CA2004485A1 - Computer with improved keyboard password functions - Google Patents

Computer with improved keyboard password functions

Info

Publication number
CA2004485A1
CA2004485A1 CA2004485A CA2004485A CA2004485A1 CA 2004485 A1 CA2004485 A1 CA 2004485A1 CA 2004485 A CA2004485 A CA 2004485A CA 2004485 A CA2004485 A CA 2004485A CA 2004485 A1 CA2004485 A1 CA 2004485A1
Authority
CA
Canada
Prior art keywords
computer
improved
auxiliary device
controller
computer system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2004485A
Other languages
French (fr)
Other versions
CA2004485C (en
Inventor
Roger A. Kaiser, Jr.
James H. Nuckols
Theodore F. Emerson
Gary L. Brasher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Compaq Computer Corp
Original Assignee
Compaq Computer Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=23189615&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2004485(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Compaq Computer Corp filed Critical Compaq Computer Corp
Publication of CA2004485A1 publication Critical patent/CA2004485A1/en
Application granted granted Critical
Publication of CA2004485C publication Critical patent/CA2004485C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
    • G06F21/82—Protecting input, output or interconnection devices
    • G06F21/85—Protecting input, output or interconnection devices interconnection devices, e.g. bus-connected or in-line devices

Abstract

A computer having an improved keyboard/auxiliary device interface controller which supports the selective restriction of user interaction with the computer system, while maintaining the full internal functionality of the host/peripheral interface. A "password lock mode" of the improved controller prevents users from gaining unauthorized access to the computer system, but still application and operating system software can continue to issue commands to and receive responses from the otherwise disabled peripheral devices. The improved controller does not require modification to the conventional keyboard/auxiliary device hardware.
CA002004485A 1989-02-07 1989-12-04 Computer with improved keyboard password functions Expired - Lifetime CA2004485C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/307,404 US4942606A (en) 1989-02-07 1989-02-07 Computer with improved keyboard password functions
US307,404 1989-02-07

Publications (2)

Publication Number Publication Date
CA2004485A1 true CA2004485A1 (en) 1990-08-07
CA2004485C CA2004485C (en) 2000-02-29

Family

ID=23189615

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002004485A Expired - Lifetime CA2004485C (en) 1989-02-07 1989-12-04 Computer with improved keyboard password functions

Country Status (4)

Country Link
US (1) US4942606A (en)
EP (1) EP0382470B1 (en)
CA (1) CA2004485C (en)
DE (1) DE69032254T2 (en)

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US5576982A (en) * 1994-10-17 1996-11-19 Unisys Corporation Fast significant bit calculator and its application to integer multiplication and division
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US7814532B2 (en) * 2001-05-02 2010-10-12 Lenovo (Singapore) Pte. Ltd. Data processing system and method for password protecting a boot device
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Also Published As

Publication number Publication date
DE69032254T2 (en) 1998-08-27
CA2004485C (en) 2000-02-29
EP0382470B1 (en) 1998-04-22
EP0382470A2 (en) 1990-08-16
DE69032254D1 (en) 1998-05-28
EP0382470A3 (en) 1992-05-06
US4942606A (en) 1990-07-17

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