What Is PoS (Proof of Stake)?
Also known as: Proof of Stake, PoS
In short
Proof of Stake (PoS) is a consensus mechanism in which the right to produce and validate blocks is distributed according to the amount of the network's native coin that participants lock up (stake) as collateral.
In PoS networks, there are validators instead of miners. Validators lock their coins as collateral; the protocol selects the validator who will propose the next block, usually with a probability proportional to the stake amount, and the others cast votes to attest to the block. Validators who follow the rules earn rewards; for dishonest behavior such as double signing, part of their stake is cut (slashing).
PoS's main advantage is energy efficiency: security rests not on spending electricity and hardware but on the economic value put at risk. Ethereum moved from Proof of Work to PoS with The Merge in September 2022, and the network's energy consumption fell dramatically. Networks such as Cardano, Solana, Avalanche, and Polkadot also use different variants of PoS; delegated proof of stake (DPoS) is one of the well-known examples of this family.
The main criticisms aimed at PoS are that the influence of large stakeholders and exchanges can grow, and theoretical security issues such as long-range attacks. To reduce these risks, measures such as finality checkpoints and waiting periods on stake withdrawals are used.
Last updated: · This content is for information purposes only and is not investment advice.