The electronic casino gaming system consists of several system components, including a microprocessor (12), a main memory unit (13) that is typically a random access memory, and a system boot ROM (14). Also included in the electronic casino gaming system are a non-volatile RAM (17), a mass storage unit (18), a disk subsystem (19), and a PCI bus (20). The disk subsystem (19) preferably supports SCSI-2 with options of fast and wide. A video subsystem (22) is also included in the electronic casino gaming system and is coupled to the PCI bus (20) to provide full color still images and MPEG movies.

Patent
   RE39401
Priority
Jun 29 1995
Filed
Jun 17 1996
Issued
Nov 14 2006
Expiry
Jun 29 2015

TERM.DISCL.
Assg.orig
Entity
Large
17
87
all paid
0. 90. A casino gaming system comprising:
a remote memory disposed in a location remote from a casino gaming apparatus, said remote memory having first gaming data relating to a first casino game stored therein; and
a network that operatively couples said remote memory to said casino gaming apparatus,
the casino gaming apparatus comprising:
a casino game console;
a video display unit;
a first memory, providing an executable space for a processor, disposed in said casino game console;
a second memory storing second gaming data related to a second casino game;
a third memory storing an operating system adapted to control access to the second memory wherein the operating system is authenticated prior to the authentication of the first gaming data and the second gaming data;
a network interface coupled to the gaming console for connecting to the network; and
the processor disposed in said casino game console and being operatively coupled to said video display unit, said first memory, said second memory, said third memory and the network interface;
said processor operable to transfer first gaming data relating to the first casino game from the remote memory to the gaming apparatus; and
said processor operable to authenticate the first gaming data or the authenticate the second gaming data.
0. 16. A casino gaming system comprising:
a remote memory disposed in a location remote from a casino gaming apparatus, said remote memory having gaming data relating to a first casino game stored therein; and
a network that operatively couples said remote memory to said casino gaming apparatus,
the casino gaming apparatus comprising:
a casino game console;
a video display unit;
a main memory, providing an executable space for a processor;
a second memory disposed in said casino game console, said second memory storing gaming data related to a casino game;
a third memory storing an operating system, said third memory being disposed in said casino game console, wherein the operating system is enabled to control access to the second memory and wherein the operating system is authenticated prior to authentication the gaming data relating to the casino game stored on the second memory;
a network interface coupled to the gaming console for connecting to the network; and
the processor disposed in said casino game console and being operatively coupled to said video display unit, said first memory, said second memory, said third memory and the network interface;
said processor operable to transfer gaming data relating to the first casino game from the remote memory to the casino gaming apparatus,
said processor operable to cause said transferred gaming data relating to the first casino game to be authenticated based on at least a comparison of a first hash value generated from said transferred gaming data relating to the first casino game with a second hash value generated from known gaming data.
0. 34. A casino gaming system comprising:
a remote memory disposed in a location remote from a casino gaming apparatus, said remote memory having gaming data relating to a plurality of casino games stored therein, the gaming data relating to the plurality of casino games; and
a network that operatively couples said remote memory to said casino gaming apparatus,
the casino gaming apparatus comprising:
a casino game console;
a video display unit;
a main memory providing an executable space for a processor;
a disk memory having gaming data relating to a casino game stored therein, said disk memory being disposed in said casino game console;
a memory storing second logic for accessing files on a disk memory or the files on the remote memory wherein the system logic is authenticated prior to authenticating the gaming data and wherein said memory is disposed in said casino game console;
a network interface coupled to the gaming console for connecting to the network; and
the processor disposed in said casino game console and being operatively coupled to said video display unit, said main memory, said memory and said disk memory;
said processor operable to cause said gaming data relating to the casino game to be authenticated based on a comparison of at least a hash value generated from said gaming data with a known hash value; and
said processor operable to transfer first gaming data relating to a first casino game from the plurality of casino games stored on the remote memory to the gaming apparatus and to authenticate the first gaming data based on at least a comparison of at least a first hash value generated from said first gaming data with a first known hash value.
0. 52. A casino gaming system comprising:
a remote memory disposed in a location remote from a casino gaming apparatus, said remote memory having first gaming data relating to a first casino game stored therein; and
a network that operatively couples said remote memory to said casino gaming apparatus,
the casino gaming apparatus comprising:
a casino game console;
a video display unit;
a first memory providing an executable space for a processor said first memory being disposed in said casino game console;
a second memory operable to store gaming data related to a casino game;
a third memory storing an operating system wherein the operating system is authenticated prior to an authentication of the gaming data stored in the second memory;
a network interface coupled to the gaming console for connecting to the network;
at least one peripheral device coupled to the casino game console wherein the peripheral device includes a memory device for storing a fixed data set, a program or combination thereof, and wherein prior to allowing the program or the fixed data set to participate in system operations on the casino gaming apparatus, the casino gaming apparatus is operable to authenticate the fixed data set or the program stored on the memory device; and
the processor disposed in said casino game console and being operatively coupled to said video display unit, said first memory, said second memory, said third memory and the peripheral device,
said processor operable to transfer first gaming data relating to the first casino game from the remote memory to the casino gaming apparatus; and
said processor operable to authenticate said gaming data, said first gaming data, the fixed data or the program.
0. 69. A casino gaming system comprising:
