Provably fair explained: how crypto casino games prove they are honest
Von WbetHub Engineering1 Min. Lesezeitcryptofairnessengineering
Server seeds, client seeds, nonces and HMAC — what provably fair actually means, how players verify a round, and why it matters for crypto casinos.
The problem
Players of crypto casinos want cryptographic proof that a result was not altered after the bet was placed.
The scheme
- The operator generates a server seed and publishes its hash.
- The player supplies (or auto-generates) a client seed.
- Each round uses HMAC-SHA256(serverSeed, clientSeed:nonce) to derive the outcome.
- When the server seed rotates, the old one is revealed so every past round can be re-computed.
WbetHub Originals ship with a public verifier page and an open specification.