DATA ACCESS DEVICE

DATA ACCESS DEVICE

PROBLEM TO BE SOLVED: To provide a data access device capable of improving security of concealed information. SOLUTION: Attribute information of the concealed information necessary when reading the concealed information is stored in an unused area of a cluster detected by an unused area detection pa...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: SUGIURA HIROHIKO, MATOBA NARIHIRO
Format: Patent
Sprache:eng
Schlagworte:
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To provide a data access device capable of improving security of concealed information. SOLUTION: Attribute information of the concealed information necessary when reading the concealed information is stored in an unused area of a cluster detected by an unused area detection part 12, and the concealed information is stored in an empty cluster detected by an empty cluster detection part 13. Thereby, the attribute information of the concealed information can be stored in the area not capable of being detected by a conventional data access device, so that the security of the concealed information can be improved. COPYRIGHT: (C)2006,JPO&NCIPI