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CVV is a new authentication procedure established by credit card companies to further efforts towards reducing fraud for
internet transactions. It consists of requiring a card holder to enter the CVV number
in at transaction time to verify that the card is on hand. The CVV code is a security
feature for "card not present" transactions (e.g., Internet transactions),
and now appears on most (but not all) major credit and debit cards. This new feature
is a three- or four-digit code which provides a cryptographic check of the information
embossed on the card. Therefore, the CVV code is not part of the card number itself.
The CVV code helps ascertain that the customer placing the order actually possesses the credit/debit card and that the card
account is legitimate. Each credit card company has its own name for the CVV code, but
it functions the same for all major card types. (VISA refers to the code as CVV2, MasterCard
calls it CVC2, and American Express calls it CID.)
The back panel of most Visa/MasterCard/Discover cards contains the full 16-digit account number, followed by the CVV/CVC
code. Some banks, though, only show the last four digits of the account number followed
by the code. When you submit your credit card information your data is protected by Secure
Socket Layer (SSL) technology certified by a digital certificate.