Review on Qtum by Authes max

For consortium blockchains, the consensus algorithm is usually called PoA (Proof of Authority). Instead of solving a difficult mathematical problem in PoW or holding a large amount of cryptocurrencies in PoS, in PoA, a list of authorized block miners is used to determine which nodes are allowed to create new blocks. The chain has to be signed by the majority of miners, then it becomes a permanent record. It is more efficient and secure since the miners are fewer and more reliable.