  SBFT is a state of the art Byzantine fault tolerant permissioned blockchain
system that addresses the challenges of scalability, decentralization and
world-scale geo-replication. SBFTis optimized for decentralization and can
easily handle more than 200 active replicas in a real world-scale deployment.
We evaluate \sysname in a world-scale geo-replicated deployment with 209
replicas withstanding f=64 Byzantine failures. We provide experiments that show
how the different algorithmic ingredients of \sysname increase its performance
and scalability. The results show that SBFT simultaneously provides almost 2x
better throughput and about 1.5x better latency relative to a highly optimized
system that implements the PBFT protocol. To achieve this performance
improvement, SBFT uses a combination of four ingredients: using collectors and
threshold signatures to reduce communication to linear, using an optimistic
fast path, reducing client communication and utilizing redundant servers for
the fast path.
