Proof of work is a consensus method in which miners compete to solve a costly math puzzle. The winner adds the next block and earns new coins and fees. Bitcoin, Litecoin and Dogecoin use it.
Esta entrada aún no está traducida, por eso se muestra en inglés.
Solving the puzzle takes real electricity and specialized hardware. To rewrite past blocks, an attacker would need more computing power than the rest of the network combined, which is enormously expensive on a large chain.
Proof of work uses a lot of energy, which draws environmental criticism. Supporters answer that miners increasingly use cheap surplus or renewable power, and that the cost is exactly what makes the ledger hard to attack.
Proof of work secures the chain with computing power and electricity; proof of stake secures it with coins locked up as collateral by validators.
Technically yes, but with industrial miners competing, a home setup rarely covers its electricity bill. Most small miners join a pool.