# Proof-of-Work (PoW)

Proof of work (PoW) is the first consensus algorithm created in the Blockchain network, used to confirm transactions and produce new blocks in the chain. The PoW algorithm is an essential part of the cryptocurrency mining process. This is a basic consensus model of Bitcoin and Bitcoin is the cryptocurrency that pioneered the use of PoW. Accordingly, it was designed by Satoshi Nakamoto himself. PoW requires the owners of computers in the network to solve a complex math problem to add a block (block) to the chain. However, the answer to the math Block validators Block validators in PoS refer to full nodes that verify that the blocks generated by the witness follow the consensus rules. Any user can run the block validator and verify the network. There is no incentive to be a block validator. PoW can ensure the safety of the entire network. This is the main purpose of why many cryptocurrencies use PoW. Suppose multiple nodes are competing to determine the resolution of the problem. In that case, the computational power required will become so high that the chain will become unattainable for one or even a small group of hackers.

* Solving the Byzantine common problem in an open network where miners can create arbitrary identities
* Detect spammers
