Provably fair is a cryptographic system that allows players to independently verify that a game outcome was not manipulated by the casino. Using hash functions and seed values, players can mathematically confirm that results were determined before they placed their bet. This technology is primarily used by crypto casinos.
Traditional online casinos rely on third-party audits to certify fairness, but provably fair games go further by giving players the tools to verify every single outcome themselves. The system works by combining a server seed (committed before the bet via a hash) with a client seed (chosen or modified by the player) and a nonce (incrementing counter). After a bet resolves, the casino reveals the server seed so the player can recalculate the result and confirm it matches. If the casino tried to change the outcome, the hash would not match. This level of transparency is unique to crypto casinos and has become a major selling point for platforms like Stake.us. Games like crash, dice, plinko, and mines are the most commonly provably fair game types.
After a crash game round ends at 2.43x, the casino reveals the server seed. You combine it with your client seed and the nonce to independently calculate the crash point — it matches 2.43x, confirming the result was not rigged.
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