On: Myths about /dev/urandom

[rlpb]

I'm not sure what the author's intention was when he said that, but I think there would be a problem if you cloned, and then returned to a previous save point shared with other clones.

[Tomte → rlpb]

That's one thing.

The other one is that after rewinding you've got the identical internal state of the CSPRNG.

So you're possibly reusing the same random numbers (or closely related ones) as before.

Of course, after a short while the rewinded VM diverges. It's another flavor of the cold boot case, really.

[danielweber → Tomte]

If I rewind a VM, and it chooses the exact same random numbers this time, I consider that everything acting correctly.