Cryptographic Blackjack

Internet casinos have become a billion dollar industry [21]. The increasing popularity of online gaming is surprising given its weak guarantees of fairness compared to those offered by physical casinos. We apply a bit commitment protocol to an online blackjack game that provides strong fairness guarantees between the player and casino without compromising the play of the game. We introduce a set of experiments that capture the fairness guarantees of the protocol, and describe how this protocol can be extended to other online games.