That’s why we need a TRNG (True Random Number Generator), but that requires special hardware. Some high-end microprocessors are equipped with an internal hardware TRNG, but it is, unfortunately ...

A new laser’s chaotic light beam lets the device generate multiple number sequences at once, similar to throwing multiple dice at a time.

Curiously, some popular random-number generators fail even in simulating a coin toss. Over time, they should produce roughly the same number of zeros and ones (heads and tails).