04734568 is referenced by 152 patents and cites 2 patents.

An IC card which can set a security level for every memory area. A plurality of memory areas for storing data in accordance with the kinds of data; a secret identification number area for storing a plurality of secret identification numbers; a security level memory area for storing the input condition of the input secret identification number consisting of at least one of the secret identification numbers so as to specify this input condition for each memory area; and means for allowing the relevant memory area to be accessed after confirming that the secret identification number or numbers according to a predetermined security level were input.

Title
IC card which can set security level for every memory area
Application Number
6/891876
Publication Number
4734568
Application Date
July 30, 1986
Publication Date
March 29, 1988
Inventor
Hiroshi Watanabe
Kokubunji
JP
Agent
Kenyon & Kenyon
Assignee
Toppan Moore Company
JP
IPC
G06K 19/06
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