RNG in Casinos: Who Tests RNGs for UK Casinos?

The UK Gambling Commission (UKGC) is the main gambling regulator responsible for licensing and regulating gambling businesses in Great Britain.

It sets technical standards for remote gambling software and online casinos, including requirements for random number generators (RNGs). 

Under the UKGC's Remote Gambling and Software Technical Standards, RNG outputs and game outcomes must be "acceptably random". This means there must be a high degree of confidence that outcomes are random, supported by recognised statistical analysis and testing.

The UKGC does not simply rely on a casino's own claims that its RNG is fair. For applicable remote gambling products and licensed casinos like Genting Casino, independent third-party testing is part of the regulatory framework. 

Learn more about this through the following points:

• What are approved Test Houses?
• How are RNG test houses approved?
• What do Test Houses check?
• What does the UKGC do?

What are approved Test Houses?

Approved Test Houses are independent organisations authorised by the UKGC to test gambling products against relevant technical standards.

The UKGC states that some gambling products must be tested by an approved Test House before they are released to the market. Operators and gambling software manufacturers must use an appropriately accredited Test House for the areas in which they are seeking approval.

For remote gambling, this can include testing the RNGs and games used by an online casino, such as online slot games.

The UKGC's approved list is important because not every testing organisation is automatically authorised to carry out every type of gambling test. Test Houses must have the appropriate approval for the gambling facilities they are assessing.

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Genting Casino Tip: If you see a claim that a casino game has been independently tested, check the UKGC's current approved Test Houses list rather than relying only on a testing logo or statement.

How are RNG test houses approved?

Test Houses must meet specific accreditation and approval requirements before they can carry out relevant testing.

The UKGC has worked with the United Kingdom Accreditation Service (UKAS) to develop a Test House Framework. Accreditation to ISO/IEC 17025, along with selected requirements from ISO/IEC 17065 and ISO/IEC 27002, is mandatory for Test Houses.

Approval also depends on the type of testing an organisation is equipped to perform. A Test House must demonstrate that it has the appropriate ability, resources, policies and procedures for the areas covered by its application.

This helps ensure that testing is carried out by organisations with suitable technical competence rather than by an unqualified third party.

What do Test Houses check?

The UKGC's testing strategy sets out several areas that approved Test Houses may assess. These include:

• Reviewing RNG documentation to understand how the system is implemented.

• Checking the RNG algorithm or hardware for known weaknesses.

• Reviewing source code to verify that the RNG is implemented as documented.

• Statistically testing raw RNG output.

• Testing scaled or shuffled data where relevant.

• Investigating and reassessing any identified non-compliance.

Testing can therefore look at both the underlying technology and the results it produces.

The aim is to establish whether the RNG operates as intended and whether its outputs meet the applicable requirements for randomness and unpredictability. You may observe how an approved RNG works when playing RNG casino games, such as slots, or even in live casino games that use a mix of physical and digital equipment, such as in live slot games.

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What does the UKGC do?

The UKGC provides the regulatory framework within which testing takes place.

Its Remote Gambling and Software Technical Standards set requirements that licensed remote gambling and software operators must meet. The Commission also sets the testing strategy and maintains the list of approved Test Houses.

For applicable new games and RNGs, satisfactory testing must be completed and the relevant report submitted to the UKGC before the product is released. The Commission also requires relevant operators to submit game and RNG test results through its games register.

Understanding RNG Oversight

RNG fairness in the UK involves several layers. The UKGC establishes the technical requirements and testing framework, while approved Test Houses carry out independent assessments of applicable games and RNGs.

The current UKGC list includes several approved organisations, each required to meet relevant accreditation and approval standards. Their testing can involve source-code reviews, statistical analysis and checks of the RNG's implementation.

For players, the most useful step is to understand this structure rather than trying to judge RNG fairness from personal results. Checking licensing information and understanding how independent testing works can provide a clearer picture of the safeguards behind regulated gambling products.

Genting Casino believes clear information can help players make informed decisions. Whether considering an online casino or a live casino product, understanding how outcomes are generated and regulated is more useful than trying to predict individual results.

Learning about RNG certification can help you understand how gambling products are tested, but it should not be used as a reason to gamble more. Responsible gambling means treating gambling as entertainment rather than a way to make money or recover losses. Take breaks, keep gambling within limits that are appropriate for you and avoid chasing outcomes. If gambling becomes difficult to control or begins to cause problems, consider using responsible gambling tools and seeking independent support.

FAQs

Who regulates casino RNGs in the UK?

The UK Gambling Commission regulates licensed gambling businesses in Great Britain and sets technical standards for RNG-driven gambling products.

Who actually tests casino RNGs?

Approved independent Test Houses carry out applicable RNG and game testing. The UKGC maintains the official list of approved Test Houses.

Does the UKGC test every RNG itself?

No. The regulatory framework uses approved independent Test Houses for applicable third-party testing. Operators must submit relevant test results to the UKGC.

What does RNG testing check?

Testing can include reviewing RNG documentation and source code, checking for known weaknesses and statistically testing raw and processed RNG output.

Can players check whether an RNG is certified?

Players can check the operator's UKGC licence and look for credible information about testing. However, the detailed technical testing process is carried out by approved Test Houses rather than individual players.