KENO PROVABLY FAIR VERIFIER
Ten balls out of forty, allegedly random — here is where you make the casino show its work. From a revealed seed pair and nonce this page regenerates the complete Keno draw so you can hold it against the grid you were paid on.
The ten numbers fall out of the float stream of HMAC-SHA256(server seed, "clientSeed:nonce:cursor"), drawn without replacement. Stake and Shuffle rounds reproduce digit-for-digit; other operators’ schemes are catalogued in the support matrix.
Draw-By-Draw Log
Keno feels like a lottery, and lotteries have a long, well-documented history of being fixed — which is exactly why crypto Keno’s design matters. Here the drawing machine is an HMAC you can operate yourself: the ten hits are a deterministic function of a committed server seed, your client seed and the bet’s nonce. This page is that machine, outside the casino’s control.
HOW KENO DRAWS ARE CALCULATED
Keno draws 10 distinct numbers from a pool of 1–40 using the same shrinking-pool method as Mines:
- Generate one float per draw from the HMAC stream.
- Start with a pool of [1..40]. For each of 10 draws,
idx = floor(float × remaining-pool-size), take that number, remove it from the pool.
Calibration round: the reference seeds some server seed / some client seed at nonce 1 pull the ten numbers 7, 12, 14, 19, 22, 24, 29, 31, 33, 37 (shown sorted, as casinos display them).
HOW OFTEN SHOULD YOUR PICKS OVERLAP THE DRAW?
Keno disappointment is mostly mis-set expectations, and the hypergeometric distribution sets them straight. Mark 10 numbers on the 40-spot card and the draw of 10 overlaps your picks 2.5 times on average — two or three hits is the normal outcome, not a cold streak. Blanking entirely happens about 3.5% of the time (roughly one card in 28), so the occasional zero-hit round is expected behaviour, not evidence of a hostile draw. And sweeping all ten? One card in 847,660,528 — the number of ways to choose 10 from 40. If your hit counts over a session wander around 2–3, the draw is behaving exactly as an honest one must.
WHAT RE-DRAWING A ROUND DEMONSTRATES
A regenerated draw closes the one gap statistics cannot: it ties your specific round to data committed before you bet. The ten numbers this page produces come from a server seed whose hash the casino displayed in advance, mixed with a client seed only you controlled — so if they match the casino’s grid, that draw could not have been picked to dodge your card. Run the numbers on payout value separately with the Keno calculator (paytables differ far more between casinos than the draws do), and see crypto Keno odds for how the math compares across sites.
Related Resources
Play Keno: Crypto Keno Odds
Strategy: Lowest House-Edge Games
Calculate the odds: Keno Calculator · Plinko Calculator · Roulette Calculator
Where the draw is always auditable: fairness-first casino rankings