โ Lesson 91: The Blockchain Ledger โ How Data is Stored and Secured ๐๐
Ever wonder where all your crypto transactions are recorded?
They live inside the blockchain ledger โ the digital brain of the entire system.
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๐ What is the Blockchain Ledger?
A ledger is just a record book.
But the blockchain ledger is special:
Itโs decentralized โ no single owner
Itโs immutable โ nothing can be altered once added
Itโs transparent โ anyone can verify the data
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๐งฑ How It Works:
1. โ Every transaction is grouped into a block
2. ๐ง That block is cryptographically linked to the previous one
3. ๐ These links form a chain of blocks โ aka, blockchain
4. ๐ฅ Thousands of computers (nodes) verify it before it's added
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๐ Why Itโs Secure:
Every block contains a unique hash
If you try to change anything, it breaks the chain
The network rejects any block that doesnโt match the original history
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๐ง Real-World Analogy:
Imagine a Google Sheet that updates in real timeโฆ
โฆbut every row is locked forever once itโs filled โ and the whole world can see it.
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๐ก This is what gives Bitcoin, Ethereum, and other blockchains their unstoppable trust.
No central authority โ just code, consensus, and cryptography.
Follow me to keep learning the system thatโs changing the financial world forever ๐
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