Registers – Systems controlled by data bearing records – Credit or identification card systems
Patent
1995-09-08
1996-10-08
Hajec, Donald T.
Registers
Systems controlled by data bearing records
Credit or identification card systems
G06K 500
Patent
active
055633951
ABSTRACT:
A card type storage medium which can solve inconvenience to owners of the card type storage medium upon PIN verification or data restoration, and a card type storage medium issuing apparatus which issues such card type storage medium. The card type storage medium comprises a storage unit holding a file area including a dedicated file served to hold PINs and file names of data files stored in a directory area in the storage unit such that the PIN and file name of each data file correspond to each other. Said card type storage medium holds control information including a master PIN for the dedicated file in the directory area in the storage unit. A recovery information unit is additionally provided in a data file in the file area in the storage unit, which holds recovery information obtained every time the data file is updated. This card type storage medium is applicable to, for example, an IC card.
REFERENCES:
patent: 4734568 (1988-03-01), Watanabe
patent: 4801787 (1989-01-01), Suzuki
patent: 4831245 (1989-05-01), Ogasawara
patent: 4882474 (1989-11-01), Anderl et al.
patent: 5285200 (1994-02-01), Kuriyama
patent: 5400082 (1995-03-01), Kamiya
patent: 5408082 (1995-04-01), Takagi et al.
Fujitsu Limited
Hajec Donald T.
Minh Le Thien
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