Hash Commitment

Hash commitment is a cryptographic technique used by crash game operators to prove that a round’s outcome was determined before the round began and was not altered after the fact.

In practice, a hash commitment works like a sealed envelope. Before a crash round starts, the server generates a secret value — typically a random seed — and runs it through a one-way cryptographic hash function (most commonly SHA-256). The resulting hash string is published to the player before the round plays out. Once the round ends, the original seed is revealed. Because SHA-256 is a one-way function, it is computationally impossible to reverse-engineer the seed from the hash alone, meaning the operator cannot have changed the outcome mid-round without producing a different hash entirely.

Players can verify this themselves. After a round concludes, take the revealed seed, run it through the same hash function, and confirm it matches the hash that was committed upfront. If the values match, the outcome was locked in before you placed your bet. This is the foundation of provably fair crash gambling — the hash commitment is what makes third-party verification possible rather than just a marketing claim. Games like Pigaboom implement this system so players can independently audit every round result without relying solely on the operator’s word.

It is worth understanding one practical detail: a hash commitment alone does not guarantee a fair distribution of outcomes — it only guarantees the outcome was not changed after commitment. The underlying algorithm that converts the seed into a crash multiplier also matters. Always check that a game publishes its full verification method, not just the hash, so you can audit the complete chain from seed to result.

See also: Provably Fair Crash Gambling