PurposeThe purpose of this thread is to look in-depth at the provable fairness systems of as many sites as possible and categorize them based on their strength and any potential flaws. This should enable players to make better decisions as to where to play, and what to watch out for. This thread only attempts to categorize sites that claim to be provably fair, sites that do not claim to be provably fair are outside the scope of this thread.
ListSite | | Thread | | Provably Fair | | Nonce | | Client Seed | | Currencies |
BitDice | | Thread | | With effort/False* | | No | | 3-30 [a-z,A-Z,0-9] | | BTC, LTC, ETH, DOGE |
Just-Dice | | Thread | | Yes | | Yes | | 1-24 [a-z,A-Z,0-9] | | CLAM |
Primedice | | Thread | | Yes | | Yes | | 1-32 [a-z,A-Z,0-9,special] | | BTC |
SafeDice | | Thread | | Yes | | Yes | | 1-15 [a-z,A-Z,0-9] | | BTC, XMR, BCH |
YOLOdice | | Thread | | Yes | | Yes | | 6-128 [a-z,A-Z,0-9,-_ ] | | BTC |
*: BitDice has a combination of first-party provably fair games and third-party non provably fair games.
KeyYes | | I have personally reviewed this system and found it satisfactory |
With effort | | The system is provably fair, but requires the user to jump through more hoops than usual. |
False | | This site claims to be provably fair but either is not or has a large hole in their system |
ExplanationYes: Usually consists of the following: The site generates a server seed and presents the hash of the server seed to the user before betting. Additionally, the user supplies the site with a client seed before betting. This is necessary to ensure that the numbers are generated randomly. A nonce is also generally used so that the user is not required to change their client seed between every bet.
With effort: Usually consists of the above, but either there is no nonce, requiring the user to change their client seed between every bet to remain fair, or there is some other "block" making it more difficult to verify bets.
False: The site claims to be fair, but is not. Could be many things, including but not limited to:
- No client seed is used, so the site can arbitrarily choose the outcome
- Outcomes are not generated deterministically, could claim to be using random numbers from an outside source (Random.org). This is not provably fair, as these claims cannot be proved.
NotesIf you want your site added to this list, please reply below with the URL and a link to the thread in the gambling section of your site. Sites are added when I have time to review the system.
Changelog:
2017-09-20
Created Thread
Added BitDice
Added Just-Dice
Added Primedice
Added SafeDice
Added YOLOdice