a first remote memory disposed in a location remote from a casino gaming apparatus, said remote memory having a first gaming data relating to a first casino game stored therein;
a second remote memory disposed in a location remote from the casino gaming apparatus, said second remote memory operable to receive and to store information relating to the authentication of gaming data on the casino gaming apparatus;
a network that operatively couples said first remote memory and said second remote to said casino gaming apparatus,
the casino gaming apparatus comprising:
a casino game console;
a video display unit;
a first memory, providing an executable space for a processor, disposed in said casino game console;
a second memory disposed in said casino game console, said second memory storing second gaming data related to a second casino game;
a third memory storing an operating system, said third memory being disposed in said casino game console, wherein the operating system is enabled to control access to the second memory and wherein the operating system is authenticated prior to an authentication of the second gaming data relating to the second casino game stored on the second memory;
a network interface coupled to the gaming console for connecting to the network; and
the processor disposed in said casino game console and being operatively coupled to said video display unit, said first memory, said second memory, said third memory and the network interface;
said processor operable to transfer first gaming data relating to the first casino game from the remote memory to the gaming apparatus;
said processor operable to authenticate the first gaming data or the second gaming data; and
said processor operable to send information relating to the authentication of the first gaming data or authentication of the second gaming data to the second remote memory location.
0. 1. An electronic gaming system for providing authentication of a data set associated with a casino type game, said system comprising:
(a) a first storage means for storing a game data set and a game signature comprising an encrypted version of a unique primary abbreviated game bit string computed from said game data set;
(b) a second storage means for storing,
an anchor application including a first authentication program capable of determining the validity of said game data set by,
computing a complementary abbreviated game bit string from said game data set,
decrypting said game signature set to recover said primary abbreviated game bit string,
comparing said complementary abbreviated game bit string with said primary abbreviated game bit string to determine whether a match is present, and
an anchor signature including an encrypted version of a unique primary abbreviated anchor bit string computed from said anchor application;
(c) a third storage means for storing a second authentication program capable of determining the validity of said anchor application by,
computing a complementary abbreviated anchor bit string from said anchor application,
decrypting said anchor signature to recover said primary abbreviated anchor bit string, and
comparing said complementary abbreviated anchor bit string with said primary abbreviated anchor bit string to determine whether a match is present; and
(d) processing means for enabling said first authentication program to determine the validity of said game data set and for enabling said second authentication program to determine the validity of said anchor application.
0. 2. An electronic gaming system as recited in claim 1 further comprising a fourth storage means for storing basic input/output system (BIOS) code.
0. 3. An electronic gaming system as recited in claim 2 wherein said fourth storage means is an unalterable ROM device.
0. 4. An electronic gaming system as recited in claim 1 wherein said third storage means further stores operating system code, operating system drivers, and bootstrap code.
0. 5. An electronic gaming system as recited in claim 1 wherein said first storage means and said second storage means comprise a single mass storage means.
0. 6. An electronic gaming system as recited in claim 1 wherein said first storage means is a mass storage memory device.
0. 7. An electronic gaming system as recited in claim 1 wherein said third storage means is an unalterable read only memory.
0. 8. An electronic gaming system as recited in claim 1 wherein said first storage means is a CD ROM.
0. 9. An electronic gaming system as recited in claim 1 wherein said first storage means is a hard disk drive.
0. 10. An electronic gaming system as recited in claim 1 wherein said first storage means comprises a network storage system which is remote from the electronic gaming system.
0. 11. An electronic gaming system as recited in claim 1 wherein said second storage means comprises a network storage system which is remote from the electronic gaming system.
0. 12. An electronic gaming system as recited in claim 1 wherein said game data set is a game-modifying data set for changing game rules parameters of the casino type game.
0. 13. An electronic gaming system as recited in claim 12 wherein said game-modifying data set includes a memory handler modifying data set for changing money handling parameters of the casino type game.
0. 14. An electronic gaming system as recited in claim 12 wherein said game-modifying data sets include a graphics modifying data set for changing graphics parameters of the casino type game.
0. 15. An electronic gaming system as recited in claim 12 wherein said game-modifying data sets include a sound driver modifying data set for changing sound parameters of the casino type game.
0. 17. The casino gaming system as defined in claim 16 wherein said second memory comprises an optical disk.
0. 18. The casino gaming system as defined in claim 16 further comprising at least one peripheral device coupled to the gaming console including a memory device wherein the processor is operable to authenticate contents of the memory device.
0. 19. The casino gaming system as defined in claim 16 wherein said second memory comprises a magnetic hard disk.
0. 20. The casino gaming system as defined in claim 16 wherein said second memory is operable as a read-only memory.
0. 21. The casino gaming system as defined in claim 16 wherein the second memory is disposed in said casino game console.
0. 22. The casino gaming system as defined in claim 16 wherein the second memory is disposed in a remote location separate from said casino game console.
0. 23. The casino gaming system as defined in claim 16 further comprising a nonvolatile memory operable to store gaming data relating to the play of the casino game.
0. 24. The casino gaming system as defined in claim 23 wherein the nonvolatile memory is disposed in said casino game console.
0. 25. The casino gaming system as defined in claim 23 wherein the nonvolatile memory is disposed in a remote location separate from said casino game console.
0. 26. The casino gaming system as defined in claim 16 wherein the video display unit is disposed in a remote location separate from said casino game console.
0. 27. The casino gaming system as defined in claim 16 further comprising a video subsystem, operatively coupled to the video display unit and operatively coupled to the processor, adapted for displaying still images, motion video or combinations thereof.
