Verifying Outcomes with Open-Source Cryptography
The promise of Provably Fair technology is that players do not need to trust the casino’s honesty—they can verify it mathematically. However, many players never utilize the verification tools because cryptographic concepts seem intimidating.
Here is a practical, step-by-step walkthrough for independently verifying any provably fair game round.
Step 1: Record Pre-Round Credentials
Before the round starts, the casino interface displays the Hashed Server Seed (a 64-character hexadecimal string). Copy and save this string. This is the casino’s cryptographic commitment that the result is predetermined and cannot be altered during the round.
Step 2: Retrieve Post-Round Seeds
Once the round concludes, the casino reveals:
- The Unencrypted Server Seed (the raw string).
- Your active Client Seed (which you had the option to customize).
- The round Nonce (a sequential integer tracking round count).
Step 3: Verify the Commitment Hash
To prove the casino did not alter the server seed after observing your bet:
- Open any independent, open-source hash tool (such as CyberChef or a terminal).
- Compute the SHA-256 hash of the unencrypted Server Seed:
echo -n "raw_server_seed_here" | sha256sum - Confirm that the calculated hash matches the Hashed Server Seed displayed before the round.
Step 4: Recompute the Crash Multiplier
Next, combine the credentials using HMAC-SHA256 or SHA-512 (depending on the game engine protocol):
echo -n "server_seed:client_seed:nonce" | sha512sum
Take the first 8 hexadecimal characters, convert to decimal, and apply the game’s division modulo. If your calculated number matches the on-screen crash multiplier, the round is mathematically proven to have been executed without manipulation.