Blockchain for Dummies. Let’s break down blockchain in simple… | by Naouress Akrouti | The Capital | Mar, 2025

Let’s break down blockchain in simple terms so even a beginner can understand it.

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Blockchain is a digital ledger (like a record-keeping book) that stores information in a secure, transparent, and tamper-proof way. It’s best known for powering cryptocurrencies like Bitcoin, but it can be used for much more.

Think of it as a chain of blocks, where each block contains a list of transactions or data. Once a block is added to the chain, it’s very hard to change, making it secure and trustworthy.

1. Decentralized: No single person or company controls the blockchain. It’s run by a network of computers (called nodes) around the world.
2. Transparent: Everyone in the network can see the transactions, but they’re often anonymous.
3. Secure: Data in a block is encrypted and linked to the previous block, making it nearly impossible to alter.
4. Immutable: Once data is added, it can’t be changed or deleted.

1. Transaction Request: Someone requests a transaction (e.g., sending cryptocurrency).