0. 28. The casino gaming system as defined in claim 16 wherein the processor is operable to generate a game play of a plurality of different casino games.
0. 29. The casino gaming system as defined in claim 16 wherein in response to receiving a selection of a particular casino game from a plurality of different casino games, the casino gaming apparatus is operable to generate a play of the particular casino game on the casino gaming apparatus.
0. 30. The casino gaming system as defined in claim 16 wherein in response to receiving a selection of a particular casino game from a plurality of different casino games, the casino gaming apparatus is operable to transfer gaming data relating to the particular casino game from the remote memory to the casino gaming apparatus.
0. 31. The casino gaming system as defined in claim 16 further comprising a sound-generating apparatus operatively coupled to the processor.
0. 32. The casino gaming system as defined in claim 16 wherein the network interface is designed to provide a wired connection or a wireless connection to a network.
0. 33. The casino gaming system as defined in claim 16 wherein the network comprises a wired link, a wireless link or combinations thereof.
0. 35. The casino gaming system as defined in claim 34 wherein said disk memory comprises an optical disk.
0. 36. The casino gaming system as defined in claim 34 further comprising at least one peripheral device coupled to the gaming console including a memory device wherein the processor is operable to authenticate contents of the memory device.
0. 37. The casino gaming system as defined in claim 34 wherein said disk memory comprises a magnetic hard disk.
0. 38. The casino gaming system as defined in claim 34 wherein said disk memory is operable as a read-only memory.
0. 39. The casino gaming system as defined in claim 34 wherein the disk memory is disposed in said casino game console.
0. 40. The casino gaming system as defined in claim 34 wherein the disk memory is disposed in a remote location separate from said casino game console.
0. 41. The casino gaming system as defined in claim 34 further comprising a nonvolatile memory operable to store gaming data relating to the play of the casino game.
0. 42. The casino gaming system as defined in claim 41 wherein the nonvolatile memory is disposed in said casino game console.
0. 43. The casino gaming system as defined in claim 41 wherein the nonvolatile memory is disposed in a remote location separate from said casino game console.
0. 44. The casino gaming system as defined in claim 34 wherein the video display unit is disposed in a remote location separate from said casino game console.
0. 45. The casino gaming system as defined in claim 34 further comprising a video subsystem, operatively coupled to the video display unit and operatively coupled to the processor, adapted for displaying still images, motion video or combinations thereof.
0. 46. The casino gaming system as defined in claim 34 wherein the processor is operable to generate a game play of a plurality of different casino games.
0. 47. The casino gaming system as defined in claim 34 wherein in response to receiving a selection of a particular casino game from a plurality of different casino games, the casino gaming apparatus is operable to generate a play of the particular casino game on the casino gaming apparatus.
0. 48. The casino gaming system as defined in claim 34 wherein in response to receiving a selection of a particular casino game from a plurality of different casino games, the casino gaming apparatus is operable to transfer gaming data relating to the particular casino game from the remote memory to the casino gaming apparatus.
0. 49. The casino gaming system as defined in claim 34 further comprising a sound-generating apparatus operatively coupled to the processor.
0. 50. The casino gaming system as defined in claim 34 wherein the network interface is designed to provide a wired connection or a wireless connection to a network.
0. 51. The casino gaming system as defined in claim 34 wherein the network comprises a wired link, a wireless link or combinations thereof.
0. 53. The casino gaming system as defined in claim 52 wherein said second memory comprises an optical disk.
0. 54. The casino gaming system as defined in claim 52 wherein said second memory comprises a magnetic hard disk.
0. 55. The casino gaming system as defined in claim 52 wherein said second memory is operable as a read-only memory.
0. 56. The casino gaming system as defined in claim 52 wherein the second memory is disposed in said casino game console.
0. 57. The casino gaming system as defined in claim 52 wherein the second memory is disposed in a remote location separate from said casino game console.
0. 58. The casino gaming system as defined in claim 52 further comprising a nonvolatile memory operable to store gaming data relating to the play of the casino game.
0. 59. The casino gaming system as defined in claim 58 wherein the nonvolatile memory is disposed in said casino game console.
0. 60. The casino gaming system as defined in claim 58 wherein the nonvolatile memory is disposed in a remote location separate from said casino game console.
0. 61. The casino gaming system as defined in claim 52 wherein the video display unit is disposed in a remote location separate from said casino game console.
0. 62. The casino gaming system as defined in claim 52 further comprising a video subsystem, operatively coupled to the video display unit and operatively coupled to the processor, adapted for displaying still images, motion video or combinations thereof.
0. 63. The casino gaming system as defined in claim 52 wherein the processor is operable to generate a game play of a plurality of different casino games.
0. 64. The casino gaming system as defined in claim 52 wherein in response to receiving a selection of a particular casino game from a plurality of different casino games, the casino gaming apparatus is operable to generate a play of the particular casino game on the casino gaming apparatus.
0. 65. The casino gaming system as defined in claim 52 wherein in response to receiving a selection of a particular casino game from a plurality of different casino games, the casino gaming apparatus is operable to transfer gaming data relating to the particular casino game from the remote memory to the casino gaming apparatus.
0. 66. The casino gaming system as defined in claim 52 further comprising a sound-generating apparatus operatively coupled to the processor.
0. 67. The casino gaming system as defined in claim 52 wherein the network interface is designed to provide a wired connection or a wireless connection to a network.
0. 68. The casino gaming system as defined in claim 52 wherein the network comprises a wired link, a wireless link or combinations thereof.
0. 70. The casino gaming system as defined in claim 69 wherein said second memory comprises an optical disk.
