Patent ID: 8172674

Claim:
A game chip-monitoring system, comprising: a card configured to store thereon a player's information; a game chip configured to compress the player's information stored on the card using a predetermined function to do so, wherein the game chip is configured to use a private key to store the compressed player's information in an encrypted condition; a gaming table configured to read from the card the player's information stored thereon and the compressed/encrypted information stored in the game chip; and a controller disposed within a game device including the gaming table, the controller being configured to receive from the gaming table the information read from the card and from the game chip, the controller being configured to (i) compress, using the predetermined function, the player's information stored on the card; (ii) decrypt, using a public key, the compressed/encrypted player's information received from the game chip; (iii) judge whether the player's information that has been compressed in step (i) and the player's information compressed/encrypted on the game chip and decrypted in step (ii) correspond to each other by collating the information with each other using a digital signature system; and (iv) execute a predetermined fraudulent-act notification process in a case where the information does not correspond to each other as a result of a judgment in step (iii), and set as valid the game chip having been bet in a case of the information corresponding to each other; wherein the controller performs (i), (ii), (iii), and (iv) at a side of the game device.