CA2362450A1 - Electronic security technique for gaming software - Google Patents

Electronic security technique for gaming software Download PDF

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Publication number
CA2362450A1
CA2362450A1 CA002362450A CA2362450A CA2362450A1 CA 2362450 A1 CA2362450 A1 CA 2362450A1 CA 002362450 A CA002362450 A CA 002362450A CA 2362450 A CA2362450 A CA 2362450A CA 2362450 A1 CA2362450 A1 CA 2362450A1
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CA
Canada
Prior art keywords
code
live
gaming device
computing
verification code
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002362450A
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French (fr)
Other versions
CA2362450C (en
Inventor
Alec Ginsburg
Darin T. Gifford
Robert J. Piechowiak
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Multimedia Games Inc
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Individual
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Filing date
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Publication of CA2362450A1 publication Critical patent/CA2362450A1/en
Application granted granted Critical
Publication of CA2362450C publication Critical patent/CA2362450C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/60—Protecting data
    • G06F21/64—Protecting data integrity, e.g. using checksums, certificates or signatures
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F17/00—Coin-freed apparatus for hiring articles; Coin-freed facilities or services
    • G07F17/32—Coin-freed apparatus for hiring articles; Coin-freed facilities or services for games, toys, sports, or amusements
    • G07F17/3241—Security aspects of a gaming system, e.g. detecting cheating, device integrity, surveillance
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2221/00—Indexing scheme relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F2221/21—Indexing scheme relating to G06F21/00 and subgroups addressing additional information or applications relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F2221/2109—Game systems

Abstract

A method and apparatus for securing the game program software and related da ta files used by a gaming device and for authenticating such files during game startup and play. In one embodiment of the present invention, a verification code is generated by the manufacturer for each software file and data file used by the game. The verification codes are stored in a non-volatile, tampe r- proof, read-only memory device, which is (in some embodiments) securely attached to the gaming device. On some or every download of the game softwar e and/or related data files into the gaming device, commencement of a game, or on the occurrence of certain pre-defined events, the stored verification cod e is used to validate the game software and data files. In some embodiments, verification is performed automatically on a periodic basis without operator or player action. Verification consists of calculating a live verification code for some or all of the software and data files present in the alterable random access memory using the same method chosen to create the stored verification code. In some embodiments of the present invention, the verification code is the result of a hash function of trusted copies of each software and related data file. If the live code matches the stored code for every suspect file, then operation and play proceeds normally. If, however, one or more codes do not match, an error condition is declared, operation is halted, and notification of the error condition follows.

Claims (40)

1. A method of authenticating a suspect computer file in a gaming device comprising:
computing a verification code for a trusted computer file containing a game program code or a game-related code external to said gaming device;
storing said verification code in an unalterable memory device in said gaming device;
on loading of said suspect computer file into an alterable memory in said gaming device, computing a live code from said suspect computer file in said gaming device;
comparing said live code to said verification code in said gaming device; and permitting operation of said suspect computer file if said live code is equal to said verification code.
2. The method of Claim 1, wherein:
said computing the verification code comprises hashing said trusted computer file; and said computing the live code comprises hashing said suspect computer file.
3. The method of Claim 2, wherein said hashing uses a Panama hash code.
4. The method of Claim 1, wherein said unalterable memory device comprises a read-only memory.
5. The method of Claim 1, further comprising prohibiting play if the live code is not equal to the verification code.
6. The method of Claim 5, further comprising alerting an operator.
7. The method of Claim 1, further comprising:
computing a second live code in said gaming device from said alterable memory on a designated event;
comparing said second live code to said verification code; and permitting operation of said computer file if said second live code is equal to said verification code.
8. The method of Claim 1, further comprising:
computing a second live code in said gaming device from said alterable memory on elapse of a defined time interval;
comparing said second live code to said verification code; and permitting operation of said computer file if said second live code is equal to said verification code.
9. An apparatus for authenticating a suspect computer file in a gaming device, comprising:
circuitry external to said gaming device for computing a verification code for a trusted computer file containing a game program code or a game related code;
an unalterable memory device in said gaming device adapted to being configured by said external circuitry to store said verification code and storing said verification code;
circuitry in said gaming device for computing a live code from said suspect computer file on loading of said suspect computer file into an alterable memory in said gaming device; and circuitry in said gaming device for comparing said live code to said verification code and permitting operation of said suspect computer file if said live code is equal to said verification code.
10. The apparatus of Claim 9, wherein:

