CD-ROM disk and security check method for the same

• US 5,371,792 A
• Filed: 12/21/1993
• Issued: 12/06/1994
• Est. Priority Date: 01/31/1992
• Status: Expired

• Current Assignee: Kabushkuki Kaisha SEGA Enterprises
• Original Assignee: Kabushkuki Kaisha SEGA Enterprises
• Inventors: Kawahori, Masaki, Asai, Toshinori
• Primary Examiner(s): Buczinski, Stephen C.
• Application Number:
  US08/171,756
• Time in Patent Office: 350 Days
• Field of Search: 380/3, 380/4, 380/23, 380/25, 364/DIG. 1, 364/DIG. 2, 364/245.8, 364/246.9, 364/966.4, 369/47
• US Class Current: 705/59
• CPC Class Codes: A63F 2300/201 Playing authorisation given at platform level
• CPC Class Codes: A63F 2300/206 Game information storage, e.g. cartridges, CD ROM's, DVD's, smart cards
• CPC Class Codes: G06F 21/10 Protecting distributed programs or content, e.g. vending or licensing of copyrighted material protection in video systems or pay television H04N7/16 ; Digital rights management [DRM]
• CPC Class Codes: G06F 21/80 in storage media based on magnetic or optical technology, e.g. disks with sectors preventing unauthorised reproduction or copying of disc-type recordable media G11B20/00
• CPC Class Codes: G06F 2211/007 Encryption, En-/decode, En-/decipher, En-/decypher, Scramble, (De-)compress
• CPC Class Codes: G06F 2211/1097 Boot, Start, Initialise, Power
• CPC Class Codes: G06F 2221/2109 Game systems
• CPC Class Codes: G11B 19/10 by sensing presence or absence of record in accessible stored position or on turntable
• CPC Class Codes: G11B 19/12 by sensing distinguishing features of or on records, e.g. diameter end mark
• CPC Class Codes: G11B 20/00086 Circuits for prevention of unauthorised reproduction or copying, e.g. piracy indicating unauthorised use of record carriers in general G11B23/28; scrambling for television signal recording H04N5/913; network architectures or network protocols for network security H04L63/00; cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
• CPC Class Codes: G11B 20/00094 involving measures which result in a restriction to authorised record carriers
• CPC Class Codes: G11B 2220/2545 CDs
• CPC Class Codes: G11B 27/329 on a disc [VTOC]
• CPC Class Codes: G11B 7/0037 with discs
• CPC Class Codes: G11B 7/00745 Sectoring or header formats within a track formats in general G11B20/12
• CPC Class Codes: G11B 7/013 for discrete information, i.e. where each information unit is stored in a distinct discrete location , e.g. digital information formats within a data block or sector

Abstract

A CD-ROM disk comprises an identifier region having a disk identifier recorded in and a security code region having a security code recorded in. The identifier region and the security code region are provided in one sector of a boot sector to be read when actuated. The disk identifier includes a preset identification code, and the security code includes at least a program to be executed after check of the security code, and display data for displaying a license. A security check method for a CD-ROM disk comprising the steps of reading data recorded in the boot sector of the CD-ROM disk when actuated, comparing the disk identifier read from the identifier region of the boot sector with an stored identifier to check whether or not the read disk identifier is correct, comparing the security code read from the security region of the boot sector with a stored security code to check whether or not the read security code is correct, and executing the program contained in the security code when the read disk identifier and the read security code are correct, and displaying a license based on the display data.

Claims

1. A CD-ROM disk to be mounted on a CD-ROM device, said CD-ROM disk comprising an identifier region having a disk identifier recorded therein, and a security code region having a security code recorded therein,

the identifier region and the security code region being provided in one sector of a boot sector to be read when actuated,

the disk identifier including a preset identification code,

the security code including at least a program to be executed after check of the security code.

2. A CD-ROM disk according to claim 1, wherein the program includes:

a first step in which head addresses of data recorded in the CD-ROM disk are set in a register of a first CPU; and

a second step in which a required program routine stored in a CD-ROM device is executed.

3. A CD-ROM disk according to claim 1, wherein the program includes:

a first step in which a second CPU provided in the CD-ROM device is temporarily paused;

a second step in which contents of a program memory of the second CPU are rewritten with data recorded in the CD-ROM disk;

a third step in which operation of the second CPU is resumed;

a forth step in which head addresses of data recorded in the CD-ROM disk are set in a register of a first CPU; and

a fifth step in which a required program routine stored in the CD-ROM device is executed.

4. A CD-ROM disk according to claim 1, wherein the security code includes display data for displaying a license.

5. A CD-ROM disk according to claim 4, wherein the program includes:

a first step in which head addresses of data recorded in the CD-ROM disk are set in a register of a first CPU; and

a second step in which a required program routine stored in the CD-ROM device is executed.

6. A CD-ROM disk according to claim 4, wherein the program includes:

a first step in which a second CPU provided in the CD-ROM device is temporarily paused;

a second step in which contents of a program memory of the second CPU are rewritten with data recorded in the CD-ROM disk;

a third step in which operation of the second CPU is resumed;

a forth step in which head addresses of data recorded in the CD-ROM disk are set in a register of a first CPU; and

a fifth step in which a required program routine stored in the CD-ROM device is executed.

7. A CD-ROM disk according to claim 4, wherein the security code includes a LOGOTYPE data indicative of LOGOTYPE to be displayed.

