What Consensus Mechanism Is Typically Used in a Permissioned Blockchain?

Permissioned blockchains commonly use highly efficient, low-latency consensus mechanisms like Proof-of-Authority (PoA) or variants of Practical Byzantine Fault Tolerance (pBFT). PoA relies on pre-approved, trusted nodes to validate transactions, maximizing speed and efficiency. pBFT allows the network to reach consensus even if a minority of nodes are malicious, provided the number of malicious nodes is known.

These mechanisms are chosen because the network participants are already known and vetted, prioritizing throughput over open participation.