Cryptographic randomness

Cryptographic randomness means outputs that are hard to predict and hard to manipulate without detection. Hash functions like SHA-256 turn arbitrary inputs into fixed-size digests with avalanche behavior.

Avalanche effect

Change one bit of input and the hash looks completely different. That makes silent parameter tweaking impractical once hashes are published.

In EntropyDraw

We hash the entropy image, then hash the combination of seed material, range, time and description. The final number comes from that digest via rejection sampling. Cryptography turns transparency into math.