IC card including a memory, a password collating means and an access permitting means for permitting access to the memory
First Claim
Patent Images
1. An IC card for communicating with an external apparatus, the IC card comprising:
- a memory divided into a system area and a user area, the system area having a system password storage area for storing a system password used for collation when the external apparatus accesses the system area, and a password information storage area for storing first information indicating that collation of the system password stored in the system password area is required when the system area is accessed;
password collating means for, when the first information is stored in the password information storage area of the memory, collating a password sent from the external apparatus when the system area is externally accessed with the system password stored in the system password storage area; and
access permitting means for, if the first information is stored in the password information storage area, permitting access by the external apparatus only when the passwords are identical as a result of collation by the password collating means, and for permitting access by the external apparatus without password collation if the first information is not stored in the password information storage area.
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Abstract
A non-contact type IC card includes a programmable memory divided into a user area for storing application data, and a system area for storing a system password and a system password effective code indicating requirement of collation of the system password. If the system area of the memory includes the system password effective code, access to the system area by an external apparatus is permitted only when passwords are identical as a result of password collation. If the system area does not include the system password effective code, the access by the external apparatus can be permitted without the password collation.
101 Citations
5 Claims
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1. An IC card for communicating with an external apparatus, the IC card comprising:
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a memory divided into a system area and a user area, the system area having a system password storage area for storing a system password used for collation when the external apparatus accesses the system area, and a password information storage area for storing first information indicating that collation of the system password stored in the system password area is required when the system area is accessed; password collating means for, when the first information is stored in the password information storage area of the memory, collating a password sent from the external apparatus when the system area is externally accessed with the system password stored in the system password storage area; and access permitting means for, if the first information is stored in the password information storage area, permitting access by the external apparatus only when the passwords are identical as a result of collation by the password collating means, and for permitting access by the external apparatus without password collation if the first information is not stored in the password information storage area. - View Dependent Claims (2, 3, 4, 5)
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Specification