blockchain ppt

1. Blockchain Technology
Dr. Sujatha Srinivasan,
Associate Professor in Computer Science,
Dept. of Computer Science,
SRM Institute for Training and Development,
Ekattuthangal, Chennai - 32

2. Overview
1. Background
2. What is Blockchain Technology
3. Why Blockchain Technology?
4. How it works?
5. Applications
6. Job opportunities
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3. 1. BLOCKCHAIN
TECHNOLOGY -
BACKGROUND
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4. History
• Introduced in 1991 by Stuart
Haber and W. Scott Stornetta.
• Later developed by Nakamoto
in 2008
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5. What is a Block?
• Blocks
• Blocks hold batches of valid transactions that
are hashed and encoded into a Merkle tree.
• Each block includes the cryptographic
hash of the prior block in the blockchain,
linking the two.
• The linked blocks form a chain.
• This iterative process confirms the integrity of
the previous block, all the way back to the
original genesis block.
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6. What is Blockchain?
• A blockchain is, an immutable time-
stamped series record of data that is
distributed and managed by cluster of
computers.
• A Blockchain is a chain of blocks which
contain information.
• The data which is stored inside a block
depends on the type of blockchain.
• For Example, A Bitcoin Block contains
information about the Sender, Receiver,
number of bitcoins to be transferred.
• The first block in the chain is called the
Genesis block.
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7. 2. WHAT IS BLOCKCHAIN
TECHNOLOGY?
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8. What is Blockchain
Technology?
• Based on a peer-to-peer (P2P)
topology, blockchain is a distributed
ledger technology (DLT).
• It allows data to be stored globally on
thousands of servers – while letting
anyone on the network see everyone
else's entries in near real-time.
• That makes it difficult for one user to
gain control of, or game, the network.
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9. 3. WHY BLOCKCHAIN
TECHNOLOGY?
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10. Why Blockchain technology?
• To implement a system where
document timestamps could not be
tampered with.
• For carrying out safe digital
transactions.
• To serve as public transaction ledger
that no one can change but everyone
can see
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11. Uses of Blockchain
Technology
• Initially, used for Bitcoin and other
cryptocurrencies.
• Blockchain has now found use cases in
several industries including finance,
real estate, and health.
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12. 4. HOW BLOCKCHAIN
TECHNOLOGY WORKS
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13. Blockchain technology – How?
• A Blockchain is a type of diary or spreadsheet
containing information about transactions.
• Each transaction generates a hash.
• A hash is a string of numbers and letters.
• Transactions are entered in the order in which
they occurred. Order is very important.
• The hash depends not only on the transaction
but the previous transaction's hash.
• Even a small change in a transaction creates a
completely new hash.
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14. Blockchain technology – How?
• The nodes check to make sure a transaction has
not been changed by inspecting the hash.
• If a transaction is approved by a majority of the
nodes then it is written into a block.
• Each block refers to the previous block and
together make the Blockchain.
• A Blockchain is effective as it is spread over
many computers, each of which have a copy of
the Blockchain.
• These computers are called nodes.
• The Blockchain updates itself every 10 minutes.
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15. Working of Blockchain
Technology
• https://www.youtube.com/watch?v=SSo
_EIwHSd4
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16. 5. APPLICATIONS
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17. Realtime Uses of Blockchain
technology
• Supply chain management
• Digital ID
• Healthcare
• Wills and inheritance
• Food safety
• Digital Voting
• Real Estate
• Data sharing …….
• AND MANY MORE
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19. A Practical example
• Food safety
• Intriguing use of blockchain in food safety
is the ability to trace your food from its
origin to your plate.
• Using the immutable nature of blockchain,
the transport of food products from their
origin to the supermarket can be traced.
• In the case of food-borne illnesses, the
source of the contaminant can be traced
quickly and accurately.
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20. 2/2/2023 20
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SUGUNA CHICKENS

21. 6. JOB OPPORTUNITIES
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22. Blockchain Jobs – Naukri.com
Listing
• Blockchain Developer
• Blockchain Architect
• Technology analyst
• Blockchain software engineer
• Solution architect
• Project manager
• UX designer
• Quality engineer
• Legal expert
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23. Other Connected Roles
• Accountants
• Public Relations
• Marketers
• Crypto journalists
• Managers
• Crypto brokers
• Analysts
• ICO advisors
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24. Skill set required
1 . You need to learn and Build Some
Coding skills
2. Learning Java, JavaScript, HTML,CSS
will be added bonus.
3.Learn Any One Blockchain Platform like
Ethuereum, Hyperledger
4.Understand the complete blockchain
technologies and their uses
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25. Certificate courses
• Cryptocurrency Certification
Consortium
• They offer three different types of
certificates, Certified bitcoin
professional, Certified Bitcoin expert
and Certified Ethereum developer.
• https://www.quora.com/How-do-I-build-
my-career-in-blockchain-as-a-non-
technical-person
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26. References
1. Haber, Stuart; Stornetta, W. Scott
(January 1991). "How to time-stamp a
digital document". Journal of
Cryptology. 3 (2): 99–111.
2. Nakamoto, Satoshi (24 May
2009). "Bitcoin: A Peer-to-Peer Electronic
Cash System“
3. Nakamoto, Satoshi (24 May
2009). "Bitcoin: A Peer-to-Peer Electronic
Cash System“
http://www.bitcoin.org/bitcoin.pdf
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27. References (Web)
1. https://gomedici.com/30-non-financial-use-
cases-of-blockchain-technology-infographic
2. https://www.blockchain-
council.org/blockchain/top-10-real-world-
applications-of-blockchain-technology/
3. https://en.wikipedia.org/wiki/Blockchain
4. Job opportunities in Blockchain technology
https://www.cloudcredential.org/blog/career-
opportunities-in-blockchain/
5. https://cointelegraph.com/bitcoin-for-
beginners/how-blockchain-technology-works-guide-
for-beginners
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28. THANK YOU
AND
QUESTIONS
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