Provably Fair
At Last One Standing, every outcome is generated by a hardware-seeded Mersenne Twister and committed before any player makes a prediction. Every round is independently verifiable.
How Our RNG Works
Our system uses a two-layer architecture: a GKM (Gaming Key Module) hardware device provides true random entropy to seed a Mersenne Twister (MT19937), producing statistically uniform outcomes that neither the platform nor any player can predict or manipulate.
Hardware Entropy (GKM)
At the start of each round, a GKM hardware module generates true random bits from physical noise — no software entropy source is used. These bits seed the Mersenne Twister for that round.
Pre-Round SHA-256 Commitment
The MT19937 seed is hashed with SHA-256 and published before predictions open. This commits the platform to a specific outcome before any player input is accepted, making manipulation impossible.
MT19937 Outcome Generation
The Mersenne Twister (MT19937) generates the round result from the committed hardware seed. Given the seed and round number, the output is fully deterministic and reproducible by any party with a standard MT19937 implementation.
Post-Round Disclosure
After the round closes, the full GKM seed and MT19937 state are published. Anyone can run MT19937 locally with these values to confirm the result exactly matches the pre-round SHA-256 commitment.
Security & Integrity
Full Transparency
We publish everything needed to independently verify every round:
- Complete round history with GKM seeds, MT states, and SHA-256 hashes available for download
- Deterministic replay: any standard MT19937 implementation reproduces the exact outcome given the disclosed seed
- SHA-256 hash of the MT seed published before each round — the platform cannot change the outcome after this point
- Per-round seed rotation ensures a fresh hardware entropy sample for every round
Designed for Independent Certification
Our RNG architecture is designed so the algorithm can be tested entirely in isolation. A certification laboratory can substitute a known deterministic seed in place of the live hardware module, then verify that the MT19937 output matches the expected statistical distribution — no access to production infrastructure is required.
- Isolation-testable: the hardware module interface accepts a known seed for lab verification without any other system access
- Deterministic replay: seed MT19937 with any disclosed value and reproduce the exact sequence of outcomes
- The GKM is abstracted behind a testable interface — swap in a fixed input to validate the algorithm independently
Verify Any Round
Each round's SHA-256 commitment is published before predictions open. After the round ends the raw seed is disclosed. Enter a Round ID below to independently confirm the outcome was not manipulated.
Enter a Round ID above to verify any completed round
Our Commitment
We are committed to verifiable fairness. If you have questions about any round, our support team will provide the full cryptographic audit trail — including the GKM seed, MT state, and SHA-256 commitment — so you can verify the result yourself.
Read our FAQ