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Proof of Work
Blockchain Basics•blog.difficulty.intermediate
Proof of Work (PoW) is a consensus mechanism where miners compete to solve complex mathematical puzzles to validate transactions and create new blocks.
Simple Explanation
Proof of Work is like a race where participants have to solve a difficult puzzle to win. The first to solve it gets to add the next block to the blockchain and earn a reward. The difficulty ensures no one can cheat or take over the network.
How It Works
- Miners receive pending transactions
- They compete to solve a cryptographic puzzle
- First to solve broadcasts the solution
- Other miners verify the solution
- If correct, the block is added to the chain
Energy Consumption
PoW requires significant computational power and electricity, which has led to concerns about environmental impact. This is why some blockchains are moving to alternative consensus mechanisms like Proof of Stake.
Used By
Bitcoin, Ethereum (before 2022), Litecoin, Dogecoin