JPS6465681A - Ic card - Google Patents
Ic cardInfo
- Publication number
- JPS6465681A JPS6465681A JP62221197A JP22119787A JPS6465681A JP S6465681 A JPS6465681 A JP S6465681A JP 62221197 A JP62221197 A JP 62221197A JP 22119787 A JP22119787 A JP 22119787A JP S6465681 A JPS6465681 A JP S6465681A
- Authority
- JP
- Japan
- Prior art keywords
- card
- personal
- counter
- written
- memory
- 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.)
- Pending
Links
Abstract
PURPOSE:To prevent an IC card from being used by a third person by allowing an owner to register a personal identification (ID) number in a memory, counting up the number of inputs of an ID number other than the registered one by a counter, and when the counted value exceeds the prescribed number of times, writing an invalid flag. CONSTITUTION:A personal ID number is written in the memory 14 by means of a ten-key input part 12 to complete the registration of the personal ID card. It is supposed that the third person acquiring the IC card inputs ID numbers at random to try to use the card. The inputted numbers are compared with the personal ID number written in the memory 14 by an operation part 11. The count value of the counter 15 is increased one by one every detection of discrepancy in the compared result. When the number of times of discrepancy exceeds a prescribed number (e.g. 5), the counter 15 outputs a ripple carry. And invalid flag is written in a register 16 receiving the ripple carry and the operation part 11 automatically stops its operation. Thereby, the function of the IC card is stopped on the way of the third person's repeated trial for the collation of the ID number, so that the IC card can be prevented from being abused.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62221197A JPS6465681A (en) | 1987-09-05 | 1987-09-05 | Ic card |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62221197A JPS6465681A (en) | 1987-09-05 | 1987-09-05 | Ic card |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6465681A true JPS6465681A (en) | 1989-03-10 |
Family
ID=16762991
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62221197A Pending JPS6465681A (en) | 1987-09-05 | 1987-09-05 | Ic card |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6465681A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61143893A (en) * | 1984-08-30 | 1986-07-01 | Casio Comput Co Ltd | Ic card |
JPS61228567A (en) * | 1984-12-13 | 1986-10-11 | Casio Comput Co Ltd | Electronic personal identification card and its display system |
-
1987
- 1987-09-05 JP JP62221197A patent/JPS6465681A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61143893A (en) * | 1984-08-30 | 1986-07-01 | Casio Comput Co Ltd | Ic card |
JPS61228567A (en) * | 1984-12-13 | 1986-10-11 | Casio Comput Co Ltd | Electronic personal identification card and its display system |
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