Blockchain
Proof of Stake (PoS)
Consensus where validators lock up tokens to secure the network.
Validators put up a stake (collateral) and are randomly selected to propose blocks. Misbehavior is punished by 'slashing' — losing part of the stake. PoS is dramatically more energy-efficient than PoW and is now used by Ethereum, Solana, Cardano and most modern chains.