0. 71. The casino gaming system as defined in claim 69 further comprising at least one peripheral device coupled to the gaming console including a memory device wherein the processor is operable to authenticate contents of the memory device.
0. 72. The casino gaming system as defined in claim 69 wherein said second memory comprises a magnetic hard disk.
0. 73. The casino gaming system as defined in claim 69 wherein said second memory is operable as a read-only memory.
0. 74. The casino gaming system as defined in claim 69 wherein the second memory is disposed in said casino game console.
0. 75. The casino gaming system as defined in claim 69 wherein the second memory is disposed in a remote location separate from said casino game console.
0. 76. The casino gaming system as defined in claim 69 further comprising a nonvolatile memory operable to store gaming data relating to the play of the casino game.
0. 77. The casino gaming system as defined in claim 76 wherein the nonvolatile memory is disposed in said casino game console.
0. 78. The casino gaming system as defined in claim 76 wherein the nonvolatile memory is disposed in a remote location separate from said casino game console.
0. 79. The casino gaming system as defined in claim 69 wherein the video display unit is disposed in a remote location separate from said casino game console.
0. 80. The casino gaming system as defined in claim 69 further comprising a video subsystem, operatively coupled to the video display unit and operatively coupled to the processor, adapted for displaying still images, motion video or combinations thereof.
0. 81. The casino gaming system as defined in claim 69 wherein the processor is operable to generate a game play of a plurality of different casino games.
0. 82. The casino gaming system as defined in claim 69 wherein in response to receiving a selection of a particular casino game from a plurality of different casino games, the casino gaming apparatus is operable to generate a play of the particular casino game on the casino gaming apparatus.
0. 83. The casino gaming system as defined in claim 69 wherein in response to receiving a selection of a particular casino game from a plurality of different casino games, the casino gaming apparatus is operable to transfer gaming data relating to the particular casino game from the remote memory to the casino gaming apparatus.
0. 84. The casino gaming system as defined in claim 69 further comprising a sound-generating apparatus operatively coupled to the processor.
0. 85. The casino gaming system as defined in claim 69 wherein the network interface is designed to provide a wired connection or a wireless connection to a network.
0. 86. The casino gaming system as defined in claim 69 wherein the network comprises a wired link, a wireless link or combinations thereof.
0. 87. The casino gaming system as defined in claim 69 wherein the second remote memory location is controlled by a regulatory body.
0. 88. The casino gaming system as defined in claim 69 wherein the regulatory body is a gaming commission.
0. 89. The casino gaming system as defined in claim 69 wherein the second remote memory is controlled by a gaming machine operator.
0. 91. The casino gaming system as defined in claim 69 wherein said second memory comprises an optical disk.
0. 92. The casino gaming system as defined in claim 69 further comprising at least one peripheral device coupled to the gaming console including a memory device wherein the processor is operable to authenticate contents of the memory device.
0. 93. The casino gaming system as defined in claim 69 wherein said second memory comprises a magnetic hard disk.
0. 94. The casino gaming system as defined in claim 69 wherein said second memory is operable as a read-only memory.
0. 95. The casino gaming system as defined in claim 69 wherein the second memory is disposed in said casino game console.
0. 96. The casino gaming system as defined in claim 69 wherein the second memory is disposed in a remote location separate from said casino game console.
0. 97. The casino gaming system as defined in claim 69 further comprising a nonvolatile memory operable to store gaming data relating to the play of the casino game.
0. 98. The casino gaming system as defined in claim 97 wherein the nonvolatile memory is disposed in said casino game console.
0. 99. The casino gaming system as defined in claim 97 wherein the nonvolatile memory is disposed in a remote location separate from said casino game console.
0. 100. The casino gaming system as defined in claim 90 wherein the video display unit is disposed in a remote location separate from said casino game console.
0. 101. The casino gaming system as defined in claim 90 further comprising a video subsystem, operatively coupled to the video display unit and operatively coupled to the processor, adapted for displaying still images, motion video or combinations thereof.
0. 102. The casino gaming system as defined in claim 90 wherein the processor is operable to generate a game play of a plurality of different casino games.
0. 103. The casino gaming system as defined in claim 90 wherein in response to receiving a selection of a particular casino game from a plurality of different casino games, the casino gaming apparatus is operable to generate a play of the particular casino game on the casino gaming apparatus.
0. 104. The casino gaming system as defined in claim 90 wherein in response to receiving a selection of a particular casino game from a plurality of different casino games, the casino gaming apparatus is operable to transfer gaming data relating to the particular casino game from the remote memory to the casino gaming apparatus.
0. 105. The casino gaming system as defined in claim 90 further comprising a sound-generating apparatus operatively coupled to the processor.
0. 106. The casino gaming system as defined in claim 90 wherein the network interface is designed to provide a wired connection or a wireless connection to a network.
0. 107. The casino gaming system as defined in claim 90 wherein the network comprises a wired link, a wireless link or combinations thereof.
0. 108. The casino gaming system as defined in claim 90 wherein the second remote memory location is controlled by a regulatory body.
0. 109. The casino gaming system as defined in claim 90 wherein the regulatory body is a gaming commission.
0. 110. The casino gaming system as defined in claim 90 wherein the second remote memory is controlled by a gaming machine operator.
0. 111. The casino gaming system as defined in claim 90 further comprising a fourth memory disposed in said casino game console and coupled to said processor wherein the fourth memory stores a boot code for the gaming apparatus.
0. 112. The casino gaming system as defined in claim 90 wherein the fourth memory is an unalterable memory separate from the first memory, the second memory and the third memory.
0. 113. The casino gaming system as defined in claim 90 wherein the fourth memory is designed or configured to prevent a bypassing of authentication routine used to the authenticate, operating system, the first gaming data and the second gaming data.
0. 114. The casino gaming system as defined in claim 90 wherein the fourth memory stores a secure loader program.

