Roberto Saltini
Abstract
Istanbul Byzantine Fault Tolerance (IBFT) is one of a family of proof-of-authority (PoA) blockchain consensus protocols designed to ensure immediate finality. We partially analyse the correctness of IBFT and show that the protocol does not guarantee Byzantine-fault-tolerant liveness when operating on a partially synchronous network.
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Istanbul Byzantine Fault Tolerance (IBFT) is one of a family of proof-of-authority (PoA) blockchain consensus protocols designed to ensure immediate finality. We partially analyse the correctness of IBFT and show that the protocol does not guarantee Byzantine-fault-tolerant liveness when operating on a partially synchronous network.
Key concepts: Liveness, Byzantine fault tolerance, Correctness, Computer science, Fault tolerance, Quantum Byzantine agreement, Protocol (science), Distributed computing