Many online casinos use a system known as "provably fair" to ensure that their games are fair and unbiased. Provably fair is a method of verifying the fairness of a game by using mathematical algorithms and cryptographic techniques. In provably fair games, players can verify that the outcome of each game is random and has not been manipulated by the casino. Online casino games are typically fair and use random number generators to ensure the outcome of each game is random and unbiased.