| 摘要 |
PURPOSE:To improve the secret degree of a file, by controlling the access to the file through a card user of a console unit by ranking the access. CONSTITUTION:After inputting a secret code H1 by depressing a key K on a keyboard 2, a card 4 is inserted into a reading part 3. While referring a table 7, a matching part 6 compares the secret code H1 with a read-out identification code I1 and identifies that the user of a card Y is rank A to send the code A to a discriminating part 10. The discriminating part 10 checks the rank column e2 of a table 11 and reads out respective data in R (read), W (write) and f1-f3 (files) corresponding to the code A to discriminate these data. Since data 1 are written in all the columns, access to the files F1-F3 are permitted and reading and writing also are permitted. In case of rank D, access to the files is inhibited. |
