The encrypted problems required for a blockchain calculation can be solved by a hash, which is a mathematical formula. The process of using this hash is known as mining. Hashes are used by several blockchain system components. To ensure that nothing has been altered as new blocks are added, each block first contains the hash of the block header of the previous block. Additionally, proof-of-work (PoW) cryptocurrency mining involves hashing a set of randomly generated numbers to produce a certain hashed value that has a string of leading zeroes. Since this arbitrary function consumes a lot of resources, it would be challenging for a malicious actor to take over the network.