Practical Byzantine Fault Tolerance (PBFT)

Practical Byzantine Fault Tolerance (PBFT) is a replication-based consensus algorithm designed to provide high-throughput, low-overhead fault tolerance in distributed systems, allowing them to function correctly even if up to one-third of the nodes are malicious or fail (Byzantine faults). Developed in 1999 by Miguel Castro and Barbara Liskov, PBFT is a state machine replication protocol that achieves deterministic finality and is widely adopted in permissioned blockchain and distributed ledger technology (DLT) environments.