8. A CD-ROM disk according to claim 7, wherein the program includes:

a first step in which head addresses of data recorded in the CD-ROM disk are set in register of a first CPU; and

a second step in which a required program routine stored in a CD-ROM device is executed.

9. A CD-ROM disk according to claim 7, wherein the program includes:

a first step in which a second CPU provided in the CD-ROM device is temporarily paused;

a second step in which contents of a program memory of the second CPU are rewritten with data recorded in the CD-ROM disk;

a third step in which operation of the second CPU is resumed;

a forth step in which head addresses of data recorded in the CD-ROM disk are set in a register of a first CPU; and

a fifth step in which a required program routine stored in the CD-ROM device is executed.

10. A security check method for a CD-ROM disk to be mounted on a CD-ROM device, said CD-ROM disk including an identifier region having a disk identifier recorded therein and a security code region having a security code recorded therein, the identifier region and the security code region being provided in one sector of a boot sector to be read when actuated, the disk identifier including a present identification code, the security code including at least a program to be executed after check of the security code,

the security check method comprising:

a first step of reading data recorded in a boot sector of the CD-ROM disk when actuated;

a second step of comparing the disk identifier read from the identifier region of the boot sector with a stored identifier to check whether or not the read disk identifier is correct;

a third step of comparing the security code read from the security region of the boot sector with a stored security code to check whether or not the read security code is correct; and

a forth step of executing the program contained in the security code when the read disk identifier and the read security code are correct.

11. A security check method according to claim 10, wherein the forth step includes:

a first step of setting addresses of data recorded in the CD-ROM disk in a register of a first CPU; and

a second step of executing a required program routine stored in a CD-ROM device.

12. A security check method according to claim 10 wherein the forth step includes:

a first step of temporarily pausing a second CPU provided in the CD-ROM device;

a second step of rewriting contents of a program memory of the second CPU with data recorded in the CD-ROM disk;

a third step of resuming operation of the second CPU;

a forth step of setting addresses of data recorded in the CD-ROM disk in a register of a first CPU; and

a fifth step of executing a required program routine stored in the CD-ROM device.

13. A security check method according to claim 10, wherein the security code includes display data for displaying a license and wherein the fourth step includes displaying a license based on the display data.

14. A security check method according to claim 13, wherein the fourth step includes:

a first step of setting addresses of data recorded in the CD-ROM disk in a register of a first CPU; and

a second step of executing a required program routine stored in the CD-ROM device.

15. A security check method according to claim 13, wherein the forth step includes:

a first step of temporarily pausing a second CPU provided in the CD-ROM device;

a second step of rewriting contents of a program memory of the second CPU with data recorded in the CD-ROM disk;

a third step of resuming operation of the second CPU;

a forth step of setting addresses of data recorded in the CD-ROM disk in a register of a first CPU; and

a fifth step of executing a required program routine stored in the CD-ROM device.

16. A security check method according to claim 13, wherein the security code includes a LOGOTYPE data indicative of LOGOTYPE to be displayed, and wherein the forth step includes a step of displaying a LOGOTYPE based on the LOGOTYPE data.

17. A security check method according to claim 16, wherein the forth step includes:

a first step of setting addresses of data recorded in the CD-ROM disk in a register of a first CPU; and

a second step of executing a required program routine stored in a CD-ROM device.

18. A security check method according to claim 16, wherein the forth step includes:

a first step of temporarily pausing a second CPU provided in the CD-ROM device;

a second step of rewriting contents of a program memory of the second CPU with data recorded in the CD-ROM disk;

a third step of resuming operation of the second CPU;

a forth step of setting addresses of data recorded in the CD-ROM disk in a register of a first CPU; and

a fifth step of executing a required program routine stored in the CD-ROM device.

19. A television game device with a CD-ROM device for mounting a CD-ROM disk, said CD-ROM disk including an identifier region having an identifier recorded in and a security code region having a security code recorded in, the identifier region and the security code region being provided in one sector of a boot sector to be read when actuated, the disk identifier including a preset identification code, the security code including at least a program to be executed after check of the security code, the television game device comprising:

an executing means for reading data recorded in said boot sector of the CD-ROM disk when actuated, comparing the disk identifier read from the identifier region of the boot sector with a stored identifier to check whether or not the read disk identifier is correct, and comparing the security code read from the security region of the boot sector with a stored security code to check whether or not the read security code is correct, and for executing said program in the security code when the read disk identifier and the read security code are correct.

20. A television game device according to claim 19, wherein the security code includes display data for displaying a license, and wherein the executing means displays a license based on the display data.

21. A television game device according to claim 19, wherein the security code includes LOGOTYPE data indicative of LOGOTYPE to be displayed, and wherein the executing means displays a LOGOTYPE based on the LOGOTYPE data.

22. A television game device according to claim 19, wherein the executing means sets addresses of data recorded in the CD-ROM disk in a register, and executes a required program routine stored in the CD-ROM device.

23. A television game device according to claim 19, wherein the executing means includes a first CPU and a second CPU, and wherein the second CPU temporarily pauses the first CPU, rewrites contents of a program memory of the first CPU in data recorded in the CD-ROM disk, resumes operation of the first CPU which has been temporarily paused, sets addresses of data recorded in the CD-ROM disk in a register, and executes a required program routine stored in the CD-ROM device.