Bitcoin Glossary

Proof of Work

Also known as: proof-of-work

A consensus mechanism where miners compete to find a valid hash by expending real energy, making attacks economically expensive. Bitcoin's security model since day one.

Lessons mentioning "Proof of Work"

Bitcoin vs Ethereum: Key Differences Pre-Bitcoin Era Consensus Mechanisms: PoW vs PoS vs Others Security Track Record Block Inclusion and Confirmations Bitcoin Mining Explained Network Attacks and Defenses Chain Reorganizations and Consensus