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Why RNG certification is important
What is RNG and why is it critical
RNG (Random Number Generator) - the engine of any game with a chance: slots, roulette, card simulators, crash games, jackpots. If the RNG is biased or predictable, the main thing suffers - honesty. Certification confirms that:- numbers are statistically unpredictable;
- the distributions correspond to the game's mathematics;
- implementation is robust to errors, manipulation, and version "drift."
Three reasons to certify RNG
1. Trust and reputation. Content providers, aggregators, banks and players perceive the "silver nameplate" of an independent laboratory as a minimum standard of integrity.
2. Legal compliance. Most respected jurisdictions (Europe, UK, Malta, Gibraltar/Haut-Maine, new Caribbean regimes, etc.) require RNG/mathematics certification and version control.
3. Operational resilience. Certification "catches" bugs of early stages: rounding errors, incorrect display of symbol weights, collisions in sitting, regression during updates.
What exactly laboratories check
Randomness statistics: test batteries (for example, NIST SP 800-22, Dieharder/Crush, etc.), autocorrelations, spectral tests, uniformity and independence of sequences.
Sitting and condition: uniqueness and unpredictability of seed, protection against repetitions during restarts, period length, absence of "pop-up" initial patterns.
Range mapping - Correctly project a uniform sequence onto discrete reel/table outputs without frequency offset.
Game mathematics: compliance with the declared payment tables, RTP and volatility, correct implementation of features (sticky wilds, re-spin, bonus buy, free spins, etc.).
Integration and performance: stability under load, no RNG freezes, correct logging.
Security and integrity: version control and assembly hashes, artifact signing, tampering protection in runtime.
How is certification: by steps
1. Preparation of artifacts. RNG code/library, algorithm description, sitting scheme, compiler/SDK version, build hashes, game mathematics (RTP, drop tables), test log dumps.
2. RNG Stattests. Generation of long sequences → battery runs → pass/threshold report.
3. Verification of mathematics. Simulation of millions/billions of rounds (Monte Carlo simulations) and analytical calculations: RTP, variance, hit-frequency, bonus/jackpot frequencies.
4. Integration audit. Checking range mapping, rounding rules, behavioral cases (re-spins, transaction rollbacks, session recovery).
5. Signatures and version control. Fixing hashes of executable modules and asset packages; Issue a certificate listing the allowed configurations.
6. Report and recommendations. Classification of comments (MAJOR/MINOR/OBS), remediation sheet. After corrections - confirmation (attestation).
When to recertify
Any change in math (RTP/weights, bonus probability, jackpot logic).
Updating the RNG kernel (algorithm, seed management, transition to H/W RNG).
Environment migration (engine, compiler, crypto libraries, platform/OS).
Content updates that affect the frequency of drops (new characters, reels, pay-ways).
Fixes bugs affecting the calculation of outcomes/payments.
What will happen without certification: risks
Legal: refusal of license/listing, fines, stop list from the regulator.
Financial: disruptions of releases from aggregators, block of payments, chargebacks and mass complaints.
Technical: "wedge" distributions, predictable seeds, bugs in rounds → RTP skew.
Reputational: loss of confidence of players and partners, an increase in outflow and negative PR.
RNG: pseudorandom vs hardware
PRNG (pseudo-random): fast, repeated at the same seed; suitable for most games with proper seating/pre-protection.
HRNG/TRNG (hardware/true random): give entropy from hardware sources. Often used for sid or in hybrid schemes.
The golden rule: predictability seed and "state leakage" are more dangerous than choosing the algorithm itself - pay maximum attention to their protection.
Post-release control: what to monitor
Actual RTP by slice (day/week/month, game/version/operator/jurisdiction).
Frequency of bonuses and large winnings, distribution by bets/sessions.
Anomalies (RTP jumps, "silence" of bonuses, bursts of rare outcomes).
Incidents and rollbacks, correctness of repeated calculations in case of failures.
Signatures/hashes of builds on sale, comparison with those allowed in the certificate.
Studio/Platform Checklist Before Sending to Lab
- RNG documentation: algorithm, seed management, period, anti-predictability.
- Description of range mapping and rounding rules.
- Mathematical model of the game + target RTP/volatility + calculations/simulations.
- Scripts for generating long sequences and examples of logs.
- Build pipeline: compiler/SDK versions, artifact hashes, reproducible builds.
- Change-management policy and release notes (approvals).
- Telemetry and RTP/bonus reporting for post-monitoring.
Operator Check List (B2C)
- In contracts with providers, the required RNG/game certificate and recertification mode are spelled out.
- RTP and references/certificates are published in the showcase where permitted by the jurisdiction.
- Included alerts on RTP/bonus anomalies and "jackpot silence."
- Immutable round/payout logs are stored; retro audit is configured.
- Any content update passes release gate with certificate/hash verification.
Common mistakes and how to avoid them
Reseeding in time/microseconds. Solution: combined sides, systemic sources of entropy, stretching through KDF.
Invalid range projection. Solution: unbiased mapping, deviation of "extra" values, provable tests.
Hidden rounding and overflows. Solution: explicit types, unit tests at boundaries, maths reviews.
Hot edits in prod. Solution: no algorithm/scale changes outside the certified assembly; signatures and integrity control.
Lack of RTP monitoring. Solution: dashboards and weekly checks with theory + alerts on corridors.
FAQ
RNG "gray" - if the game is fair in feeling, is that ok?
No, it isn't. Honesty is not a feeling, but a provable property through tests, certification and version control.
Certification once and for all?
No, it isn't. Any editing of the mathematics/kernel/environment → revision and, as a rule, recertification.
Is HRNG better than PRNG?
Not always. Key - unpredictable seed, correct mapping and integrity control. HRNG is useful as a source of entropy, but implementation discipline is more important.
Is it possible to "prove" RTP at a short distance?
No, it isn't. RTP is a theoretical indicator on a long series. Therefore, post-monitoring and corridors with alerts are needed.
RNG certification is not a formality, but a foundation of trust in your product. It reduces legal and operational risks, catches hidden defects and makes your math transparent to regulators, partners and players. Build the process so that honesty is not an "add-on," but part of the culture: documented RNG, tight version control, transparent RTP and constant monitoring. Then the certificate will become not a "piece of paper for the license," but a competitive advantage.