Probably for as long as there have been wagering games, players have sought an edge. Depending on the orientation of your moral compass, sometimes that search tips over into outright cheating. And for as long as there have been cheats, the house has tried to stop them. Today, when every smartphone is a computer, camera, and communications device, the potential for cheating is probably greater than it’s ever been. But the casinos are fighting back with technology of their own.