Quote from: BlackHatCoiner on Today at 11:23:10 AM

I don't understand much from the texts you've quoted

Then that alone should be enough to convince you that there is more to consider here than just input a string in to SHA256 and being happy that whatever it outputs is secure enough to use as your entropy source

Quote from: BlackHatCoiner on Today at 11:23:10 AM

Numbers derived from a random number are considered pseudo-random, but they're treated as equivalently cryptographically secure.

What you are talking about here is randomness extraction. This is a whole field of study on its own, and is much more complex than simply "Use SHA256".

Quote from: BlackHatCoiner on Today at 11:23:10 AM

Whether you represent the seed with base 2, base 6, base 10, base 16 etc., it doesn't have a difference

Except that you've now introduced a modulo bias.

But damn it Jim! I'm a doctor, not a cryptographer! As I say, I do not know enough about this topic to give you a full technical explanation, and that alone is enough for me to know that I shouldn't be using such methods as my own ad hoc entropy derivation scheme. Maybe someone more knowledgeable can come along and explain that just taking a SHA256 of some dice rolls is actually perfectly safe, but I doubt it, and until then I'm not willing to gamble the security of my wallets and my coins on an untested method I know I don't fully understand.