Description:
The last digit of a credit card is a check digit that is used to detect keystroke errors. when a check card is entered into a computer. In this article I implemented a check digit algorithm which is public(ISO 2894),which is not widely Known. This check digit Algorithm is designed to catch transposed digits or other typing errors. It is designed as a general-purpose security mechanism. Unfortunately, some businesses have used the algorithm as allow-cost way of "verifying" credit numbers. For example, some online services have deployed software that creates accounts for any individual presenting a credit card number that passes the algorithm, in an attempt to save the cost of performing millions of verifications.
The algorithm is:
Here the Windows application :
Enter the credit card number in the upper textbox and press check button then a text is displayed in the lower text box displaying, whether the credit card is valid or not.
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