EP0286094A2
Expired / Lapsed
EP
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IC Card system
Assignee: Casio Computer Co Ltd
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Filing: 1988-04-07
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Granted: —
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Expires: 2008-04-07
Abstract
Abstract An IC card (13) internally stores two different PINs in a memory (77). Collation of these PINs performed at comparator (83) sets the IC card (13) having an internal data memory (82) in different characterizing statuses. When coincidence occurs at the first PIN collation, data input to the data memory (82) of the card (13) is permitted. When coincidence occurs at the second PIN collation, data transfer is permitted. Accordingly, when important data is stored in the IC card (13) and a plurality of persons handle the IC card, the data stored in the IC card (13) can be prevented from being altered unauthorized.
Inventors
- 👤 Shigeyuki Pat. Dept. Hamura R&D Center Kawana
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 20:14
CPC Classifications
G; G07; G07F; G07F7/00; G07F7/08; G07F7/10; G07F7/1008; G06; G06Q; G06Q20/00; G06Q20/30; G06Q20/34; G06Q20/341; G06Q20/355; G06Q20/3555; G06Q20/357; G06Q20/3576; G06Q20/35765
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
252 words
An IC card system having an IC card and a terminal used in association with said IC card, characterized by comprising: an IC card (13) having means (77) for storing at least two different personal identification numbers (PIN), collation means (83) for performing personal identification number (PIN) collation, data memory means (82) and control means (75, 76) for controlling data access to said IC card (13); first PIN data input means (33) for inputting first PIN data to be collated with a first PIN stored in said storing means (77) by said collation means (83) of said IC card (13); second PIN data input means (33) for inputting second PIN data to be collated with a second PIN stored in said storing means (77) by said collation means (83) of said IC card (13); data input means (22, 23) for inputting data to said memory means (82) of said IC card (13); and a terminal unit (14) having readout means (52) for reading out data from said IC card (13) and sending said read-out data to computing means (43) coupled thereto, wherein said control means (75, 76) of said IC card (13) permit to write the data from said data input means (79) to said IC card (13) when said first inputted PIN data coincides with said first stored PIN and permit to transfer the data written in said IC card to a computing unit from said terminal unit (14) when said second inputted PIN data coincides with said stored second PIN.
Claim 2
Dependent Claim
252 words
An IC card system having an IC card and a terminal used in association with said IC card, characterized by comprising: an IC card (13) having means (77) for storing at least two different personal identification numbers (PIN), collation means (83) for performing personal identification number (PIN) collation, data memory means (82) and control means (75, 76) for controlling data access to said IC card (13); first PIN data input means (33) for inputting first PIN data to be collated with a first PIN stored in said storing means (77) by said collation means (83) of said IC card (13); second PIN data input means (33) for inputting second PIN data to be collated with a second PIN stored in said storing means (77) by said collation means (83) of said IC card (13); data input means (22, 23) for inputting data to said memory means (82) of said IC card (13); and a terminal unit (14) having readout means (52) for reading out data from said IC card (13) and sending said read-out data to computing means (43) coupled thereto, wherein said control means (75, 76) of said IC card (13) permit to write the data from said data input means (79) to said IC card (13) when said first inputted PIN data coincides with said first stored PIN and permit to transfer the data written in said IC card to a computing unit from said terminal unit (14) when said second inputted PIN data coincides with said stored second PIN.
Claim 3
Dependent Claim
28 words
The IC card system according to claim 1, characterized in that said first and second PIN input means (33) are a keyboard provided on said IC card (13).
Claim 4
Dependent Claim
26 words
The IC card system according to claim 2, characterized in that said data input means (22, 23) is a keyboard provided on said terminal unit (14).
Claim 5
Dependent Claim
43 words
The IC card system according to claim 1, characterized in that the data stored in said data memory means (77) of said IC card (13) is readable through said terminal unit (14) when said stored PIN coincides with said second inputted PIN data.
Claim 6
Dependent Claim
63 words
The IC card system according to claim 4, characterized in that said control means (75, 76) comprises first storage means (84) for storing a coincidence of said first PIN and second storage means (84) for storing a coincidence of said second PIN and wherein permission and inhibition of data writing is controlled based on contents of said first and second storage means (84).
