Random number generator (RNG)
Software that produces random outcomes for casino games; most slots and table games use a certified RNG rather than provably fair seeds.
A random number generator (RNG) produces the results of digital casino games. Most slots and digital table games from third-party providers use RNGs running on the provider's servers.
How RNGs are trusted
RNG fairness is usually supported by independent testing labs that examine the software and statistics, and by regulators who require certified games. Players cannot verify individual results; they rely on the testing, the licence and the provider's reputation.
RNG versus provably fair
Provably fair games let you check each result yourself after the seed is revealed. RNG games do not. Neither approach changes the house edge. Provably fair is stronger for individual bet verification; RNG certification covers games that are not designed for player verification, including most slots.
What to check
- Which games at a casino are provably fair originals and which are third-party RNG games.
- Whether third-party games come from established providers with lab certificates.
- The RTP version the casino has chosen for each slot.