Proof-of-Work and Proof-of-Stake are the two most common consensus mechanisms.
Nevertheless, there are other consensuses that have been found and they include; Brain Evidence, Delegation Brain Evidence, Authority Evidence, etc.
This innovation comes with many improved features and allows for a more adequate and better use.
Just like the Bitcoin blockchain, and other blockchains running on PoW mechanism always have low levels or performance degradation over time. Coming to blockchains running with PoS consensus mechanism, we always face absolute decentralization as a lot of leverage is exerted on the high stake holders (stakes) of the original tokens of the blockchain.
The above issues are what should lead to the development of other consensus mechanisms in particular PoA.
The PoA works more in solving the scalability problems associated with Pow and at the same time solving the problems in absolute decentralization as regards proving of PoS.
Similar to PoS mechanism but more innovative PoA does not exert much influence on Staker but rather users need to operate enough on the blockchain to get good reputation which is more of a fair operation.
Also similar to PoS, the PoA limits the number of miners thereby creating sufficient scalability which in turn increases the performance of the blockchain.
Also, in the PoA mechanism, there is no absolute privacy for validators because apart from gaining reputation, their real identity must be made public.
However, the PoA consensus mechanism performs better than PoW and has a more decentralized operation when compared to PoS.
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