IC card which can set security level for every memory area
First Claim
1. An IC card which can set a security level for each memory area, having at least a microprocessor and a memory, said memory comprising:
- a plurality of memory areas for respectively storing data classified in accordance with kinds of data which can be written and read out from the outside;
a key code area for storing a plurality of key codes; and
security level memory means for storing a group of key code input conditions each consisting of at least one of said plurality of key codes in correspondence to each of said memory areas and each for accessing each of said plurality of memory areas; and
said microprocessor comprising means for accessing the relevant memory area to be accessed after comfirming that the key code or key codes specified by said key code input condition was/were input.
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Accused Products
Abstract
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.
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Citations
8 Claims
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1. An IC card which can set a security level for each memory area, having at least a microprocessor and a memory, said memory comprising:
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a plurality of memory areas for respectively storing data classified in accordance with kinds of data which can be written and read out from the outside; a key code area for storing a plurality of key codes; and security level memory means for storing a group of key code input conditions each consisting of at least one of said plurality of key codes in correspondence to each of said memory areas and each for accessing each of said plurality of memory areas; and said microprocessor comprising means for accessing the relevant memory area to be accessed after comfirming that the key code or key codes specified by said key code input condition was/were input. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification