Practical Byzantine Fault Tolerance (PBFT) is a consensus algorithm used in distributed systems to achieve fault tolerance in the presence of Byzantine faults, which can include nodes failing in arbitrary ways such as sending conflicting information to different nodes. PBFT ensures that a distributed system can reach a consensus on the state of the system even if some nodes are faulty or malicious.
In PBFT, nodes in the network communicate with each other through a series of rounds to agree on the order of transactions. The algorithm requires a two-thirds majority of correctly functioning nodes to reach a decision, ensuring that the system remains consistent even if some nodes are faulty or compromised.
Overall, PBFT is designed to provide a high level of security and fault tolerance in distributed systems, making it a popular choice for applications where reliability and consistency are crucial.
