A blockchain consensus mechanism which requires the staking (locking up) of coins to earn a chance of adding new blocks. The chances of becoming a validator increase the more coins one stakes.
There is incentive against adding a block with inaccurate information. If this occurs, the validator losing some of the stake.
Proof-of-Stake is gaining in popularity since it uses a lot less energy as compared to the Proof-of-Work (PoW) protocol.
General:
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