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1. (WO1991017612) METHOD AND MEANS TO LIMIT ACCESS TO COMPUTER SYSTEMS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/017612 International Application No.: PCT/US1991/002267
Publication Date: 14.11.1991 International Filing Date: 04.04.1991
Chapter 2 Demand Filed: 25.11.1991
IPC:
G06F 21/00 (2006.01) ,G06K 7/08 (2006.01) ,G06K 19/12 (2006.01) ,G07F 7/08 (2006.01) ,G07F 7/12 (2006.01)
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
F
ELECTRIC DIGITAL DATA PROCESSING
21
Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
K
RECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
7
Methods or arrangements for sensing record carriers
08
by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
K
RECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
19
Record carriers for use with machines and with at least a part designed to carry digital markings
06
characterised by the kind of the digital marking, e.g. shape, nature, code
08
using markings of different kinds in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means
10
at least one kind of marking being used for authentication, e.g. of credit or identity cards
12
the marking being sensed by magnetic means
G PHYSICS
07
CHECKING-DEVICES
F
COIN-FREED OR LIKE APPARATUS
7
Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
08
by coded identity card or credit card
G PHYSICS
07
CHECKING-DEVICES
F
COIN-FREED OR LIKE APPARATUS
7
Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
08
by coded identity card or credit card
12
Card verification
Applicants:
BIANCO, James, S. [US/US]; US
Inventors:
BIANCO, James, S.; US
MADSEN, James, T.; US
CEPPETELLI, Michael, A.; US
Agent:
CROZIER, John, H.; 1934 Huntington Turnpike Trumbull, CT 06611-5116, US
Priority Data:
520,76309.05.1990US
Title (EN) METHOD AND MEANS TO LIMIT ACCESS TO COMPUTER SYSTEMS
(FR) PROCEDE ET MOYEN PERMETTANT DE LIMITER L'ACCES AUX SYSTEMES INFORMATIQUES
Abstract:
(EN) In a preferred embodiment, a method of limiting access to computer system (12) which method includes scrambling identification card information (24) with time information so that the resulting code can be used for only a limited period of time, thus preventing unauthorized persons from using the code at a later time.
(FR) Dans un mode d'exécution préféré, un procédé permettant de limiter l'accès à un système informatique (12) comprend le brouillage de l'information contenue dans la carte d'identification (24) avec l'information relative au temps, de telle sorte que le code résultant ne peut être utilisé que pendant une durée limitée, ceci évitant par conséquent que des personnes non autorisées utilisent le code à un moment ultérieur.
Designated States: JP
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0527820US5233658