE PREVIOUS
BLOCK
• This effectively create a chain of block

15. Changing a single
• Changing a single block will make all
following blocks invalid.
• So, must want to recalculate all hash values
of all following blocks.
• To make your block chain valid.
• proof of work: verify and which satisfies
certain requirements.

17. Peer to peer network
• Using central entity to manage the chain
blockchains uses a peer to peer network
everyone allow to join in
• Someone join this network he get full copy
of blockchain it used to verify

18. Someone create a new block
• It send to everyone in network.
• The node verify the block and add to block
chain
• They agree about which block is valid.

20. BITCOIN VS BLOCKCHAIN

21. BITCOIN
• Bit coin uses blockchain
• It sits on top of block chain
• We don’t want to think about currency
• Limited amount of bitcoin

22. • Way to get out of bitcoin is to mine it .
• Bitcoin starting to be mare popular at a
cryptocurrency
• Transactional value gets reduced

23. Blockchain
• Bitcoin actually uses Blockchain
• If you are sending a piece of information or
money from a to b
• A send to it’s bank and bank transfer to
their bank and then give to them.

25. Pros
• Disintermediation
• Faster transformation
• Empowered Users
• Lower Transaction costs
• Process integrity

26. Cons
• Performance
• Signature verification
• Redundancy