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The card security codes are 3 or 4 digit codes printed or embossed on Visa, Mastercard, American Express and Discover cards. These codes are also referred to as CVV2, CVC, CSC or CCID. Their purpose is to provide additional protection against fraudulent card use.
The card security codes are considered highly sensitive data and should never be stored, even in an encrypted format. Storage of this value will place the merchant in jeopardy with PCI and CISP compliance.