거부권을 이용한 PBFT 합의 알고리즘의 개선방식

Since Bitcoin was introduced to the world, blockchain has been noted for foundation technology in various fields. To create a block in a blockchain, A process is needed in which majority nodes agreement on the contents of the block. This is called consensus algorithm. There are a lot of consensus algorithms such as PoW (Proof of Work), PoS (Proof of Stake) and PBFT (Practical Byzantine Fault Tolerance). Each consensus algorithm has its own limitations like finality uncertainty or performance and so on. Because of block finality, recently a variety of PBFT-based consensus algorithms are appreared. In this paper we suggests that the PBFT-based consensus algorithm improved by veto power.