An alternative solution to avoid relying on proof of work (POW) mining is to use a replacement consensus mechanism known as POA, in which we trust a set of known validators (authorities) to accept transactions. In other words, POA validators are staking their identity and voluntarily disclosing who they are in exchange for the right to validate the blocks. Unlike POW, POA is a centralized mechanism that delivers comparatively fast transactions, thus POA deployment is used by private (enterprise) and some public testing networks (for example, the popular Kovan and Rinkeby test networks).
Both main Ethereum clients, Parity and Geth, support POA.
To set up a private chain with Geth and POA, you will need to reiterate the same ...