In one aspect, the invention is directed to a casino gaming apparatus, comprising: a casino gaming system; a remote memory disposed in a location remote from said casino gaming system, said remote memory having gaming data disposed therein; and a data link that operatively couples said remote memory to said casino gaming system, said casino gaming system comprising: a casino game console; a video display unit; a memory disposed in said casino game console; a processor disposed in said casino game console and being operatively coupled to said video display unit and said memory of said casino gaming system, said processor causing said gaming data to be checked after said gaming data has been transferred from said remote memory to said memory of said casino gaming system via said data link, and said processor causing said gaming data to be checked based on a comparison of data generated from said gaming data being checked with previously generated data to determine if said gaming data being checked has been corrupted.

In another aspect, the invention is directed to a casino gaming apparatus, comprising: a casino gaming system; a remote memory disposed in a location remote from said casino gaming system, said remote memory having gaming data relating to a casino game stored therein; and a data link that operatively couples said remote memory to said casino gaming system, said casino gaming system comprising: a casino game console; a video display unit; a memory disposed in said casino game console; a processor disposed in said casino game console and being operatively coupled to said video display unit and said memory of said casino gaming system, said processor causing said gaming data to be authenticated after said gaming data has been transferred from said remote memory to said memory of said casino gaming system via said data link, said processor causing said gaming data to be authenticated based on comparison of a message digest generated by performing a one-way hash function on said gaming data with a message digest previously generated by performing a one-way has function on known gaming data, each of said one-way has functions producing a fixed-size string of bits, and said processor causing a remedial action to be taken if said gaming data transferred from said remote memory to said memory of said casino gaming system is not authentic as determined by said processor.

