Recent Results in DAG BFT

Abstract

Traditional Byzantine fault tolerant (BFT) state machine replication (SMR) protocols have a reputation of having poor performance despite decades of work in optimizing these protocols. Recently, a new family of protocols,
DAG BFT, has been shown to have much higher throughput than traditional BFT protocols despite having higher communication complexity. This has attracted a lot of interest in improving DAG BFT protocols. This brief survey gives background on the foundational DAG BFT protocols and summarizes the techniques of state-of-the-art results. Finally, it concludes by highlighting avenues for future work.