What "provably fair" actually means
Provably fair is a bit of cryptography that lets you confirm a game round was not fiddled with. Rather than taking the casino's word for it, you can run the numbers yourself and see for certain. It covers BC Game's own Originals: Crash, Limbo, Dice, Hilo, Keno and the rest of the in-house line-up.
The three ingredients
| Element | Who controls it | Purpose |
|---|---|---|
| Server seed | BC Game | Hidden as a hash before the round, revealed after. |
| Client seed | You | You set this one, which keeps the result out of the casino's sole control. |
| Nonce | Automatic | A counter that increases each bet, making every round unique. |
How a round is verified
- Before the round, BC Game shows a hashed server seed. You cannot read it, but it is locked in.
- You set or accept a client seed.
- You place the bet; the outcome is calculated from the seeds and nonce.
- After the round, reveal the server seed and re-hash it. It has to match the hash you were shown earlier.
- Re-run the published algorithm with all three values to confirm the exact result.
When the revealed seed matches that earlier hash and the algorithm spits out the same result you saw, the round was clean. If the two ever failed to line up, you would know instantly that something had been changed. That is exactly what the system is designed to catch.
Where it stops
Being able to prove a round was honest is genuinely useful, but do not read too much into it. It says nothing about your chances of winning. The house edge and the published RTP are unchanged, and there is no such thing as a result that is "due". Over a long enough run the RTP wins out, which is why how you manage your bankroll matters far more than any hunch.
For more, see our responsible gambling guide and the strategy section on the home page.