chips) that casinos use? Well they have a ton of ways to protect against that.
Why cheat a card game when you can just counterfeit the fake money (ie. Search for playing cards with barcodes and you can find all sorts of devices and playing cards to cheat your friends, but they are also used by casinos to ensure the cards are the correct ones for that particular table. Casinos have to comply with all sorts of regulations where video surveillance is necessary. Every single table will have dedicated cameras to watch the dealers and the players.
This trillion dollar industry also employs state of the art technology to monitor operations and thwart would-be cheaters daily. Everything covered thus far is relatively low tech.
