RNG & Fairness
How games are randomized and what "provably fair" means.
When you spin a slot machine or play virtual blackjack, how do you know the results are truly random? Understanding Random Number Generators (RNG) and fairness certification helps you trust—or distrust—the games you play.
What Is an RNG?
A Random Number Generator is software that produces unpredictable numbers at a rate of thousands per second. Each number corresponds to a game outcome:
- Which symbols appear on slot reels
- Which cards are dealt in video poker
- Where the virtual roulette ball lands
Good to Know
How RNG Prevents Manipulation
Reputable platforms implement several safeguards:
Continuous Generation
The RNG runs constantly, not just when you press spin. The exact millisecond you play determines your result.
No Pattern Recognition
Past results don't influence future outcomes. Each spin/hand/roll is independent.
Third-Party Testing
Independent labs test RNG algorithms to verify randomness and advertised RTP.
Third-Party Testing Labs
Look for certifications from these respected testing agencies:
- eCOGRA – Independent testing and player protection
- iTech Labs – RNG testing and game certification
- GLI (Gaming Laboratories International) – Industry standard testing
- BMM Testlabs – Global gaming testing lab
Strategy Insight
What Is "Provably Fair"?
Provably fair is a technology used mainly by crypto casinos that lets you verify each game result was fair:
- Before you play, the server generates a secret "seed" and shows you a cryptographic hash
- You can optionally add your own random seed
- After the game, the server reveals its seed
- You can mathematically verify the hash matches and results weren't changed
Pro Tip
Can Online Games Be Rigged?
At licensed, regulated casinos: extremely unlikely.
Regulators require:
- Regular RNG audits
- Actual payout percentages matching advertised RTP
- Hefty fines and license revocation for violations
Warning
Live Dealer: Physical RNG
Live dealer games use actual cards, wheels, and dice—not software RNG:
- Real shuffle machines or hand-shuffled cards
- Physical roulette wheels spun by dealers
- Multiple camera angles prevent dealer cheating
This provides additional trust for players skeptical of software randomness.
Key Takeaways
- 1RNGs produce thousands of random numbers per second for game outcomes
- 2Reputable casinos use third-party tested and certified RNG systems
- 3Provably fair lets you mathematically verify game results weren't manipulated
- 4Licensed casinos face severe penalties for rigging—it's not worth the risk
- 5Live dealer games use physical randomness instead of software