Explore a 17-minute IEEE conference talk on Sync HotStuff, a simple and practical synchronous state machine replication protocol for Byzantine Fault Tolerance (BFT). Delve into the protocol's ability to achieve consensus with a 2∆ latency in steady state, its safety guarantees in weaker synchronous models, and its optimistic responsiveness. Learn about Sync HotStuff's two-phase leader-based structure, its performance when tolerating a single fault, and how it compares to partially synchronous solutions. Examine the protocol's data structure, quorum certificates, and both steady state and view change protocols. Gain insights into the motivations behind BFT state machine replication, its definition, and how Sync HotStuff fits into the landscape of existing consensus solutions.