JPS6465681A - Ic card - Google Patents

Ic card

Info

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
Application number
JP62221197A
Other languages
Japanese (ja)
Inventor
Yujiro Sasahara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MIRAI BILL KENKYU KAIHATSU KK
MIRAI BIRU KENKYU KAIHATSU KK
Original Assignee
MIRAI BILL KENKYU KAIHATSU KK
MIRAI BIRU KENKYU KAIHATSU KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by MIRAI BILL KENKYU KAIHATSU KK, MIRAI BIRU KENKYU KAIHATSU KK filed Critical MIRAI BILL KENKYU KAIHATSU KK
Priority to JP62221197A priority Critical patent/JPS6465681A/en
Publication of JPS6465681A publication Critical patent/JPS6465681A/en
Pending legal-status Critical Current

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.
JP62221197A 1987-09-05 1987-09-05 Ic card Pending JPS6465681A (en)

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)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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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