IC card with hierarchical file structure

Details IC card with hierarchical file structure IC card with hierarchical file structure

1993-08-12

1995-04-18

Hajec, Donald

Registers

Records

Conductive

235380, 235441, 235382, G06K 1906

Patent

active

054080827

ABSTRACT:
An integrated circuit card includes a processing controller, a non-volatile memory having plural files in a hierarchical structure, with each file having an access conditions controller relating to the level number of said hierarchical structure, and a RAM having plural key information fields corresponding to the level numbers. Each access condition controller has an access key box designation table which indicates which keys should be verified and a vertical matching condition settings table which indicates which level keys should be collected for verification.

REFERENCES:
patent: 4849614 (1989-07-01), Watanabe et al.
patent: 4882474 (1989-11-01), Anderl et al.
patent: 4985920 (1991-01-01), Seki
patent: 5038025 (1991-08-01), Kodera
patent: 5161256 (1992-11-01), Iijima

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