Guess what: none of this matters, because RdRand is only one source of entropy among many. For example, another source is the timing of TCP packets coming into

Guess what: none of this matters, because RdRand is only one source of entropy among many. For example, another source is the timing of TCP packets coming into the machine. The NSA can't predict that; nobody can. It's the butterfly effect in action. RdRand is kind of the "crocodiles in the sewer" of HN. A tall tale that somehow keeps getting passed around. Guys, they're just generating random bits from thermal noise, that's it! There's a million other more effective backdoors they could insert into the motherboard, CPU, or firmware.