IC card
First Claim
1. An IC card having at least control means and storage means, wherein said storage means comprises:
- a storage area for storing information thereon;
a secret identification number area for storing at least one predetermined secret identification number thereon; and
an error count area for storing the number of times of improper input of the secret identification number thereon, and wherein said control means comprises;
comparison means for comparing a supplied secret identification number with said predetermined secret identification number stored on said secret identification number area;
means for accessing said storage area when said comparison means indicates coincident as a result of comparison;
error count means for storing the number of times of discrepancy into said error count area when said comparison means indicates discrepancy as a result of comparison;
storage area lock means for inhibiting access to said storage area when said error count means has counted a predetermined number of time; and
unlock means for invalidating the count of said error count area to release said storage area lock means, on the basis of at least one specific input signal after the count of said error count area has counted said predetermined number.
1 Assignment
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Accused Products
Abstract
There is provided an IC card having control means (1) and storage means (4), wherein storage means (4) comprises a storage area for storing information thereon, a secret identification number area for storing a predetermined secret identification number thereon, and an error count area for storing the number of times of improper input of the secret identification number, and wherein the control means (1) comprises comparison means (107, 112) for comparing a supplied secret identification number with the predetermined secret identification number stored on the secret identification number area, means (108, 113) for accessing to the storage area when the comparison means indicates coincidence as a result of comparison, error count means (120 to 126) for storing the number of times of discrepancy into the error count area when the comparison means indicates discrepancy as a result of comparison, storage area lock means (102, 104) for inhibiting access to the storage area when the error count means has counted a predetermined number of times, and reset means (151, 152, FIGS. 9A and 15) for invalidating the count of the error count area on the basis of the specific input signal.
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Citations
13 Claims
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1. An IC card having at least control means and storage means, wherein said storage means comprises:
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a storage area for storing information thereon; a secret identification number area for storing at least one predetermined secret identification number thereon; and an error count area for storing the number of times of improper input of the secret identification number thereon, and wherein said control means comprises; comparison means for comparing a supplied secret identification number with said predetermined secret identification number stored on said secret identification number area; means for accessing said storage area when said comparison means indicates coincident as a result of comparison; error count means for storing the number of times of discrepancy into said error count area when said comparison means indicates discrepancy as a result of comparison; storage area lock means for inhibiting access to said storage area when said error count means has counted a predetermined number of time; and unlock means for invalidating the count of said error count area to release said storage area lock means, on the basis of at least one specific input signal after the count of said error count area has counted said predetermined number. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification