Provably Fair vs RNG Certification: What’s the Real Difference?

When players talk about “fairness” in online casinos, they’re usually referring to one of two systems: either RNG certification or provably fair gaming . On the surface, both of these systems are designed to guarantee random outcomes, but if you look into the complexities of them – under the hood, so to speak – they work very differently from one another, and the levels of transparency are actually nowhere near the same.

It may not sound important, but understanding this difference is really important, especially if you’re choosing between traditional online casinos and newer crypto-focused platforms. Many modern casino review sites, including, for example, Vegasino NZ, increasingly show readers how important this difference is, because it directly impacts how much trust you have to put into an operator when gambling online.

In this post, we’re going to break the technologies down, showing you exactly how they both work – what they do – and which one gives you a better (and clearer) sense of fairness.

What Is RNG Certification?

RNG stands for Random Number Generator. In the online gambling industry, this basically refers to a software algorithm that produces unpredictable sequences of numbers to determine game outcomes, whether that be card deals, slot spin results, or roulette spins.

In a traditional online casino, players never see this RNG directly and, instead, it’s certified for fairness through third-party testing houses. Whenever a software provider or games studio wants to release a new game, they have to get their game certified, and this usually looks something like this:

1. The casino’s games use an internal RNG algorithm
2. An independent testing lab audits that algorithm
3. The lab verifies that the results are truly random and unbiased
4. The software provider receives a certificate or “seal” of approval

Well-known testing agencies include eCOGRA, iTech Labs, and GLI (Gaming Laboratories International), and all of these labs run millions of simulated game rounds to ensure outcomes fall within expected probability ranges.

If you want a deeper technical breakdown of the mechanics, you can read our full guide on How Casino RNG works, which explains the maths and auditing process in detail.

Pros and Cons of RNG Certification

Pros	Cons
Widely accepted by regulators	You cannot verify individual game results yourself
Required for (most) licensed casinos	You must trust that the audits are ongoing an honest
Works across all traditional casino games	The “behind the scenes” code is NOT made public
Audited by recognised third parties	Certification is very expensive for operators

What Is Provably Fair Gaming?

Provably fair gaming is an entirely different beast, and it basically flips the model entirely on its head. Instead of asking players to blindly trust behind-closed-doors audits, provably fair systems allow any player to independently verify each game outcome using cryptographic methods.

You’ll generally find this approach used in crypto casinos, but the actual principles behind it are simply mathematical. We actually have a pretty detailed and comprehensive guide – Provably Fair Explained – that looks at the in and outs of how this tech works.

It’s quite complex, but at its core, provably fair relies on three core elements:

1. Server Seed: This is generated by a casino, and it’s hashed and shown to the player before playing.
2. Client Seed: This is chosen or influenced by the player.
3. Nonce: This is a counter that changes every round/turn.

When a new game round begins, these values are combined through a cryptographic hash function to produce the game result, and at any point once the game round finishes, the casino reveals the server seed, allowing players to recalculate the result, confirm that the hash matches, and ensure no manipulation/cheating occurred.

Pros and Cons of Provably Fair Technology

Pros	Cons
Players can verify every single outcome	Requires quite a high level of technical understanding
Prevents casinos from cheating	Often very little regulatory oversight
Instantly possible to verify the randomness of each game	Very limited game variety available

Key Differences Between Provably Fair and RNG Casino Games

The core difference between provably fair and traditional RNG casino games lies in transparency and verifiability. With the standard RNG games you’ll find at most online casinos, the systems are, essentially, operating as black boxes; you have to just trust that the casino’s software is working correctly and fairly; you don’t have any way to actually verify this yourself.

Provably fair systems, on the other hand, use cryptographic techniques that allow you to verify the fairness of each individual game outcome yourself. It’s literally not technically possible for a casino to “cheat” or manipulate results using provably fair technology.

In reality, though, the practical differences come down to who you trust most. With RNG-based games, the trust is centralised. You have to believe in the casino, the software provider, and the regulators. With provably fair systems, trust is decentralised and mathematical. You don’t actually need to trust anyone, because you can verify everything yourself.

Which System Should You Actually Care About?

Here’s the honest answer: it depends entirely on what kind of player you are and what you value most when you’re gambling online. If you’re the type of player who enjoys playing at traditional, licensed casinos, and you’re comfortable with existing games, then RNG certification is probably perfectly fine for you. 

The reality is that reputable casinos with licenses from jurisdictions like Malta, the UK, or Curacao have strong incentives to maintain fair games, because losing their license would basically destroy their business – and it puts them at risk of fines worth millions of dollars, or even criminal prosecution!

However, if you’re the type of person who doesn’t like taking anyone’s word for anything (and honestly, in the gambling world, that’s not a bad instinct to have), then provably fair gaming is something you may want to look into – if you have the technological abilities to understand it.

The main trade-off is variety; provably fair technology really hasn’t caught on, and there’s just a few dozen games like this available – so turning to a purely provably fair style of gaming will see you very limited in what you can play, unfortunately.

Ultimately, both systems have their place, and understanding how they work just helps you make better decisions about where and how you choose to play – and here at DashTickets, we don’t recommend one over the other. We prefer to educate you and allow you to make your own mind up!

Last updated: 16/02/2026