PoS depends on a validator’s economic stake in the network. It is framed as more environmentally friendly because it does not depend on an external energy intensive process as PoW. There is no block rewardWhat is a Block Reward? A block reward is the reward a miner... More in PoS. To conduct a 51% attackWhat is a 51% attack? An attack in which malicious actors ga... More, you would need to control 51% of the total stake; in proof-of-work, you would need more than 51% of the total hash power. Proof of AuthorityIn Proof of Authority (PoA), instead of offering up a resour... More is a variant of the Proof of StakeWhat is proof of stake in blockchain technology? The proof o... More consensusConsensus is a mechanism, usually used by most nodes on the ... More mechanism where instead of tokens, network participants stake their identity and reputation.