Patent US5590193A successfully refreshed from Google Patents.
US5590193A
Expired / Lapsed
US
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Method to secure the operations for accessing detachable cards for computers
Assignee: Thales DIS France SA
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Filing: 1995-05-04
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Granted: 1996-12-31
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Expires: 2015-05-04
Abstract
Abstract A method for securing access to detachable cards of the mass storage or I/O type using a password to encipher the address of the configuration register placed in the descriptor of the card, which descriptor is stored in a non-volatile memory of the card. The method prevents a computer from configuring the card unless a correct password is provided.
Inventors
- 👤 Jean-Yves Le Roux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:27
CPC Classifications
G; G06; G06F; G06F21/00; G06F21/70; G06F21/78; G06F21/79; G06F21/71; G06F21/77
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
147 words
A method for securing the accessing of a mass storage type card or input-output function type card connected to a computer, these cards comprising a descriptor designed to contain information elements for recognizing the card and its configuration, enabling the computer to use the card for an application, wherein said method comprises a stage of customization of the card during which at least one information element of the descriptor is enciphered by means of an enciphering function f using a password assigned to one or more authorized users, wherein during subsequent uses the user presents his password and, wherein the operating system of the computer activates a reading of the descriptor and the performance of a function f -1 for the deciphering of the information elements read in the descriptor on the basis of the password entered by the user so as to determine the enciphered information.
Claim 2
Independent Claim
147 words
A method for securing the accessing of a mass storage type card or input-output function type card connected to a computer, these cards comprising a descriptor designed to contain information elements for recognizing the card and its configuration, enabling the computer to use the card for an application, wherein said method comprises a stage of customization of the card during which at least one information element of the descriptor is enciphered by means of an enciphering function f using a password assigned to one or more authorized users, wherein during subsequent uses the user presents his password and, wherein the operating system of the computer activates a reading of the descriptor and the performance of a function f -1 for the deciphering of the information elements read in the descriptor on the basis of the password entered by the user so as to determine the enciphered information.
Claim 3
Dependent Claim
25 words
A securing method according to claim 1, wherein the descriptor comprises fields of general information elements on the card and fields of configuration information elements.
Claim 4
Dependent Claim
41 words
A securing method according to claim 2 wherein, among the fields of configuration information elements, the descriptor comprises a field giving the address at which the configuration data element must be installed and wherein the enciphered information element is this address.
Claim 5
Dependent Claim
19 words
A securing method according to claim 1, wherein the descriptor of the card is stored in a non-volatile memory.
Claim 6
Dependent Claim
16 words
A securing method according to claim 4, wherein the memory is an electrically erasable memory (EEPROM).
Claim 7
Dependent Claim
17 words
A securing method according to claim 1, wherein the cards are mass storage cards and/or input/output cards.
Claim 8
Dependent Claim
16 words
A securing method according to claim 1, wherein the cards are cards meeting the PCMCIA standard.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-12-31 | 2000-07-01 | 2000-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-12-31 | 2004-07-01 | 2004-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-12-31 | 2008-07-01 | 2008-12-31 | $7700.00 | Window Closed / Lapsed |