Other aspects of the invention are defined by the claims set forth at the end of this patent.

FIG. 1 is a block diagram of a system incorporating the invention;

FIG. 2 is a schematic diagram illustrating the contents of the read only memory and the mass storage device;

FIG. 3 is a more detailed schematic view of the authentication program stored in the ROM and the game data stored in the mass storage unit;

FIG. 4 is a diagram illustrating the preparation of the game data set;

FIG. 5 is a diagram illustrating the authentication procedure for the game data set; and

FIG. 6 is a diagram illustrating an alternative approach to the secure loading of software into the system.

Turning now to the drawings, FIG. 1 is a block diagram of an electronic casino gaming system incorporating the invention. As seen in this figure, the system consists of several system components under software control. These system components include a microprocessor 12, which may comprise any general purpose microprocessor, such as a Pentium-based microprocessor from Intel Corporation. A main memory unit 13 is provided, which is typically a random access memory having a capacity of between 32 and 64 megabytes for storing the majority of programs and graphics elements during game play. A system boot ROM 14 provides the initialization software required when power is first applied to the system. ROM 14 contains additional programs in read only form, including the operating system, related drivers and the authentication software described in detail below. A non-volatile RAM 17 is a battery based static RAM capable of maintaining its contents through power cycling. NV RAM 17 stores significant information relating to game play, such as the number of player credits, the last game outcome and certain diagnostic and error information not critical to an understanding of the invention.

A mass storage unit implemented in the FIG. 1 system as a magnetic hard disk drive unit 18 is coupled to and controlled by a disk software 19 of conventional design and operation. Disk drive unit 18 provides storage for the game specific data set, which includes both program data and image data specifying the rules of the various different casino games or single casino game variations, and the types of images and image sequences to be displayed to the game players. The size of the disk drive unit 18 is a function of the number of games and game variations provides for a given system, as well as the amount of data required for each specific game. In general, the more motion video designed into a particular casino game, the more storage required for that casino game software. A disk drive unit 18 with a 4-gigabyte capacity will usually provide sufficient storage capacity. Disk subsystem 19 comprises a disk controller connected to a PCI bus 20 for controlling the disk drive unit 18. Controller 19 preferably supports SCSI-2, with options of fast and wide. It should be noted that a number of different types of locally-based disk drive units may be used in the FIG. 1 system, including a CD-ROM storage unit. Also, the mass storage unit need not be physically located within the game, console along with the other elements depicted in FIG. 1: the mass storage unit may be located remotely from the game console and coupled thereto by means of an appropriate network, such as an ethernet, an R5232 link, or some other hard-wired or wireless network. This latter alternate arrangement is indicated by the inclusion of a network subsystem 21 of appropriate configuration and functional characteristics, which may have ethernet, R5232 serial, or other network compatibility.

A video subsystem 22 is coupled to the PCI bus and provides the capability of displaying full color still images and MPEG movies with a relatively high frame rate (e.g. 30 frames per second) on an appropriate monitor (not shown). Optional 3D texture mapping may be added to this system, if desired.

A sound subsystem 23 having a stereo sound playback capability with up to 16 bit CD quality sound is coupled to an ISA bus 24. A general purpose input/output unit 25 provides interfaces to the game mechanical devices (not illustrated) such as manually actuatable switches and display lights. A first bridge circuit 27 provides an interface between microprocessor 12, ROM 14, main memory 13 and PCI bus 20. Bridge circuit 27 is preferably a TRITON chip set available from INTEL Corporation. A second bridge circuit 28 provides an interface between the PCI bus 20 and the ISA bus 24. Bridge circuit 28 is preferably a type 82378 chip available from Intel Corporation.

FIG. 2 illustrates the types of information stored in the system ROM 14 and the mass storage unit. As seen in FIG. 2, the ROM unit 14 used in the FIG. 1 system comprises two separate ROM elements: ROM 29 and ROM 30. ROM 29 must be an unalterable device, such as a Toshiba type C53400 512K×8 bit mask programmed ROM. ROM 30 is preferably an unalterable device like ROM 29, but may comprise a different type of ROM, such as a type 29FO40 field programmable flash ROM available from Intel Corp. ROM 29 contains the system initialization or boot code, an authentication program, a random number generator program and an initial portion of the executive/loader programs. ROM 30 contains the operating system program, the system drivers and the remainder of the executive/loader programs as noted below. The mass storage unit contains the applications, which include the game image and sound data, rules of game play and the like, and the signature associated to each particular casino game.

FIG. 3 illustrates the authentication and application program information in more detail. As seen in this figure, the authentication program stored in unalterable ROM 29 comprises a message digest algorithm component 32, a decryption algorithm component 33, and a decryption key component 34. The message digest algorithm component 32 stored in ROM 29 comprises an exact copy of a hash function program routine used to originally compute a message digest from the loadable game data set 36 in the member described below. The decryption algorithm component 33 stored in ROM 29 comprises the algorithm required to decrypt an encrypted casino game data set signature using the decryption key component 34.

The decryption key component 34 comprises the decryption key that is required to decrypt any of the encrypted signatures 37 in the manner described below during the authentication routine.

