The document presents an overview of blockchain technology, including its definition as a distributed ledger and its applications primarily in cryptocurrency like Bitcoin. It discusses the architecture, technology, advantages, disadvantages, and future scope of blockchain while highlighting its potential across various industries. The conclusion emphasizes blockchain's ability to enhance business networks by reducing costs and improving efficiencies.

1. Blockchain
Technology
Presented By
Priya Deshmukh

2. INDEX
1. What is Blockchain
2. History of Blockchain Technology
3. Blockchain Architecture
4. The Technology Used in Blockchain
5. Purpose of Blockchain
6. Blockchain in Cryptocurrency
7. Blockchain Application Areas and Examples
8. Advantages and Disadvantages of Blockchain
9. Future Scope of Blockchain
10. Conclusion

3.  Blockchain is a distributed database but its stored devices are not connected to a
shared server.
 In blockchain list of records is stored as blocks and they are linked by using
cryptography.
 Hence we can say that blockchain is a digital record and is used for recording
transactions made with cryptocurrencies such as bitcoins.
 If we add a new block it can be linked with the previous block with the help of a
cryptographic block generated from the previous block. By doing so the block is
permanently recorded and it is not broken.
 In blockchain previous transactions alteration is very difficult because all subsequent
blocks also need to be altered. We can say that blockchain is the purest peer-to-peer
database that is immutable.
What is Blockchain?

4. Definition of Blockchain
It is an open distributed ledger that
record transactions between two
persons efficiently and in a
verifiable and permanent way.
Each transaction is secured with a
digital signature that proves its
authenticity. Every block contains a
cryptographic hash of the previous
block, a time stamp and transaction
information.

5. Origin of Blockchain Technology
 The blockchain was created by a person (or group of people) using the name (or
pseudonym) Santoshi Nakamoto in 2008 to serve as the public distributed ledger for
bitcoin cryptocurrency transactions, based on previous work by Stuart Harbor, W. Scott
Storentta, and Dave Bayer. The identity of Satoshi Nakamoto remains unknown to date.
 The implementation of the blockchain within bitcoin made it the first digital currency to
solve the double-spending problem without the need of a trusted authority or
central server. The bitcoin design has inspired other applications and blockchains that
are readable by the public and are widely used by Cryptocurrency. The blockchain may
be considered a type of payment rail.
 Private blockchains have been proposed for business use. Computerworld called the
marketing of such privatized blockchains without a proper security model “Snake
Oil"; however, others have argued that permitted blockchains, if carefully designed, may
be more decentralized and therefore more secure in practice than permissionless ones

6. Architecture of a Blockchain System

7. The Technology used in Blockchain
 Cryptographic Keys
 Network Protocol
 Distributed Ledger Technology
 Hashing

8. Purpose of Blockchain
 Blockchain uses an online ledger which is very secure.
 There is no third-party interference.
 It used distributed ledger which is very transparent.
 It is a digital world offering many new tools and there are many centralized administrators.
 Since there is no third-party guarantee cost is very low.

9. Blockchain in Cryptocurrency
 The term blockchain is often used to refer to cryptocurrency.
Cryptocurrency is a medium of exchange such as US dollars.
 It is just an application in the form of e-currency using blockchain.
 It is not governed by any financial institution.
 The main difference between blockchain and cryptocurrency is
that cryptocurrency is created and held electronically in forms such
as a virtual wallet.
 It is decentralized and it is not governed by anyone whereas
blockchain is an advanced record and it has all information related
to cryptocurrency exchanges over a shared system.

10. Application Areas
• Google
• Amazon
• Facebook
• Apple
• BitTorrent
• CryptoKitties
• Uniswap
• Ethereum
• UPI
• Banking Application
• Stock Exchange Apps
• Web Browser

11. Blockchain Examples
 Blockpoint simplifies the payment system
and allows Mobile wallets, gift card, and
another point of scale functionality.
 Play-to-earn games are a subset of
blockchain games as they allow players to
earn crypto from playing.

12. Advantages of Blockchain
 Greater Transparency
 Highly secure
 Easily traceable
 High efficiency and speed
 Low cost
 Zero percentage of fraud
 Extremely volatile

13. Disadvantages of Blockchain
 More power consumption
 Can be a regulatory problem for financial institutions
 scalability

14. Future Scope OF Blockchain Technology
 HealthCare
 Transaction Speed Increased
 New Industry Opportunity
 Criminal Tracking
 Cyber Risk Reduced
 Voting System

15. Conclusion
 Blockchain is a shared, replicated ledger.
 IBM Supports an open standards, open source, open governance
blockchain.
 Blockchain can open up business networks by talking out cost, improving
efficiencies and increase accessibility.
 Blockchain addresses an exciting and topical set of business challenges,
which cross every industry.

16. Thank You!

17. Any Questions?