Re: How can you verify the randomness that's coming from a hardware?

Rolling a dice gives certainly more than 2 bits uncertainty, since 2 bits is one of 4 choices, while the dice is one in 6.

I don't follow. In 4 out of the 6 results, it gives 2 bits (00, 01, 10, 11) while in 2 out of the 6 results, it gives 1 bit (0, 1). Isn't this (4*2 + 2*1)/6 = 10/6 = 1.666 bits in each result on average?

Oh no, no, no, you can't do that! Grin

You can't just split and add probabilities at will.

Aren't both j2002ba2 and BlackHatCoiner right? Yes, a dice [produces 2.58 bits of entropy, but no, you're not using that when writing down dice rolls. If you roll 1, 2, 3 or 4, you treat the dice as if it's a 4-sided dice that produces 2 bits of entropy. And if you roll 5 or 6, you treat the dice as if you flipped a coin. So you end up on 1.66 bits of entropy on average.