Prepaid or stored-value card with means for preventing useful fraudulent alteration
First Claim
1. A prepaid card with means for preventing useful fraudulent alteration, comprising, on a supporting element, at least one electrically rewritable permanent register, at least one temporary register and at least one control element for comparison between a usable value that is present in said at least one permanent register and a new value which is temporarily provided in said at least one temporary register, said at least one control element being suitable to allow to write said new value in said at least one permanent register in replacement of said usable value only if said new value is smaller than said usable value.
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Accused Products
Abstract
A prepaid card with elements for preventing useful fraudulent alteration, comprising, on a supporting element, at least one electrically rewritable permanent register, at least one temporary register and at least one control element for comparison between a usable value that is present in the at least one permanent register and a new value which is temporarily provided in the at least one temporary register. The control element is suitable to allow to write the new value in the permanent register in replacement of the usable value only if the new value is smaller than the usable value.
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Citations
10 Claims
- 1. A prepaid card with means for preventing useful fraudulent alteration, comprising, on a supporting element, at least one electrically rewritable permanent register, at least one temporary register and at least one control element for comparison between a usable value that is present in said at least one permanent register and a new value which is temporarily provided in said at least one temporary register, said at least one control element being suitable to allow to write said new value in said at least one permanent register in replacement of said usable value only if said new value is smaller than said usable value.
- 6. A stored-value card with means for preventing useful fraudulent alteration, comprising, on a supporting element, at least one electrically rewritable permanent register, at least one temporary register and at least one control element for comparison between an old value that is present in said at least one permanent register and a new value which is temporarily provided in said at least one temporary register, said at least one control element being suitable to allow to write said new value in said at least one permanent register in replacement of said old value only if said new value is greater than said old value.
Specification