Apparatus and method for protecting system serial number while allowing motherboard replacement

• US 5,864,664 A
• Filed: 08/30/1996
• Issued: 01/26/1999
• Est. Priority Date: 08/30/1996
• Status: Expired due to Fees

• Current Assignee: Lenovo Singapore Pte Limited (Lenovo Group Ltd.)
• Original Assignee: International Business Machines Corporation
• Inventors: Judice, Darryl Edmond, Capps, Louis Bennie Jr., Iachetta, Richard Nicholas Jr.
• Primary Examiner(s): Beausoliel, Jr., Robert W.
• Assistant Examiner(s): Baderman, Scott T.
• Application Number:
  US08/706,158
• Time in Patent Office: 879 Days
• Field of Search: 395/186, 395/187.01, 395/188.01, 395/490, 395/491, 395/609, 395/282, 395/283, 380/3, 380/4, 380/23, 380/25, 364/464.15
• US Class Current: 726/34
• CPC Class Codes: G06F 11/006 Identification G06F11/2289 takes precedence
• CPC Class Codes: G06F 11/20 using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
• 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 21/73 by creating or determining hardware identification, e.g. serial numbers
• CPC Class Codes: G06F 2207/7219 Countermeasures against side channel or fault attacks

Abstract

The present invention provides a method and apparatus for changing the serial number of a replacement motherboard to that of a malfunctioning motherboard thus ensuring that application software are able to be executed on the workstation without interruption while providing assurances to software vendors that the workstation is permitted to run the application software. In an embodiment of the invention, an uninitialized serial number is stored in memory of the replacement motherboard at manufacture time. Once the replacement board is used to replace a malfunctioning motherboard, the uninitialized serial number is initialized by being replaced with the serial number of the malfunctioning motherboard. After initialization, no changes are permitted. In another embodiment of the invention, the workstation is forced to be rebooted after initialization. Here, however, changes to the initialized serial number will be allowed so long as the workstation has not been rebooted.

Claims

1. An apparatus for storing a serial number into a memory of a motherboard, said serial number allowing a computer system having said motherboard to execute application software, said apparatus comprising:

means for storing an uninitialized serial number in said memory, said uninitialized serial number having a header for allowing said serial number to be replaced;

means for initializing said uninitialized serial number by replacing said uninitialized serial number with said serial number allowing said computer system to execute said software application, said serial number being allowed to be changed multiple times so long as the computer system is not rebooted; and

means for inhibiting replacement of said initialized serial number once the computer system has been rebooted.

2. The apparatus of claim 1 wherein said computer system becomes operational after said uninitialized serial number is initialized if it is rebooted.

3. The apparatus of claim 1 wherein said memory is an EEPROM and said inhibiting means is an EEPROM controller.

4. A method of storing a serial number into a memory of a motherboard, said serial number allowing a computer system having said motherboard to execute application software, said method comprising the steps of:

storing an uninitialized serial number in said memory, said uninitialized serial number having a header for allowing said serial number to be replaced;

initializing said uninitialized serial number by replacing said uninitialized serial number with said serial number allowing said computer system to execute said software application, said serial number being allowed to be changed multiple times so long as the computer system is not rebooted; and

inhibiting replacement of said initialized serial number once the computer system has been rebooted.

5. The method of claim 4 wherein said computer system becomes operational after said uninitialized serial number is initialized if it is rebooted.

6. The method of claim 5 wherein said memory is an EEPROM and said step of inhibiting includes using an EEPROM controller.

7. A computer program product stored in memory executable by a processor for storing a serial number into a memory of a motherboard, said serial number allowing a computer system having said motherboard to execute application software, said computer program product comprising:

computer readable program code means for storing an uninitialized serial number in said memory of said motherboard, said uninitialized serial number having a header for allowing said serial number to be replaced;

computer readable program code means for initializing said uninitialized serial number by replacing said uninitialized serial number with said serial number allowing said computer system to execute said software application, said serial number being allowed to be changed multiple times so long as the computer system is not rebooted; and

computer readable program code means for inhibiting replacement of said initialized serial number once the computer system has been rebooted.

8. The computer program product of claim 7 wherein said computer system becomes operational after said uninitialized serial number is initialized if it is rebooted.

9. The computer program product of claim 8 wherein said memory of said motherboard is an EEPROM and said inhibiting means is an EEPROM controller.