said circuitry for computing the verification code hashes said trusted computer file; and said circuitry for computing the live code hashes said suspect computer file.
11. The apparatus of Claim 10, wherein said circuitry for computing said verification code and said circuitry for computing said live code use a Panama hash code.
12. The apparatus of Claim 9, wherein said unalterable memory device comprises a read-only memory.
13. The apparatus of Claim 9 wherein said circuitry for comparing further comprises circuitry prohibiting play if the live code is not equal to the verification rode.
14. The apparatus of Claim 13, wherein said circuitry for comparing further comprises circuitry alerting an operator.
15. The apparatus of Claim 9, further comprising:
circuitry for computing a second live code in said gaming device from said alterable memory on a designated event; and circuitry for comparing said second live code to said verification code stored in said unalterable memory device and permitting operation of said computer file if said second live code is equal to said verification code.
16. The apparatus of Claim 9, further comprising:
circuitry for computing a second live code in said gaming device from said alterable memory on elapse of a defined time interval; and circuitry for comparing said second live code to said verification code stored in said unalterable memory device and permitting operation of said computer file if said second live code is equal to said verification code.
17. A computer system for authenticating a suspect computer file in a gaming device, comprising computer instructions for:
computing a verification code for a trusted computer file containing a game program code or a game-related code external to said gaming device;
storing said verification code in an unalterable memory device in said gaming device;
on loading of said suspect computer file into an alterable memory in said gaming device, computing a live code from said suspect computer file in said gaming device;
comparing said live code to said verification code in said gaming device; and permitting operation of said suspect computer file if said live code is equal to said verification code.
18. The computer system of Claim 17, wherein:
said computing the verification code comprises hashing said trusted computer file; and said computing the live code comprises hashing said suspect computer file.
19. The computer system of Claim 18, wherein said hashing uses a Panama hash code.
20. The computer system of Claim 17, wherein said unalterable memory device comprises a read-only memory.
21. The computer system of Claim 17, further comprising prohibiting play if the live code is not equal to the verification code.
22. The computer system of Claim 21, further comprising alerting an operator.
23. The computer system of Claim 17, further comprising:
computing a second live code in said gaming device from said alterable memory on a designated event;

comparing said second live code to said verification code; and permitting operation of said computer file if said second live code is equal to said verification code.
24. The computer system of Claim 17, further comprising:
computing a second live code in said gaming device from said alterable memory on elapse of a defined time interval;
comparing said second live code to said verification code; and permitting operation of said computer file if said second live code is equal to said verification code.
25. A computer-readable storage medium, comprising computer instructions for:
computing a verification code for a trusted computer file containing a game program code or a game-related code external to said gaming device;
storing said verification code in an unalterable memory device in said gaming device;
on loading of said suspect computer file into an alterable memory in said gaming device, computing a live code from said suspect computer file in said gaming device;
comparing said live code to said verification code in said gaming device; and permitting operation of said suspect computer file if said live code is equal to said verification code.
26. The computer-readable storage medium of Claim 25, wherein:
said computing the verification code comprises hashing said trusted computer file; and said computing the live code comprises hashing said suspect computer file.
27. The computer-readable storage medium of Claim 26, wherein said hashing uses a Panama hash code.
28. The computer-readable storage medium of Claim 25, wherein said unalterable memory device comprises a read-only memory.
29. The computer-readable storage medium of Claim 25, further comprising prohibiting play if the live code is not equal to the verification code.
30. The computer-readable storage medium of Claim 29, further comprising alerting an operator.
31. The computer-readable storage medium of Claim 25, further comprising:
computing a second live code in said gaming device from said alterable memory on a designated event;
comparing said second live code to said verification code; and permitting operation of said computer file if said second live code is equal to said verification code.
32. The computer-readable storage medium of Claim 25, further comprising:
computing a second live code in said gaming device from said alterable memory on elapse of a defined time interval;
comparing said second live code to said verification code; and permitting operation of said computer file if said second live code is equal to said verification code.
33. A computer data signal embodied in a Garner wave, comprising computer instructions for:
computing a verification code for a trusted computer file containing a game program code or a game-related code external to said gaming device;
storing said verification code in an unalterable memory device in said gaming device;

on loading of said suspect computer file into an alterable memory in said gaming device, computing a live code from said suspect computer file in said gaming device;
comparing said live code to said verification code in said gaming device; and permitting operation of said suspect computer file if said live code is equal to said verification code.
34. The computer data signal of Claim 33, wherein:
said computing the verification code comprises hashing said trusted computer file; and said computing the live code comprises hashing said suspect computer file.
35. The computer data signal of Claim 34, wherein said hashing uses a Panama hash code.
36. The computer data signal of Claim 33, wherein said unalterable memory device comprises a read-only memory.
37. The computer data signal of Claim 33, further comprising prohibiting play if the live code is not equal to the verification code.
38. The computer data signal of Claim 37, further comprising alerting an operator.
39. The computer data signal of Claim 33, further comprising:
computing a second live code in said gaming device from said alterable memory on a designated event;
comparing said second live code to said verification code; and permitting operation of said computer file if said second live code is equal to said verification code.
40. The computer data signal of Claim 33, further comprising:
computing a second live code in said gaming device from said alterable memory on elapse of a defined time interval;

comparing said second live code to said verification code; and permitting operation of said computer file if said second live code is equal to said verification code.
CA2362450A 2000-01-04 2000-12-29 Electronic security technique for gaming software Expired - Lifetime CA2362450C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/476,915 US6595856B1 (en) 2000-01-04 2000-01-04 Electronic security technique for gaming software
US09/476,915 2000-01-04
PCT/US2000/035688 WO2001050230A2 (en) 2000-01-04 2000-12-29 Electronic security technique for gaming software

Publications (2)

Publication Number Publication Date
CA2362450A1 true CA2362450A1 (en) 2001-07-12
CA2362450C CA2362450C (en) 2011-03-08

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US (1) US6595856B1 (en)
AU (1) AU782891B2 (en)
CA (1) CA2362450C (en)
WO (1) WO2001050230A2 (en)

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US6595856B1 (en) 2003-07-22
AU2915101A (en) 2001-07-16
WO2001050230A2 (en) 2001-07-12
CA2362450C (en) 2011-03-08
WO2001050230A3 (en) 2002-03-07
AU782891B2 (en) 2005-09-08

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