Cryptographic verification

Provably Fair, Explained Simply

Provably Fair is a cryptographic method that lets you check a completed casino round was not manipulated. Aviator uses it round by round. Here is how it works — and, just as importantly, what it does not promise.

Diagram of the Provably Fair flow: server seed committed with SHA-256, combined with client seeds, hashed with SHA-512 into a verifiable result
Commitment before the round, verification after it.

The Flow, Step by Step

  1. The operator generates a server seed — a random value that will help determine the round result.
  2. A SHA-256 hash of that seed is published before the round. The hash acts as a sealed envelope: it commits the operator to the seed without revealing it.
  3. Players contribute client seeds — values from the players' side that the operator cannot control.
  4. Server and client seeds are combined and hashed with SHA-512, producing the round result.
  5. After the round, the server seed is revealed. Anyone can hash it and confirm it matches the pre-published commitment, then recompute the result.

What You Can and Cannot Verify

Provably Fair can
  • Confirm a completed round was not altered after the fact
  • Prove the operator committed to the seed before take-off
  • Detect tampering with published seed data
Provably Fair cannot
  • Predict the next multiplier — commitments reveal nothing in advance
  • Remove the house edge or improve your odds
  • Verify anything about deposits, withdrawals or the operator's business conduct

Why This Matters for Trust

Game integrity and operator trustworthiness are separate questions. Provably Fair addresses the first: it shows the round result was fair. It says nothing about whether a platform pays withdrawals or holds a valid licence — that side of due diligence is covered in our Aviator Ethiopia review and safe-site checklist.

SPRIBE documents its Provably Fair implementation publicly, and the genuine Aviator interface exposes round verification data to players. If a platform claims to offer Aviator but hides these controls, treat that as a red flag.

Frequently Asked Questions

Does Provably Fair mean I can predict the next round?

No. The published SHA-256 hash commits the operator to a seed without revealing it, so the upcoming result stays unknowable until after the round.

Can I verify old rounds?

Yes — the genuine SPRIBE interface exposes the seed and hash data of completed rounds so results can be recomputed and checked.

Is a Provably Fair game automatically safe to play?

Not by itself. Provably Fair covers round integrity only; licensing, withdrawals and account security depend on the operator and must be checked separately.