US0054O8082A
til] Patent Number: 5,408,082 [45] Date of Patent: Apr. 18,1995
[54] IC CARD WITH HIERARCHICAL FILE STRUCTURE
[75] Inventors: Nobuya Takagi, Neyagawa;
Yoshihiro Mutoh, Ibaraki; Masaaki
Ueda, Katano; Nobunari Murai;
Takeshi Nakatomi, both of Osaka, all
of Japan
[73] Assignee: Matsushita Electric Industrial Co., Ltd., Osaka, Japan
[21] Appl. No.: 105,646
[22] Filed: Aug. 12,1993
[30] Foreign Application Priority Data
Aug. 13, 1992 [JP] Japan 4-215817
Oct. 19, 1992 [JP] Japan 4-279884
[51] Int. CI.' G06K 19/06
[52] U.S. CI 235/492; 235/380;
235/441; 235/382
[58] Field of Search 235/380, 492, 441, 382,
235/375
[56] References Cited
U.S. PATENT DOCUMENTS
4,849,614 7/1989 Watanabe et al 235/382 X
4,882,474 11/1989 Anderl et al 235/380
4,985,920 1/1991 Seki 235/380 X
5,038,025 8/1991 Kodera 235/492
5,161,256 11/1992 Iijima 235/380
FOREIGN PATENT DOCUMENTS
0479655 4/1992 European Pat. Off. .
2635891 3/1990 France .
4009715 1/1992 Japan 235/380
92/13322 8/1992 WIPO .
Primary Examiner—Donald Hajec
Assistant Examiner—Esther H. Chin
Attorney, Agent, or Firm—Ratner & Prestia
[57] 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.
9 Claims, 18 Drawing Sheets
