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 effectively in asynchronous(no higher certain on when the response on the request will be obtained) devices. It is actually optimized for small overhead time. https://financefeeds.com/new-york-authorities-disrupt-copyright-scam-targeting-russian-speaking-residents/