Heartbleed should bleed X.509 to death
Rather than all the engineers and tech-minded people here naysay the idea into oblivion, I think it's worthwhile that we encourage designers to take an earnest stab at this problem.The complaints here are basically "w.o.t. is not usable", but that's basically what the author said. He therefore also indicated this is as much a design problem as anything else. That's a useful insight we shouldn't dismiss, at least not until some thoughtful, imaginative designers have actually taken a crack at it.