Granted Patent B2

US 8,226,473 · App. 10/119,663 · Granted Jul 24, 2012

Abstract

Claims (29)

1. A method of authenticating memory contents of a gaming machine, comprising:

storing, in a high capacity storage device, a game data set including a plurality of data files and a manifest file having a stored authentication code for each of the plurality of data files;

storing, in a boot memory, contents including an authentication program;

prior to operation of a wagering game on the gaming machine, authenticating the contents of the boot memory;

after authenticating the contents of the boot memory and prior to operation of the wagering game at the gaming machine, authenticating the game data set as a whole with the authentication program;

after authenticating the contents of the boot memory and the game data set as a whole, operating the wagering game at the gaming machine by using data files from the plurality of data files; and

during the operation of the wagering game at the gaming machine, performing a parallel authentication of (i) the game data set as a whole in a first cycle of the parallel authentication and (ii) the data files being used to operate the wagering game in a second cycle of the parallel authentication, the authentication of the data files in the second cycle using the stored authentication codes in the manifest file within the game data set that has been authenticated as a whole in the first cycle.

2. The method of claim 1 , wherein the boot memory is a read-only memory.

3. The method of claim 1 , wherein the high-capacity storage device is selected from the group consisting of a CD-ROM, a hard disk drive, and a flash storage device.

4. The method of claim 1 , wherein the authentication of the game data set as a whole in the first cycle of the parallel authentication includes comparing a computed message digest corresponding to the game data set.

5. The method of claim 1 , wherein the authentication of the data files in the second cycle of the parallel authentication includes comparing computed message digests corresponding to the data files.

6. The method of claim 1 , wherein the authentication of the data files in the second cycle of the parallel authentication includes a DSA verify operation.

7. The method of claim 1 , further including, within the second cycle of the parallel authentication, authenticating the boot memory.

8. The method of claim 1 , wherein the authentication of the game data set as a whole and each data file includes authenticating the data files in a order listed in the manifest file stored in the high capacity storage device.

9. A method of authenticating memory contents of a gaming machine, comprising:

storing, in at least one memory device, (i) a game data set including a plurality of data files and a file-level authentication code for each of the plurality of data files, and (ii) a game-data-set authentication code generated from the game data set as a whole, the plurality of data files including executable code files, sound files, and graphics files;

prior to operation of a wagering game at the gaming machine, authenticating the game data set as a whole using the game-data-set authentication code;

after authenticating the game data set as a whole, operating the wagering game at the gaming machine by using the executable code files, the sound files, and the graphics files from the plurality of data files; and

during the operation of the wagering game at the gaming machine, conducting a continuous run-time authentication procedure having a first cycle and a second cycle, the first cycle including the repeated authentication of the game data set as a whole with the use of game-data-set authentication code, the second cycle including the repeated authentication of each of the plurality of data files with the use of the file-level authentication codes from the game data set that is subject to authentication in the first cycle.

10. The method of claim 9 , further including, prior to operation of the wagering game at the gaming machine, authenticating a boot memory containing an authentication program to be used in the first cycle and the second cycle of the parallel authentication.

11. The method of claim 9 , wherein the at least one memory device is a high-capacity storage device that is selected from the group consisting of a CD-ROM, a hard disk drive, and a flash storage device.

12. The method of claim 9 , wherein the game-data-set authentication code is a message digest and the authentication of the game data set as a whole in the first cycle includes comparing a computed message digest corresponding to the game data set.

13. The method of claim 9 , wherein the file-level authentication codes are message digests and the authentication of the data files in the second cycle of the parallel authentication includes comparing computed message digests corresponding to the data files.

14. The method of claim 9 , wherein the file-level authentication codes are digital signatures and the authentication of the data files in the second cycle of the parallel authentication includes a DSA verify operation.

15. The method of claim 9 , further including, within the second cycle of parallel authentication, authenticating a boot memory as a whole.

16. The method of claim 9 , wherein the authentication of the data files includes authenticating the data files in an order listed in a manifest file stored in the at least one memory device, the manifest file being a file within the game data set and including the file-level authentication codes.

17. The method of claim 16 , wherein the manifest file is authenticated in the first cycle of the parallel authentication as the game data set as a whole is authenticated.

18. The method of claim 16 , wherein the another memory device is a serial memory containing jurisdictional-related information.

19. The method of claim 9 , wherein the parallel authentication includes authenticating another memory device as a whole during the first cycle or second cycle.

Assignments (8)