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Blockchain Mastery Course

From Scratch: What is a Blockchain?

At its core, a blockchain is simply a distributed digital ledger. Imagine a public spreadsheet that is duplicated thousands of times across a network of computers. Every time someone wants to update this spreadsheet, the entire network must agree that the update is valid.

Key Characteristics

  • Decentralization: No single entity controls the network.
  • Immutability: Once data is written, it cannot be altered or deleted.
  • Transparency: Anyone can view the transaction history.

For junior developers entering the space, it's crucial to stop thinking of a database housed on AWS, and start thinking of a global, unstoppable world computer where every participant helps maintain the truth.