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 Title: |
US5802592:
System and method for protecting integrity of alterable ROM using digital signatures
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Chess, David M.; Mohegan Lake, NY
Sorkin, Gregory Bret; New York, NY
White, Steve Richard; New York, NY
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| Assignee: |
International Business Machines Corporation, Armonk, NY
other patents from INTERNATIONAL BUSINESS MACHINES CORPORATION (280070) (approx. 44,393)
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| Published / Filed: |
1998-09-01
/ 1996-05-31
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| Application Number: |
US1996000656626
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| IPC Code: |
Advanced:
G06F 9/445;
G06F 11/10;
G06F 21/00;
G06F 1/00;
Core:
more...
IPC-7:
G06F 11/30;
G06F 12/14;
G06F 12/16;
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| ECLA Code: |
G06F9/445B; G06F11/10M2B; G06F21/00N3P1; G06F21/00N9C;
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| U.S. Class: |
Current:
711/164;
711/102;
711/103;
713/002;
713/100;
714/036;
714/038;
714/045;
714/E11.04;
Original:
711/164;
711/102;
711/103;
395/183.12;
395/183.14;
395/183.21;
395/652;
395/633;
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| Field of Search: |
711/102,163,103,164
395/651-653,186,188.01,183.09,183.12,183.14,183.21
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| Priority Number: |
| 1996-05-31 |
US1996000656626 |
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| Abstract: |
A system and method for verifying the integrity of a computer system's BIOS programs stored in alterable read only memory (such as FLASH ROM), and preventing malicious alteration thereof. The system and method regularly check the contents of the alterable read only memory using a digital signature encrypted by means of an asymmetrical key cryptosystem.
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| Attorney, Agent or Firm: |
Perman & Green, LLP ;
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| Primary / Asst. Examiners: |
Chan, Eddie P.; Bragdon, Reginald G.
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| INPADOC Legal Status: |
Show legal status actions
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| Family: |
None
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First Claim:
Show all 28 claims |
We claim:
1. A system, comprising:
- a processor;
- a storage device storing an operating system program for execution on the processor;
- an alterable read only memory for storing data; and
- a corruption detection device for detecting unauthorized changes to data in the alterable read only memory, the corruption detection device reading a signature, encrypted with a private key, that represents a non-corrupted version of data in the alterable read only memory, and further reading, from a secure memory location, a public key for decrypting the signature, the corruption detection device operating to compare the decrypted using public key, signature to a computed signature for detecting an occurrence of an unauthorized change to the data in the alterable read only memory.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
Show description
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| Forward References: |
Show 109 U.S. patent(s) that reference this one
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| Foreign References: |
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| Other References: |
Aarons et al., Security strategies: hardware protection for PCs, PC Magazine, v6, p. 104(12), Apr. 28, 1987.
Rosch, Internal Security: The Growing Mass of Stored PC Data Makes Protecting It a Modern Necessity, PC Week, v2, n18, pp. 89-91, May 7, 1985.
Clark et al., BITS: A smartcard protected operating system, Communications of the ACM, v37, n11, pp. 66-70, Nov. 1994.
Cited by 100 patents
[ISI abstract]
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