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Proof of work: definition and meaning

Proof of work is a consensus method where miners spend computing power to add blocks. Bitcoin uses it.

Why it matters

It makes attacks expensive but uses a lot of energy.

Related terms

• Proof of stake
  Proof of stake is a consensus method where validators lock up coins as a deposit for the r…
• Mining
  Mining is the process of using computers to validate transactions and create new blocks on…
• Consensus mechanism
  A consensus mechanism is the set of rules a blockchain uses so participants agree on which…

Guides that explain more

• What Is Blockchain?
• Bitcoin vs Ethereum: Key Differences Explained

Educational content only, not financial advice.