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About the CVV and CVC on the credit card

Source: Internet
Author: User
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Both VISA CVV and MC CVC are 3-or 4-bit numbers generated by the card number, expiration date, and service constraint code, and are generally written in the 2-track user-defined data area of the card stripe. CVV and CVC generation methods are the same, but the names are not the same.

CVV2 and CVC2 are also the card verification values obtained by the same algorithm, but are printed on the signature strip when the card is generated.

CVV/CVC Check when online trading (swipe), CVV2/CVC2 on off-site trading/Manual Trading (cannot be brushed).

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