Practical Byzantine Fault Tolerance is really a consensus algorithm introduced in the late 90s by Barbara Liskov and Miguel Castro. pBFT was designed to work competently in asynchronous(no higher sure on when the reaction into the ask for will be received) units. It is optimized for low overhead time. https://financefeeds.com/isam-securities-announces-new-hong-kong-office-to-support-apac-growth/