Blockchain is a digital system for storing and exchanging information securely and transparently, without the need for an intermediary (like a bank or central authority).

Let me explain it step by step 👇

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⚙️ 1. The Basic Idea

Imagine a ledger (like a bank ledger), but this ledger:

Is distributed across thousands of computers around the world.

It cannot be manipulated because every operation (transaction) is recorded in an encrypted manner.

Everyone has a copy of it, and thus there is no central authority controlling it.

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🧱 2. The Meaning of the Word Blockchain

The word consists of two parts:

Block: Contains a set of transactions.

Chain: Each block is linked to the previous block by a "hash" (encrypted signature).

This means that each block contains the fingerprint of the previous block, forming a connected and secured chain.

🔗 A Simple Example:

Block 1 → Block 2 → Block 3 → Block 4 ...

If someone tries to change information in Block 2, the hash changes, and the entire chain becomes invalid,

thus the manipulation is detected immediately.

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💰 3. What is it Used For?

Blockchain is the foundation for many technologies such as:

Digital currencies (like Bitcoin and Ethereum)

Smart contracts

Electronic voting systems

Supply chains (tracking products from source to customer)

Secure digital identity

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🔐 4. Features

✅ Transparency: Anyone can see the operations.

✅ Security: It's very hard to manipulate or hack.

✅ Decentralization: There is no control from a single entity.

✅ Trust between