FIG. 4 illustrates the manner in which an encrypted data set signature 37 is generated. A loadable casino game data set 36 is processed using a hash function 41 to generate a message digest 42 which is unique to the loadable game data set 36. The hash function employed may be one of a number of known has functions, such as MD2, MD4, and MD5 hash functions and the SHS hash function; or any other suitable has function capable of producing a unique abbreviated bit string from a variable size input data set. For further information about these hash functions, reference should be had to the publication entitled “Answers To Frequently Asked Questions About Today's Cryptography”, Revision 2.0, Oct. 5, 1993, published by RSA Laboratories, Redwood City, Calif., and the publications listed in the references section thereof, the disclosures of which are hereby incorporated by reference. After generation, the message digest 42 is then encrypted with an encryption algorithm 43 using a private encyrption key 44 to generate a signature 37 of the message digest. In the preferred embodiment, the two-key (private/public key) encyrption technique developed by RSA Data Security, Inc. of Redwood City, Calif. is used. This technique is disclosed and described in U.S. Pat. Nos. 4,200,700, 4,218,582 and 4,405,829, the disclosures of which are hereby incorporated by reference. The signature 37 of the message digest 42 is then stored in the mass storage unit along with the loadable data set 36.

FIG. 5 illustrates the authentication routine carried out in accordance with the invention, when the authentication routine is called (see below), the loadable casino game data set 36 is transferred from the mass storage unit to main memory 13 (unless already there), and the message digest of casino game data set 36 is computed using the message digest algorithm 32. Message digest algorithm 32 uses the same hash function 41 as that used by the manufacturer to prepare the original message digest 42. The result is an unencrypted version 46 of the message digest computed from the casino game data set 36 currently present in the mass storage unit. The encrypted data set signature 37 is decrypted using the public decryption key 34 matching the private key 44 used to originally encrypt the message digest 42 of the casino game data set 36. The message digest 47 decrypted with decryption key 34 is then compared with the message digest 46 computed form the casino game data set 36. If the two message digest match, then the casino game data set 36 is disposed authentic and game play may proceed. If there is no match, either the casino game data set 36 or the signature 37 is deemed corrupted and not authentic. Game play is prohibited and appropriate actions can be taken: e.g. alerting a security employee using a suitable meassaging system (an audible alarm, flashing lights, or a network message from the game console to a central security area).

In order to ensure that the authentication routine cannot be bypassed by tampering with the loader program stored in ROM 30, an initial part of the loader program is incorporated into unalterable ROM 29. This initial portion of the loader program requires that the authentication program be called prior to the initiation of any casino game play. Since this initial portion of the loader program is located in the unalterable ROM 29, and since no casino game play can occur until the particular casino game application data set 36 is loaded into main memory 13, the authentication procedure cannot be bypassed by tampering with the software stored in ROM 30.

Since authentication of the game data set 36 and signature 37 is entrusted to the contents of ROM 29, a procedure must be provided to verify the ROM 29 contents. For this purpose, a message digest is computed for the authentication program stored in ROM 29, and this message digest is stored in a secure manner with the casino operator or the gaming commission (or both) along with the hash function used to produce the message digest. This hash function may be the same hash function used to compute the message digest 42 of the casino game data set or a different hash function. In this way, the authenticity of the ROM 29 can be easily checked in the same way as that now performed in prior art devices: vis. computing the message digest directly from the ROM 29 and comparing the message digest thus computed with the custodial version of the message digest. If required by a given gaming commission or deemed desirably by a casino operator, the system may also display the message digest 42 of each particular data set 36 or the encrypted signature version 37 for auditing purposes. In addition, the system may transmit this information via networking subsystem 21 to an on-site or off-site remote location (such as the office of the gaming commissions). The message digest displayed or transmitted may comprise the decrypted version or the compute version (or both).

The authentication procedure carried out by means of the message digest program 32, decryption program 33 and decryption key 34 stored in unalterable ROM 29 in the manner described above is also used to authenticate the contents of all memory devices in the FIG. 1 system, such as the contents of ROM 30 (see FIG. 2), the fixed data portions and program components stored in NV RAM 17 and the program and fixed data contents of any memory devices stored in the networking subsystem 21, video subsystem 22, sound subsystem 23, PCI-ISA interface 24, and GIP unit 25. Each program or fixed data set stored in any memory device in any of these units has an associated signature, which is encrypted from a message digest of the original program or fixed data set using a hash function, which is preferably the same hash function used to prepare the message digest of the casino game data set. Prior to permitting any such program or fixed data set to participate in the system operation, that program or fixed data set is subjected to the authorization procedure to ensure that the message or fixed data set matches the message digest decrypted from the encrypted signature associated to the program or fixed data set. In addition, the authentication procedure can be run on each such program or fixed data set at period or random intervals (on demand) in a manner essentially identical to that described above with respect to the casino game data set authentication procedure. As a consequence, the integrity of all software in the system is checked prior to the use of that particular software in order to reveal any unauthorized changes to the software portion of the casino gaming system.

