PBFT (Practical Byzantine Fault Tolerance) is a consensus algorithm that is used to achieve fault-tolerance in distributed systems. It is based on a consensus protocol that allows a network of replicas to agree on a single value in the presence of malicious actors.
PBFT stands for Practical Byzantine Fault Tolerance, and it is a consensus algorithm used in distributed systems. It is designed to ensure that a distributed system can continue to operate even if some of its components fail or act maliciously.
PBFT works by having each node in the system maintain a copy of the same data, and then using a consensus algorithm to ensure that all nodes agree on the same version of the data. This is done by having each node send a message to all other nodes in the system, and then having each node vote on the data. If a majority of the nodes agree on the data, then it is accepted as the correct version.
PBFT is designed to be resilient to malicious actors, as it requires a majority of the nodes to agree on the data before it is accepted. This means that even if some nodes are malicious, the system can still reach consensus.
PBFT is also designed to be efficient, as it only requires a single round of communication between the nodes. This makes it suitable for use in distributed systems that need to reach consensus quickly.
PBFT is used in many distributed systems, including blockchain networks. It is also used in distributed databases, distributed file systems, and distributed storage systems. PBFT is a popular consensus algorithm due to its resilience to malicious actors and its efficiency.