InOut Casino Algorithm: How Provably Fair Tech Powers Slot Games

InOut is a boutique studio of casino games based in Cyprus that has become known for its crash, mines, plinko and chart‑driven slots. The developer supplies titles to operators across Europe, Asia and Latin America. What distinguishes InOut’s titles is not only the playful visuals but also the transparency behind each game. The company operates under a Curaçao license (number 1668/JAZ) and describes its products as “provably fair crypto and real‑money games”. InOut uses cryptographic algorithms and hash‑based random number generation to create unpredictable spins and to allow players and operators to verify every result. This article digs into how the algorithm that powers InOut slots works, why it matters and what makes it different from conventional slot machines.

From RNG to Provably Fair: Why the Algorithm Matters Traditional slot algorithms

Classic online slots are driven by a Random Number Generator (RNG), an algorithm that continuously produces a stream of random values. Each time a player hits the spin button, the current numbers are translated into symbols that appear on the reels. Independent testing labs audit these RNGs to ensure they meet statistical randomness standards and achieve a specified Return to Player (RTP), usually between 92 % and 98 %. However, the internal workings of the RNG are not exposed to the public. Players must trust that the casino and the software provider have not manipulated the outcome.

Provably fair technology: transparency meets cryptography

Provably fair systems were developed in the crypto‑gambling community to overcome the trust issue. Instead of asking players to believe the provider, provably fair games let them verify outcomes themselves. The technology combines three core elements:

1. Player seed – before the game starts, the player either chooses or receives a unique random number. This seed acts like the player’s signature.
2. Server seed – the game’s server generates another secret random number (the server seed) and shares its hashed value with the player before bets are placed. The actual number is hidden until the end of the round.
3. Nonce – a counter that starts at zero and increments with each bet so each round uses a different set of seeds.

The server combines the player seed, server seed and nonce to create a final seed. This value is hashed (often using SHA‑256) to produce an unpredictable result. The hash ensures the outcome is determined before the bet and cannot be altered mid‑game. After the round, the server reveals the original seed so players can hash the values themselves and verify that the result matches.

InOut’s adoption of provably fair algorithms

InOut has embraced provably fair technology across its portfolio. On the provider’s review site, it notes that all titles use certified RNG technology and provably fair systems. The company highlights that games undergo testing by independent labs to assess randomness, prize variance and volatility spread. Each outcome is generated with server‑seeded logic and hashed results, and audit logs are available to operators. InOut also holds an Anjouan licence (license number ALSI‑202506032‑FI2) and a Curaçao e‑Gaming licence (1668/JAZ) to show compliance. This combination of licencing and cryptographic verification has helped InOut position itself as a trustworthy provider in a market crowded with less transparent games.

Anatomy of an InOut Slot Algorithm

Step‑by‑step: from spin to result

Let’s break down the typical algorithm used in InOut’s slots. While the exact implementation is proprietary, the overall flow mirrors that of other provably fair systems as described by BGaming and other technology providers:

1. Pre‑round computation – before the round begins, the game engine computes the outcome. It generates a Secret, a random string, and calculates the game result (e.g., which symbols will appear or where the crash multiplier ends). These two values are combined and hashed using SHA‑256 to create a cryptographic fingerprint. This hash is shared with the player so they know the result is fixed before betting.
2. Player seed input – the player can choose a client seed or accept the default. InOut’s system uses this seed along with the server seed to randomize the final outcome, ensuring that the player has an influence on the result without being able to determine it entirely.
3. Spin execution – once the player hits “spin,” the server combines the client seed, server seed and nonce. This combination is fed into the RNG to generate the outcome and update the on‑screen reels or crash multiplier. Because the server seed’s hash was provided in advance, players can later check that it was not changed mid‑game.
4. Outcome reveal and verification – after the round, the game reveals the Result, Secret and server seed. The player (or an independent verification tool) can hash these values and compare the result to the pre‑round hash. If they match, the outcome is confirmed as fair.

RNG, RTP and volatility

Even with provably fair mechanics, InOut’s games still rely on a robust RNG to draw numbers. The RNG output determines the distribution of symbols and therefore the game’s RTP and volatility. On the review site, InOut’s games are said to offer customisable RTP percentages between 95 % and 99 % and adjustable volatility levels. Operators can tailor a title to their audience by setting higher volatility (bigger potential wins but rarer payouts) or lower volatility for more frequent, smaller hits.

Security and hash functions

The backbone of the algorithm is the SHA‑256 hash function. According to GammaStack’s analysis, SHA‑256 converts each set of inputs into a 256‑bit hash on the Bitcoin network, ensuring each spin is different and independent. The security benefits are twofold:

• Immutability – the outcome is set before the bet, so the casino cannot change it mid‑spin.
• Unpredictability – even if a malicious actor intercepts the hashed server seed, they cannot reverse it to find the original number because SHA‑256 is one‑way.

These features make it extremely difficult to manipulate results or hack the system.

InOut’s Game Portfolio and Algorithm Customisation

Variety with provability

InOut’s catalogue includes crash games like Chicken Road, Hamster Run and Space Survivor, as well as Mines, Plinko AZTEC, and a growing suite of arcade‑style slots. Each game features dynamic gameplay: players choose when to cash out before a crash, flip over tiles to avoid bombs or drop balls through a plinko board. According to a news article about InOut’s partnership with Betting.bet, the company offers “an entertaining selection of instant, crash and arcade‑style games in both crypto and real‑money formats”. This design is intentionally quick and interactive, appealing to younger players accustomed to mobile gaming.

