Game chip, game chip writer/reader, and game chip monitoring system
View Patent ↗A game chip writer for writing at least identification information in a game chip used for a game includes an encryption unit for encrypting at least part of recording-information with use of a private key and a writing unit for writing the encrypted information. A game chip reader includes a reading unit for reading the encrypted information from the game chip and a decryption unit for decrypting the read information with use of a public key.
1. 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.
2. The game chip-monitoring system according to claim 1 , wherein:
the game chip is configured to store chip-unique information in an encrypted condition using the private key to do so;
the gaming table is configured to read from the game chip the encrypted chip-unique information; and
the controller is configured to (1) receive from the gaming table the chip-unique information read by the gaming table; (2) decrypt, using the public key to do so, the chip-unique information that has been received in the encrypted condition; (3) detect fraudulent use of the game chip based on the decrypted chip-unique information; and (4) execute the predetermined notification process based on a detection result.
3. The game chip-monitoring system according to claim 1 , further comprising a writer configured to store on the game chip the player's information that has been read from the card, wherein the writer is configured to (1) compress the player's information that has been read from the card using the predetermined function to do so; (2) encrypt, using the private key to do so, the player's information that has been compressed in step (1); and (3) write on the game chip the player's information compressed/encrypted in step (2).
4. The game chip-monitoring system according to claim 3 , wherein the writer executes step (3) after initializing the compressed/encrypted player's information stored on the game chip.