An alternative approach to the secure loading of software into the system is depicted in FIG. 6. In this embodiment the basic input/output system (BIOS) software is stored in a ROM 50, the first of two ROMs making up the system boot ROM 14 (FIG. 1). The boot strap code, operating system code (OS), drivers and a secure loader are stored in a second ROM 52. An anchor application 54 including graphics and sound drivers, system drivers, money-handling software, a second secure loader, and a signature is stored in the mass storage 18 (FIG. 1).

When power is initially applied to the system on start-up, or when the system experiences a warm restart, the CPU 12 will begin executing code from the BISO ROM 50. The BIOS is responsible for initializing the motherboard and peripheral cards of the system. After BIOS has completed the initialization, it jumps to the boot strap code in ROM 252 causing the boot strap to copy the OS, OS drivers, and the secure loader into RAM.

Once in the RAM, the OS is started and the secure loader stored in ROM 52 is used to load the anchor application 54 from disk 18. On disk, the anchor application has a signature that is used during the load to verify the validity of the anchor application.

After the anchor application 54 is started, it will be used to load all other applications. The secure loader of the anchor application will check the validity of an application to be loaded by computing the signature and comparing it against the one stored on disk with the application as described above.

An important advantage of the invention not found in 20 prior art systems is the manner in which the casino game data set can be authenticated. In prior art systems, authentication of the casino game data set is normally only done when a payout lying above a given threshold is required by the outcome of the game play, and this requires that the game be disabled while the ROM is physically removed and the ROM contents are verified. In systems incorporating the invention, the authenticity of a given casino game data set can be checked in a variety of ways. For example, the game data set 36 can be automatically subjected to the authentication procedure illustrated in FIG. 5 each time the game is loaded from the mass storage unit into the main memory 13. Thus, as a player selects a casino game for game play in the system, the authenticity of the game actually stored in the mass storage unit is automatically checked using the authentication procedure described above without removing the ROM 29. Further, if desired, the authentication procedure may be initialized in response to the pull of a slot game handle, the detection of a coin insert, the payout of coins or issuing of credit, or any other detectable event related to game play. The authenticity of a given casino game data set 36 can also be checked on demand, either locally at the game console or remotely via a network, by providing a demand procedure. Such a procedure may be initiated, e.g. by providing a manually operable switch in the game console, accessible only to authorized persons, for initiating the authentication routine. Alternatively, the FIG. 1 system may be configured to respond to a demand command generated remotely (e.g., in a security area in the casino or off-site) and transmitted to the game console over a network to the networking subsystem 21.

Another advantage of the invention lies in the fact that the game data set storage capacity of a system incorporating the invention is not limited by the size of a ROM, but is rather dictated by the size of the mass storage unit. As a consequence, games using high resolution, high motion video and high quality stereo sound can be designed and played on systems incorporating the invention. Also, since the mass storage unit need not be a read-only device, and need not be physically located in the game console, the invention affords great flexibility in game content, scheduling and changes. For example, to change the graphic images in a particular casino game or set of games, new casino game data sets can be generated along with new signatures and stored in the mass storage unit by either exchanging disk drives, replacing disks (for read only disk units), or writing new data to the media. In the networked mass storage application, these changes can be made to the files controlled by the network file server. Since the casino game data sets must pass the authentication procedure test, either periodically or on demand, corrupted data sets cannot go undetected. Thus the invention opens up the field of electronic casino gaming systems to readily modifiable games with flexible displays and rules, without sacrificing the essential security of such systems. In fact, security is greatly enhanced by the ability of the invention to authenticate all game data sets both regularly (for each handle pull) and at any time (on demand), without interfering with regular game play (unless no match occurs between the two forms of message digest).

While the above provides a full and complete disclosure of the preferred embodiments of the invention, various modifications, alternate constructions and equivalents may be employed without departing from the true spirit and scope of the invention. For example, while the RSA public/private key encryption technique is preferred (due to the known advantages of this technique), a single, private key encryption technique may be employed, if desired. In a system using this technique, the single key would be stored in ROM 29 in place of the public key 34. Also, the message digest 42 and signature 37 for a given application 36 need not be computed form the entire casino game data set. For example, for some casino games it may be desirable to provide a fixed set of rules while permitting future changes in the casino game graphics, should or both. For such casino games, it may be sufficient to compute the message digest 42 and signature 37 from only the rules portion of the applications program 36. In other cases, it may be desirable or convenient to maintain the casino game video and audio portions constant, while allowing future changes to the rules of game play. For casino games of this category, the message digest 42 and signature 37 may be computed from the graphics and sound portions of the application program 36. It may also be desirable to compute a message digest 42 and signature 37 from a subset of the rules, graphics or sound portions of a given applications program 36, or from some other subset taken from a given applications program 36. Therefore, the above should not be construed as limiting the scope of the invention, which is defined by the appended claims.

Alcorn, Allan E., Barnett, Michael, Giacalone, Jr., Louis D., Levinthal, Adam E.

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