Title:
IC CARD
Document Type and Number:
Japanese Patent JPH05346977
Kind Code:
A
Abstract:
PURPOSE: To provide the IC card which is improved in safety and throughput by hierarchically controlling a file and key data.
CONSTITUTION: Data from external equipment are received through an input/ output means 5 and a command processing means 6 analyzes and processes the received data according to control information 8 as the collation result of a key stored in a volatile memory 3 and generates an answer corresponding to the received data. A file control means 7 is actuated by the command processing means 6 to perform centralized control over the data to be processed as a gathering of data, and accesses the file in a nonvolatile rewritable memory 9 or data in the file.
Inventors:
MUTO YOSHIHIRO
TAKAGI SHINYA
UEDA MASAAKI
MURAI NOBUNARI
NAKATOMI TAKESHI
TAKAGI SHINYA
UEDA MASAAKI
MURAI NOBUNARI
NAKATOMI TAKESHI
Application Number:
JP15462592A
Publication Date:
December 27, 1993
Filing Date:
June 15, 1992
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
G06K19/07; G06F21/62; G06F21/79; (IPC1-7): G06K19/07
Attorney, Agent or Firm:
Akira Kobiji (2 outside)