The Heisenberg Uncertainty Principle

In order to develop a key that's truly random, there are devices called quantum random number generators. QRNGs work the opposite of a quantum computer: They're actually there just to dissolve. And when they do, then there's a random output which is truly random. In fact, it's the most random thing in the universe. No way to predict it, because you remember that whole thing about superposition and wave particle duality? I got a joke for you too, so you joke.