Introduction to Blockchain
Learn the foundational concepts behind blockchain technology and its impact on modern systems.
What You Will Learn
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Definition: What blockchain really means.
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History: The origins and evolution of blockchain.
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Use Cases: Real-world applications of blockchain.
What is Blockchain?
Blockchain is a revolutionary technology that enables decentralized, secure, and tamper-proof record keeping. It forms the foundation of cryptocurrencies like Bitcoin, but its potential extends far beyond digital money.
At its core, a blockchain is a distributed ledger maintained by a network of computers (nodes). Each transaction or data entry is recorded in a block and cryptographically linked to the previous one, forming a chain.
This structure ensures transparency, security, and immutability—making it ideal for applications such as supply chain tracking, voting systems, smart contracts, and more.
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Brief History of Blockchain
Origins
The concept of blockchain dates back to 1991 when researchers Stuart Haber and W. Scott Stornetta introduced a cryptographically secured chain of blocks to prevent document timestamp tampering.
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Bitcoin and Beyond
In 2009, Satoshi Nakamoto implemented blockchain as the underlying technology for Bitcoin—the first decentralized cryptocurrency. Since then, blockchain has evolved into various platforms like Ethereum, enabling smart contracts and decentralized applications.
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Real-World Applications
Supply Chain
Track products from production to delivery using immutable records.
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Voting Systems
Ensure secure and transparent elections with verifiable digital ballots.
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Banking & Finance
Streamline transactions, reduce fraud, and enable global financial access.
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Knowledge Check
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