📚 In the previous article, we learned that blockchains use consensus mechanisms to make sure everyone agrees on the same transaction history.
One of the first and most famous consensus mechanisms is called Proof of Work.
Proof of Work is the system that powers the Bitcoin network and many early cryptocurrencies.
Proof of Work is a method where computers compete to solve complex mathematical problems.
The first computer to solve the problem earns the right to add the next block to the blockchain.
As a reward, that computer receives newly created cryptocurrency and transaction fees.
This process is known as mining.
Here are the key ideas behind Proof of Work.
1️⃣ Miners compete with computing power
Thousands of computers around the world try to solve a difficult mathematical puzzle.
2️⃣ The first solution wins
The first miner to solve the puzzle gets to add the new block to the blockchain.
3️⃣ Work proves honesty
Because solving the puzzle requires real computing power and electricity, it is difficult to cheat the system.
4️⃣ Rewards keep the network running
Miners receive crypto rewards, which motivates them to keep securing the network.
A simple example can help explain this idea.
Imagine a global competition where thousands of people are trying to solve a very difficult puzzle.
Whoever solves the puzzle first gets to write the next page in a shared record book and receives a reward.
After that, a new puzzle begins and the competition starts again.
Proof of Work works in a similar way.
Miners compete to solve puzzles, and the winner adds the next block to the blockchain.
This system makes the network very secure.
To attack the blockchain, someone would need enormous computing power to outcompete the entire network of miners.
That is why networks like Bitcoin are extremely difficult to manipulate.
📌 In the next article, we’ll explore:
How Proof of Stake works and why many modern blockchains use it instead of mining.
If you’re just starting to learn about crypto, follow the Crypto 101 series as we build the foundation step by step. 🚀
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