GAME AUTHENTICATION METHOD FOR GAMING MACHINES AND GAME PLATFORM WITH AUTHENTICATION CAPABILITY
A gaming machine is configured to calculate hash values for both game loader software and game software. The game loader software is executed to load game software into random access memory at the gaming machine, and game software is executed at the gaming machine to provide a wagering game or a portion thereof. The calculated hash values are compared to hash values produced from a known authentic version of the game software and of the game loader software. The game software is allowed to load and present a wagering game if both of these comparisons are true, that is, if both comparisons show that the calculated and pre-calculated values are equal.
1 . A gaming machine including:
(a) a cabinet having associated therewith a user interface, a game credit device, and a display device;
(b) a processor positioned within the cabinet and in operative communication with the user interface and display device, the processor adapted to, upon startup thereof, execute BIOS software and OS software stored at the gaming machine;
(c) one or more random access memory devices positioned within the cabinet and in operative communication with the processor;
(d) a first read-only memory device positioned within the cabinet and readable by the processor, the first read-only memory device storing game software executable by the processor to conduct at least a portion of a wagering game;
(e) a second read-only memory device positioned within the cabinet and readable by the processor, the second read-only memory device storing an encrypted hash value for the game software stored in the first read-only memory device;
(f) a third read-only memory device positioned within the cabinet and readable by the processor, the third read-only memory device storing game loader software and an encrypted hash value for the game loader software, the game loader software being executable to,
(i) calculate a hash value for the game software,
(ii) decrypt the encrypted hash value for the game software,
(iii) compare the calculated hash value for the game software with the decrypted hash value for the game software,
(iv) calculate a hash value for the game loader software,
(v) decrypt the encrypted hash value for the game loader software,
(vi) compare the calculated hash value for the game loader software with the decrypted hash value for the game loader software,
(vii) enable the gaming machine for play of the game provided by the game software if the comparison at (iii) shows that the compared values in that step are equal and if the comparison at (vi) shows that the compared values in that step are equal, and
(viii) prevent play of the game provided by the game software if either the comparison at (iii) shows that the compared values in that step are not equal or the comparison at (vi) shows that the compared values in that step are not equal, or if both comparisons show the compared values to be not equal.
2 . The gaming machine of claim 1 wherein the game loader software reads the first read-only memory device to identify a hash algorithm specification stored in the first read-only memory device, and employs the specified hash algorithm to calculate the hash value for the game software and to calculate the hash value for the game loader software.
3 . The gaming machine of claim 2 wherein the first read-only memory device is a jurisdictional memory device which is specific to a particular gaming jurisdiction.
4 . A gaming system including:
(a) one or more gaming system servers;
(b) a number of gaming machines operatively connected for network communications with at least one of the one or more gaming system servers;
(c) at least one of the gaming machines including a processor positioned within a cabinet of the gaming machine, the processor adapted to, upon startup thereof, execute BIOS software and OS software stored at the gaming machine;
(d) one or more random access memory devices positioned within the cabinet of the at least one of the gaming machines and in operative communication with the processor of that gaming machine;
(e) a first read-only memory device positioned within the cabinet of the at least one of the gaming machines and readable by the processor of the at least one of the gaming machines, the first read-only memory device storing game software executable by the processor of that gaming machine to conduct at least a portion of a wagering game;
(f) a second read-only memory device positioned within the cabinet of the at least one of the gaming machines and readable by the processor of that gaming machine, the second read-only memory device storing an encrypted hash value for the game software stored in the first read-only memory device;
(g) a third read-only memory device positioned within the cabinet of the at least one of the gaming machines and readable by the processor of that gaming machine, the third read-only memory device storing game loader software and an encrypted hash value for the game loader software, the game loader software being executable to,
(i) calculate a hash value for the game software,
(ii) decrypt the encrypted hash value for the game software,
(iii) compare the calculated hash value for the game software with the decrypted hash value for the game software,
(iv) calculate a hash value for the game loader software,
(v) decrypt the encrypted hash value for the game loader software,
(vi) compare the calculated hash value for the game loader software with the decrypted hash value for the game loader software,
(vii) enable the respective gaming machine for play of the game provided by the game software if the comparison at (iii) shows that the compared values in that step are equal and if the comparison at (vi) shows that the compared values in that step are equal, and
(viii) prevent play of the game provided by the game software if either the comparison at (iii) shows that the compared values in that step are not equal or the comparison at (vi) shows that the compared values in that step are not equal, or if both comparisons show the compared values to be not equal.
5 . The gaming system of claim 4 wherein the game loader software reads the first read-only memory device of the respective gaming machine to identify a hash algorithm specification stored in that first read-only memory device, and employs the specified hash algorithm to calculate the hash value for the game software and to calculate the hash value for the game loader software at that gaming machine.
6 . The gaming system of claim 5 wherein the first read-only memory device of the respective gaming machine is a jurisdictional memory device which is specific to a particular gaming jurisdiction.
7 . A method of operating a gaming machine having a gaming machine processor for executing game software to provide a wagering game through the gaming machine, the method including:
(a) under the control of game loader software, operating the processor of the gaming machine to identify game software to be loaded into random access memory at the gaming machine;
(b) with the processor of the gaming machine, calculating a hash value for the identified game software;
(c) with the processor of the gaming machine, reading an encrypted hash value for the identified game software from read-only memory at the gaming machine and decrypting the encrypted hash value for the identified game software;
(d) with the processor of the gaming machine, comparing the calculated hash value for the identified game software with the decrypted hash value for the identified game software;
(e) with the processor of the gaming machine, calculating a hash value for the game loader software;
(f) with the processor of the gaming machine, reading an encrypted hash value for the game loader software from read-only memory at the gaming machine and decrypting the encrypted hash value for the game loader software;
(g) with the processor for the gaming machine, comparing the calculated hash value for the game loader software with the decrypted hash value for the game loader software;
(h) enabling the gaming machine for play of the game provided by the identified game software if the comparison of the calculated hash value of the game software with the decrypted hash value of the game software shows that these compared values are equal and if the comparison of the calculated hash value of the game loader software with the decrypted hash value for the game loader software shows that these compared values are equal; and
(i) preventing play of the game provided by the identified game software if either the comparison of the calculated hash value for the identified game software and the decrypted hash value for the identified game software shows that these compared values are not equal or the comparison of the calculated hash value for the game loader software and the decrypted hash value for the game loader software shows that these compared values are not equal, or if both comparisons show that the compared values are not equal.
8 . The method of claim 7 wherein the game loader software reads the first read-only memory device to identify a hash algorithm specification stored in the first read-only memory device, and employs the specified hash algorithm to calculate the hash value for at least one of the game software or the game loader software.
9 . The method of claim 8 wherein the first read-only memory is a jurisdictional memory device which is specific to a particular gaming jurisdiction.
10 . The method of claim 8 further including employing a default hash algorithm to calculate the hash value for the game loader software.