Authentication mechanism integrated with random access memory and method of use

• US 20040078536A1
• Filed: 07/28/2003
• Published: 04/22/2004
• Est. Priority Date: 10/22/2002
• Status: Abandoned Application

• Current Assignee: Tai-Ming Chen
• Original Assignee: Tai-Ming Chen
• Inventors: Chen, Tai-Ming
• Application Number:
  US10/630,507
• Publication Number:
  US 20040078536A1
• Time in Patent Office: Days
• US Class Current: 711/164
• CPC Class Codes: G06F 12/1466 Key-lock mechanism
• CPC Class Codes: G06F 21/71 to assure secure computing or processing of information
• CPC Class Codes: G06F 21/79 in semiconductor storage media, e.g. directly-addressable memories
• CPC Class Codes: G06F 2221/2129 Authenticate client device independently of the user

Abstract

A method for authentication in a computer system, includes, while booting the system checking if a memory section is written and if so, allocating the memory section to memory function until finding a memory section that is not written, and then verifying device identification, and if no match is found, halting the system. The method further includes repeat reading to set an incremental input key, and if the key cannot be altered, halting the system. The method finally includes verifying authentication return keys, and if the verify fails, halting the system, while if verification is made, continuing to boot the system.

Claims

1. A method for authentication in a computer system, the method comprising the steps of:

bringing the computer system out of reset;

checking if a memory section is written and if so, allocating the memory section to memory function;

verifying device identification if the memory section is not written, and if no match is found, halt the system;

repeat read to set an incremental input key, and if the key cannot be altered, halt the system;

verify authentication return keys, and if the verify fails, halt the system; and

continue to bring the computer system out of reset.

2. The method of claim 1 further comprising the step of reading of incremental authentication input keys and authentication return keys.

3. The method of claim 1 further comprising the step of using the first eight bytes of each memory section to provide device identification.

4. The method of claim 3 further comprising the step of using part of the identification as a fixed value as long as a section is serving the authentication function.

5. The method of claim 1 further comprising the step of reading a first field of each section to ensure that the section is serving the authentication function.

6. The method of claim 1 further comprising the step of reading a second field as an incremental authentication input key.

7. The method of claim 6 further comprising the step of incrementing the contents of the second field every time it is read.

8. The method of claim 7 further comprising the step enabling the CPU to set the value of the second field by reading it a specified number of times.

9. The method of claim 8 further comprising the step using the value of the second field to calculate values of the authentication keys.

10. The method of claim 1 further comprising the step of obsolescing the authentication keys when an attempt to defeat the system is made by placing a copy of known authentication keys in memory.

11. In a computer system, a random access memory device comprising:

a plurality of memory cells arranged in sections, including a first section containing a manufacturer identification fixed when the computer system is in an authentication mode;

a second read incremental section incrementing at each read of a central processor unit of the computer system; and

an authentication return keys third section including a secret authentication key.