Topic ยท 9 guides
Provably fair guides
Provably fair means you can check a result yourself. Start with the overview, then go into seeds, hashing, RNGs and a calculator you can run on a finished round.
Start here
Provably fair casino guide: how to check every result
A provably fair casino publishes a cryptographic commitment to each game's random seed before you bet, then reveals the seed after the game. Because anyone can recompute the result from the revealed seed and confirm it matches the earlier commitment, you do not have to trust the operator's word that the result was not changed.
How fairness works
Provably fair games: how each type is verified
Provably fair games explained: how coinflip, jackpot, roulette, dice, crash and cases are verified, what to check on each, and a worked PVPspinArena example.
Commit reveal scheme: the idea behind provably fair
What a commit reveal scheme is, why hiding and binding matter, how hash commitments work, and how games, auctions and blockchains use them to prove fairness.
Server seed vs client seed: how provably fair seeds work
Server seeds, client seeds and nonces explained: what a client seed generator does, why seeds are hashed first, and how PvP games commit to a seed instead.
HMAC-SHA256 explained: how it powers provably fair games
What HMAC-SHA256 is, how it differs from a plain SHA-256 hash, and how provably fair games use it with a committed server seed to make results checkable.
RNG versus hashes
RNG casino vs provably fair: which can you trust?
How an RNG casino generates results, how certified RNG audits work, how provably fair differs, and which model lets you verify each bet yourself.
How random number generators work in casino games
How random number generators work in casinos: PRNG versus hardware RNG, seeding, and how provably fair hashes give you a check the RNG box does not.
Check a result
Provably fair calculator: how to check any game result
Use a provably fair calculator to check a game result: verify the seed hash, recompute HMAC-SHA256 and map it to the outcome, with worked examples.
Provably fair roulette: how every spin is verified
How provably fair roulette works: seed commitments, HMAC-SHA256, rejection sampling for an unbiased wheel, and how to verify any spin step by step yourself.