Blockchain for Computer science Students

1. BLOCKCHAIN
Presentation by the luminers

2. Fariha Rayhana Ferdows
Id no: 252 -15-566
Sadia Jahan Mahira
Id no:252-15-243
Most. Sumaiya Akter
Id no:252-15-117
OUR TEAM

3. Blockchain is digital ledger
that records transactions in a
secure ,decentralized way .
It is decentralized ,meaning no
single authority controls it.
Example analogy :like a shared
Google Doc where everyone
can view and verify changes
WHAT IS
BLOCKHAIN

4. Orgin: Bitcoin launched by satoshi Nakamoto
in 2008.Initially designed to support cryptocurrency
transactions.
History and Evolution
Evolution and Blockchain:
Blockchain 1.0: cryptrocurrencies
(bitcoin)
Blockchain2.0:Smart Contracts
Blockchain 3.0:Decentralized
application (DApps)

5. Blockchain is made of blocks that
store data.
Each block contains:
Data
Hash(unique code)
Previous block’s hash
Blocks are linked together in
chain
Miners validate new blocks via
proof of work
HOW IT WORKS

6. Transparency :All participants can
verify data
Security: Strong cryptography
protects the data
Consensus Mechanisms: Proof of
Work (PoW) and Proof of
Stake(PoS)
KEY FEATURES
Immutability :Data can’t be altered

7. APPLICATIONS
Cryptocurrencies: Bitcoin and Ethereum
Supply Chain Management: Track
goods in real-time
Healthcare: Secure medical records
Voting Systems: Transparent, Tamper
proof elections
Banking and Finance: Fast, secure
transactions

8. Smart Contracts and NFTs
Programs on the blockchain that automatically
execute actions when conditions are met
No middlemen needed
Fast ,cheap and secure transactions
NFTs (N0n-Fungible Tokens):
Unique digital assets(art ,music, collectibles)
Stored on the blockchain
Not interchangeable like cryptocurrencies
Blockchain Connection:
Smart contracts handle NFT ownership and
transfers
Blockchain ensures transparency ,security and
immutability.
Smart Contracts:

9. CHALLENGES
ENERGY CONSUMPTION: MINING CONSUMES
MASSIVE ENERGY.
SCALABILITY: NETWORKS CAN BE SLOW AND
COSTLY.
REGULATION & LEGAL ISSUES: UNCLEAR LAWS AND
RISKS.

10. Future of Blockchain
Integration with AI & IoT.
Green Blockchain: Eco-friendly solutions.
Enterprise Adoption: Widespread business
use.

11. Sources
Chatgpt
Gemini
Google
Chat bot al

12. THANK
YOU
Presentation by The Luminiers