Customisable parameters

One of the most notable aspects of InOut’s platform is its customisation options. According to the provider’s review site, operators can adjust:

• RTP and volatility – choose between high‑risk/high‑reward or lower‑risk settings.
• Bonus triggers and difficulty modes – configure when bonus rounds appear and how challenging the game is, which affects the win frequency.
• Currency and language support – InOut supports over 100 currencies and 15+ languages, making it easy to integrate across different markets.
• Integration and support – the API is designed for rapid integration, with 24/7 technical support and an audit log for operators to verify fairness.

This flexibility explains why InOut’s games appear not only on crypto casinos but also on mainstream betting platforms. Operators can tailor games for promotional campaigns, high‑roller tournaments or low‑stake casual play.

Note: RTP values are typical ranges cited in reviews; individual operators may set different values within allowed limits.

Voices from the Industry and Players

“InOut has an engaging selection of instant, crash and arcade‑style games, all of which support crypto and over 100 currencies. The games are provably fair, which means our players can verify the outcome of every round.” — Abigail Moses, marketing manager at Betting.bet.

“I finally hit the rare jackpot in the mission! It was exhilarating because you know the algorithm can’t be rigged — it makes every near‑miss feel like a real challenge.” — Rajesh Kumar, player review of an InOut mission game.

These testimonies illustrate how both industry insiders and players appreciate the transparency and entertainment value provided by InOut’s provably fair slots.

Comparing Provably Fair and Traditional RNG

Transparency and verification

In a traditional RNG slot, players see the outcome but cannot verify the underlying randomness. They must trust that regulators and independent testers have done their job. Provably fair systems add a layer of verifiability. Every spin is accompanied by a hash receipt, and players can check that the server seed revealed post‑spin matches the hashed value shown before the bet. This transparency builds trust and appeals to crypto‑savvy players.

Player involvement

Provably fair algorithms let the player supply a client seed. Although the seed doesn’t determine the outcome, it influences the final hash so that the casino cannot unilaterally control results. This involvement gives players a sense of agency, even though the game remains random. Traditional RNG slots do not incorporate any player‑supplied input.

Regulatory compliance

Standard slots are subject to licensing and certification, but the randomness remains a black box. Provably fair games must still meet regulatory requirements, yet the cryptographic proof reduces the need for frequent audits. Some jurisdictions, however, have yet to fully incorporate provably fair mechanics into their frameworks, which can slow adoption.

Complexity and scalability

Provably fair algorithms work well for simple games like crash or mines because the outcome can be hashed quickly. When multiple reels, paylines and bonus features are involved—as in video slots—the number of possible outcomes grows exponentially. Some industry observers argue that provably fair systems are more challenging to scale for complex slots without slowing the game down. Hybrid approaches that combine traditional RNG for reel stops with hash‑based verification for bonus events may become more common.

Tips for Players: How to Verify Your Spin

1. Check the hashed seed – before spinning, look for the hashed server seed displayed somewhere in the game interface. This value should remain constant until the round ends.
2. Record your client seed – if the platform allows you to set your own seed, choose a memorable value or use a random generator. Save it for later verification.
3. Use verification tools – after the game, copy the server seed, client seed and nonce into an independent hash generator. Many casinos provide an on‑site tool, or you can use open‑source utilities to recompute the hash and confirm it matches the pre‑game hash.
4. Be aware of volatility – high‑volatility crash games can produce long losing streaks before a big win. Set limits and know when to cash out. Some InOut games display risk levels to guide players on the best cash‑out point.
5. Verify licensing – ensure the casino offering the game holds a valid licence (e.g., Curaçao or Anjouan for InOut) and that its platform has been independently audited.

Future Outlook for InOut and Provably Fair Slots

The provably fair movement continues to gain traction among crypto casinos and mainstream operators alike. Industry reports predict that demand for transparent gambling products will grow as players become more tech‑savvy and regulatory standards evolve. InOut’s combination of high RTP, customisable volatility and multi‑currency support positions it well to capitalise on this trend. SoftSwiss, GammaStack and other technology providers expect more complex slots, card games and roulette wheels to adopt provably fair algorithms. Meanwhile, improvements in hash functions and Web3 integration could allow for faster verification and even more robust security.

Conclusion

InOut’s slot algorithm is built on the foundation of provably fair technology. By combining server and player seeds, using nonce counters and hashing results before each spin, the provider delivers games where outcomes are both unpredictable and verifiable. Independent audits and licencing underpin this transparency, while adjustable RTP and volatility parameters give operators flexibility. Quotes from industry partners and players highlight the balance between entertainment and trust. As the iGaming landscape evolves, algorithms like those used by InOut will likely set the standard for fairness, particularly in crypto‑facing casinos. For players, understanding and verifying each spin transforms slot gaming from a leap of faith into an informed, trust‑driven experience.

In summary, the report explains that InOut’s casino slots rely on a provably fair algorithm combining server and player-generated seeds with a nonce. This design ensures transparency by hashing the predetermined game outcome and giving players a cryptographic receipt before they place a bet, allowing them to verify results independently. The algorithm uses SHA-256 hashing on the Bitcoin network and independent audits, delivering return-to-player rates between 95 % and 99 %, adjustable volatility, and support for over 100 currencies.

The report also highlights InOut’s diversified game portfolio—crash titles like Chicken Road and Minesweeper-style games—where provably fair mechanics are applied. These games allow operators to customise RTP, volatility, bonus triggers, and difficulty settings, while players can verify each round through publicly shared hashed seeds. The author suggests that as demand for transparent gaming grows, InOut’s approach positions it well in the competitive online gambling market.