EP0261030A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
System for data field area acquisition in IC card for multiple services
Assignee: Fujitsu Ltd
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Filing: 1987-09-15
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Granted: —
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Expires: 2007-09-15
Abstract
Abstract Information indicating the limit of size of area which is permitted to a service provider and an authentication code of the service supplier are stored in an IC card upon issuance. When a service is to be added, a service supplier is authenticated, and thereafter, acquisition of a data field area within a predetermined size of data field area is permitted (through 3 and 4). Thus, in the IC card for multiple services, upon addition of a new service after card issuance, the use of a remainder vacant area in the IC card by an unauthenticated service supplier and the exclusive use of the vacant area by a specific service supplier are prevented.
Inventors
- 👤 Nobuo Ogasawara
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 00:58
CPC Classifications
G; G06; G06K; G06K19/00; G06K19/06; G07; G07F; G07F7/00; G07F7/08; G07F7/10; G07F7/1008; G06F; G06F12/00; G06F12/14; G06F21/00; G06F21/10; G06F21/12; G06F21/121; G06F21/123; G06Q; G06Q20/00; G06Q20/30; G06Q20/34; G06Q20/341; G06Q20/357; G06Q20/3576; G06Q20/35765
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
146 words
A system for data field area acquisition in an IC card for multiple services, said system comprising: a plurality of data fields for storing data; area user identification input means; area user authentication code input means; area size demand input means; area user authentication means; area size calculating means for calculating a remainder area for an authenticated area user; table storage means for storing table for data field control; and data field area acquiring means, calculation of a remainder area for user authenticated by said area user authentication means being carried out based on an input area size demand and information stored in said table storage means; based on the cumulative result of the area user authentication and the calculation of the remainder area for the authenticated area user, acquisition of an additional data field area being carried out within a limit of usable area size.
Claim 2
Independent Claim
146 words
A system for data field area acquisition in an IC card for multiple services, said system comprising: a plurality of data fields for storing data; area user identification input means; area user authentication code input means; area size demand input means; area user authentication means; area size calculating means for calculating a remainder area for an authenticated area user; table storage means for storing table for data field control; and data field area acquiring means, calculation of a remainder area for user authenticated by said area user authentication means being carried out based on an input area size demand and information stored in said table storage means; based on the cumulative result of the area user authentication and the calculation of the remainder area for the authenticated area user, acquisition of an additional data field area being carried out within a limit of usable area size.
Claim 3
Dependent Claim
38 words
A system according to claim 1, wherein said table storage means stores a plurality of area user identifications, area user authentication codes corresponding to the area user identifications, and usable area size information corresponding to each area user.
Claim 4
Dependent Claim
34 words
A system according to claim 1, wherein said area user authentication means is operated based on signals from the area user identification input portion, the authentication code input means, and the table storage means.
Claim 5
Dependent Claim
43 words
A system according to claim 1, wherein said area size calculating means is operated based on the signals from the area user authentication means, the area size demand input means, the table storage means, and the information storage means for respective data fields.
References Cited (Backward Citations)
No citation records indexed.
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