A Review on Consensus Algorithms in Blockchain

Block chain technology is a decentralized data storage structure based on a chain of data blocks that are related to each other. Block chain saves new blocks in the ledger without trusting intermediaries through a competitive or voting mechanism. Due to the chain structure or the graph between each block with its previous blocks, it is impossible to change blocking data. Block chain architecture builds trust in a peer-to-peer network, without intermediary, through nodes within the network and according to different algorithms. In this paper, we intend to explain the mechanism of each proof-based consensus algorithm ,vote-base algorithm and the directional non-circle-based graph.