US5121345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System and method for protecting integrity of computer data and software
Assignee: Individual
•
Filing: 1990-10-10
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Granted: 1992-06-09
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Expires: 2010-10-10
Abstract
Abstract System and method for preventing alteration of stored data by computer virus. In a computer system which normally automatically boots an operating system when the central processing unit is initialized, a device is provided which takes control of the central processing unit before boot-up, checks the system files for computer virus and generates an alarm signal if a virus is detected. In the preferred embodiment, the device quarantines an infected operating system to prevent alteration.
Inventors
- 👤 Stephen A. Lentz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:30
CPC Classifications
G; G06; G06F; G06F21/00; G06F21/50; G06F21/57; G06F21/575; G06F21/55; G06F21/56; G06F21/567
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
124 words
In a computer system, said system including a central processing unit, a main memory, having resident therein a first program for controlling said central processing unit, a storage memory, having resident therein a second program for interfacing said storage memory with said system, and data and means for sequentially normally automatically transferring said second program to said main memory in response to initializing the central processing unit, and transferring control of said central processing unit to said second program the improvements in said computer system comprising means for sequentially: (a) preventing said transfer of control; (b) checking said program to detect said virus; and (c) generating an alarm signal if said virus is detected, said second program comprising programs/files which are normally automatically booted.
Claim 2
Dependent Claim
124 words
In a computer system, said system including a central processing unit, a main memory, having resident therein a first program for controlling said central processing unit, a storage memory, having resident therein a second program for interfacing said storage memory with said system, and data and means for sequentially normally automatically transferring said second program to said main memory in response to initializing the central processing unit, and transferring control of said central processing unit to said second program the improvements in said computer system comprising means for sequentially: (a) preventing said transfer of control; (b) checking said program to detect said virus; and (c) generating an alarm signal if said virus is detected, said second program comprising programs/files which are normally automatically booted.
Claim 3
Dependent Claim
16 words
An improved computer system of claim 1 in which said second program comprises disk partition data.
Claim 4
Dependent Claim
16 words
An improved computer system of claim 1 in which said second program comprises disk boot data.
Claim 5
Dependent Claim
18 words
An improved computer system of claim 1 in which said second program comprises the storage media operating system.
Claim 6
Dependent Claim
14 words
An improved computer system of claim 1 in which said second program comprises COMMAND.COM.
Claim 7
Dependent Claim
15 words
An improved computer system of claim 1 in which said second program comprises device drivers.
Claim 8
Dependent Claim
14 words
An improved computer system of claim 1 in which said second program comprises AUTOEXEC.BAT.
Claim 9
Dependent Claim
16 words
An improved computer system of claim 1 in which said second program comprises a shell program.
References Cited (Backward Citations)
US4975950A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-06-09 | 1995-12-09 | 1996-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-09 | 1999-12-09 | 2000-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-09 | 2003-12-09 | 2004-06-09 | $7700.00 | Window Closed / Lapsed |