Claim 7
Dependent Claim
35 words
The IC card system according to claim 1, characterized in that said data entered by said data input means (22, 23) includes a remittance destination name and a remittance amount used in a firm-banking system.
Claim 8
Dependent Claim
29 words
The IC card system according to claim 6, characterized in that said IC card (13) has display means (34) for displaying data stored in said data memory means (82).
Claim 9
Dependent Claim
36 words
The IC card system according to claim 6, characterized in that said terminal unit (14) has display means (24) for displaying data which is entered into said data memory means (82) of said IC card (13).
Claim 10
Dependent Claim
109 words
An IC card comprising: data memory means (82); data input/output means (79) for performing a writing operation of external data and sending data to an external unit; first PIN memory means (77) for storing a first PIN; second PIN memory means (77) for storing a second PIN; PIN input means (33) for inputting a PIN; PIN comparator means (83) for comparing said input PIN with said first PIN or with said second PIN and outputting a coincidence signal; and control means (75, 76, 84) for permitting said data input/output means (79) to perform data writing when said input PIN coincides with said first PIN and to perform data output.
Claim 11
Dependent Claim
109 words
An IC card comprising: data memory means (82); data input/output means (79) for performing a writing operation of external data and sending data to an external unit; first PIN memory means (77) for storing a first PIN; second PIN memory means (77) for storing a second PIN; PIN input means (33) for inputting a PIN; PIN comparator means (83) for comparing said input PIN with said first PIN or with said second PIN and outputting a coincidence signal; and control means (75, 76, 84) for permitting said data input/output means (79) to perform data writing when said input PIN coincides with said first PIN and to perform data output.
Claim 12
Dependent Claim
25 words
The IC card according to claim 9, characterized in that said PIN input means (33) is a keyboard (33) provided on said IC card (13).
Claim 13
Dependent Claim
24 words
The IC card according to claim 10, characterized by further comprising display means (34) for displaying data stored in said data memory means (32).
Claim 14
Dependent Claim
75 words
The IC card according to claim 9, characterized in that said control means (75, 76, 84) comprises first and second flag registers (84), and writes "1" in said first flag register when said input PIN coincides with said first PIN and writes "1" in said second flag register (84) when said input PIN coincides with said second PIN, data writing and data reading being controlled by contents of said first and second flag registers (84).
Claim 15
Dependent Claim
45 words
The IC card according to claim 12, characterized by further comprising a backup battery (86) for causing said first PIN memory means (77), said second PIN memory means (77), said data memory means (82) and said second flag register (84) to always hold memory contents.
Claim 16
Dependent Claim
34 words
The IC card according to claim 9, characterized in that data stored in said data memory means (82) includes at least a remittance destination name and a remittance amount used in a firm-banking system.
Claim 17
Independent Claim
134 words
A method for inputting data to be sent to a host computer to an IC card (13) having a data memory (82), first and second PINs and PIN collation means (83), using said IC card and a terminal device (14) coupled to said host computer, characterized by comprising the steps of: a) inputting said first PIN; b) comparing said input first PIN with a corresponding PIN held in said IC card (13); c) permitting data writing to said IC card (13) when said first PIN coincides with said corresponding PIN; d) performing data writing; e) inputting said second PIN; f) comparing said input second PIN with a corresponding PIN held in said IC card (13); and g) inhibiting data writing to said IC card (13) when said second PIN coincides with said corresponding PIN.
Claim 18
Independent Claim
134 words
A method for inputting data to be sent to a host computer to an IC card (13) having a data memory (82), first and second PINs and PIN collation means (83), using said IC card and a terminal device (14) coupled to said host computer, characterized by comprising the steps of: a) inputting said first PIN; b) comparing said input first PIN with a corresponding PIN held in said IC card (13); c) permitting data writing to said IC card (13) when said first PIN coincides with said corresponding PIN; d) performing data writing; e) inputting said second PIN; f) comparing said input second PIN with a corresponding PIN held in said IC card (13); and g) inhibiting data writing to said IC card (13) when said second PIN coincides with said corresponding PIN.
References Cited (Backward Citations)
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