Last updated: 28 August 2026
The Aviator crash game by Spribe uses a provably fair commit-reveal algorithm: before each round, the server publishes a hash of a secret server seed, then combines that seed with client seeds and a round identifier to deterministically compute the crash point – meaning the multiplier at which the plane flies away is already fixed before the animation even begins. With a commonly cited RTP of 97%, the outcome is cryptographically committed and verifiable after the round, but not predictable in advance. This guide explains exactly how the algorithm works and what “provably fair” genuinely means.
Key points
- Commit-reveal scheme: the server publishes a hash of its seed before the round, revealing the seed only afterward.
- The crash point is predetermined, computed from the seeds before the animation runs, not decided live.
- SHA-256 verification lets players confirm the pre-round hash matches the revealed seed.
- Commonly cited RTP of 97%, implying a 3% house edge over the long run.
- Verifiable after, not predictable before, because the server seed stays hidden until the round ends.
The provably fair foundation
What “commit-reveal” actually means
Aviator is built on a provably fair commit-reveal scheme, a specific cryptographic approach designed to prove the operator can’t manipulate outcomes after seeing player bets. Before each round begins, the operator commits to a hidden random server seed by publishing only its hash – a one-way cryptographic fingerprint of the seed, not the seed itself.
Because a cryptographic hash is a one-way function, publishing the hash proves the server has already decided on a specific seed without revealing what that seed is. This is the crucial commitment step: the operator is locked into a particular seed before any bets are placed, but nobody can work backward from the hash to discover the seed in advance.
The reveal and verification
After the round ends, the operator reveals the actual server seed. Anyone can then check this revealed seed against the hash that was published before the round: if hashing the revealed seed produces the same value that was committed to earlier, it proves the operator did not change the seed after seeing bets. This after-the-fact verification is what makes the system “provably” fair rather than merely claimed to be fair.
How the crash point is calculated
Combining the seeds
The crash multiplier isn’t chosen manually for each round. Instead, it’s derived deterministically from a cryptographic hash of combined inputs: the secret server seed, one or more client seeds contributed from the player side, and a nonce or round identifier that distinguishes one round from the next. Some descriptions of Aviator specify the server seed plus three client seeds with SHA-256 used in the verification chain.
Because the crash point is computed from these committed inputs, the result is fully determined the moment the inputs are set. The multiplier at which the plane flies away is a fixed consequence of the seeds, not a live random decision made as the round unfolds.
From hash output to multiplier
The exact mathematical mapping converts the cryptographic hash output into a decimal or fraction that maps to a specific crash multiplier, following Spribe’s published provably fair design. The technical detail varies slightly between summaries – some describe a simplified seed-plus-nonce hash-to-multiplier formula – but all descriptions agree on the essential point: the result is fixed once the committed inputs are established, before the round’s visible animation ever runs.
The multiplier curve is just animation
The rising curve versus the predetermined result
During a round, the visible multiplier rises smoothly over time as the plane climbs, creating the tension the game is built around. But this rising curve is purely display and animation – the actual crash point was already calculated by the hash-based formula before the animation began.
This is the single most important thing to understand about how Aviator works: the curve isn’t being randomised live as it rises, and the plane isn’t “deciding” when to fly away in real time. The round has a fixed terminal crash value computed in advance, and the smooth animation is simply the game revealing that predetermined result over a few seconds of visual buildup.
Why this matters for how you think about the game
Understanding that the crash point is predetermined dispels a common misconception that the multiplier might be reacting to how many players have cashed out or how much is at stake in real time. It isn’t – the outcome was locked in cryptographically before the round started, independent of any live activity during the animation.
The RTP and house edge
97% over the long run
Aviator’s commonly cited default RTP is 97%, which implies a house edge of 3% over the long run. This is a competitive RTP compared to many casino games, reflecting a relatively low house edge – though as always, RTP is a long-run statistical property calculated over an enormous number of rounds, not a guarantee or prediction for any single round or session.
The provably fair mechanism and the RTP are separate concepts worth keeping distinct: the provably fair system guarantees the operator followed the committed algorithm honestly, while the RTP describes the long-run mathematical return that algorithm is designed to produce. Provably fair doesn’t mean “better odds” – it means “verifiably honest odds.”
Is it random or predictable?
Not predictable in advance
Before a round, the crash point is not predictable in any practical sense, because the server seed is hidden and only its hash is published. Since a cryptographic hash is designed to be one-way, there’s no feasible way to work backward from the published hash to determine the seed, and therefore no way to know the crash point before the round unless the hidden seed were somehow compromised.
Verifiable after the fact
After a round, the outcome becomes fully verifiable: the revealed seed and the previously published hash let anyone recompute the crash point and confirm the operator followed the committed algorithm exactly. So the outcome is random-looking and commitment-secured, but crucially not user-predictable in advance – which is precisely the property that makes any claimed “prediction system” or “algorithm hack” for such games fundamentally unable to work as advertised.
Responsible gambling
Provably fair doesn’t change the risk
It’s worth being clear that a provably fair mechanism verifies honesty, but does nothing to reduce the underlying gambling risk. The 3% house edge is real and applies over the long run regardless of the cryptographic verification, and no prediction system can beat an outcome that’s cryptographically fixed and unpredictable in advance. This guide is for informational purposes only and does not constitute gambling advice. For adults 18 and over only, where legally permitted.
Getting help
If gambling has stopped being controlled entertainment, seeking support from a qualified counsellor or support service is a reasonable step.
Conclusion
Aviator’s algorithm is a genuine provably fair commit-reveal system: the crash point is cryptographically predetermined from committed seeds, unpredictable before the round, and fully verifiable after it. Understanding that the rising curve is just animation over an already-fixed result is the key insight – and it explains why no “prediction” system can ever work against a cryptographically committed outcome.
Frequently asked questions
How does the Aviator game algorithm work?
It uses a provably fair commit-reveal scheme: the server publishes a hash of a secret seed before the round, then combines that seed with client seeds and a round identifier to deterministically compute the crash point.
Is the Aviator crash point predetermined?
Yes. The crash multiplier is computed from the committed seeds before the animation runs. The rising curve you see is just display, not a live random decision.
What is provably fair in Aviator?
A system where the operator commits to a hidden seed via its hash before the round, then reveals it afterward so anyone can verify the outcome wasn’t manipulated after bets were placed.
What is the RTP of Aviator?
Commonly cited at 97%, implying a 3% house edge over the long run. This is a long-run statistical property, not a guarantee for any single round.
Can you predict the Aviator crash point?
No. The server seed is hidden and only its hash is published before the round, and cryptographic hashes are one-way, so the crash point can’t be determined in advance.
Do Aviator prediction systems or hacks work?
No. Since the outcome is cryptographically committed and unpredictable before the round, no prediction system can genuinely forecast it, regardless of what such tools claim.
Written by Priya Anand, contributor at Shattered covering provably fair systems and game mechanics across South Asian markets. Our coverage draws on published provably fair documentation and independent verification. Shattered’s coverage is independent; we do not accept payment for favourable coverage of any operator.
