File management apparatus for IC card

Details File management apparatus for IC card File management apparatus for IC card

1994-03-22

1996-05-14

Hajec, Donald T.

Registers

Records

Conductive

235487, 395600, 902 1, 902 4, 902 26, G06K 1906

Patent

active

055170145

ABSTRACT:
A file management apparatus capable of inhibiting an accessing operation for a plurality of areas within files. The file management apparatus includes a memory storing files each having multiple areas, a first storage unit for storing lock data denoting a locking condition of an accessing operation for each of the files, a determination device for determining whether the accessing operation for areas to be accessed is inhibited by referring to the lock data for the files, and an accessing device for accessing a particular one of the areas when the determination means determines that access to the group of areas containing that particular area is not inhibited. The file management apparatus also determines the inhibited
on-inhibited status for data areas within each file based on lock data and key data corresponding to each of those data areas.

REFERENCES:
patent: 4734568 (1988-03-01), Watanabe
patent: 4829169 (1989-05-01), Watanabe
patent: 4928001 (1990-05-01), Masada
patent: 4930129 (1990-05-01), Takahira
patent: 5097118 (1992-03-01), Iijima

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