Practical Byzantine Fault Tolerance

Practical Byzantine Fault Tolerance (PBFT) is a consensus algorithm used in distributed systems to achieve agreement among multiple nodes, even when some may fail or act maliciously. Imagine a group of friends trying to decide on a restaurant. PBFT ensures they can still reach a decision even if a few friends are dishonest or absent. It does this by requiring a two-thirds majority agreement among participants, allowing the system to continue functioning and maintaining trust without relying on a central authority. PBFT is particularly useful in blockchain and secure communication systems where reliability is crucial.