• Proof of Work (PoW) is a decentralized consensus mechanism that requires network participants to make an effort to solve an arbitrary mathematical puzzle so that no one can fool the system.

  • Proof of work is widely used in cryptocurrency mining, to verify transactions and mine new tokens.
  • With proof-of-work, bitcoin and other cryptocurrencies transactions can be processed peer-to-peer in a secure manner without the need for a trusted third party.
  • Proof of work at scale requires a huge amount of energy, which only increases as more miners join the network.
  • Proof of Stake (POS) was one of several new consensus mechanisms created as an alternative to proof of work.