CVV- Card Verification Value, and Mastercard called the Card Validation Code (CVC). VISA CVV and MC CVC by card number, valid and binding services, the code generated by 3 or 4 digit number, usually written on the card magnetic stripe of the two tracks inside a user-defined data area. CVV and CVC generation method is the same, but not the same name for nothing. CVV2 is printed on the Visa / MasterCard card, a digital signature area. It is located after the credit card number to 3 digits. We usually see the back of the card after the three figures is CVV2, it is not the CVV code.
CVV code - the difference with the CVV2 code is CVV2 and CVC2 algorithm is also derived from the same card verification value, is only generated when the card printed in the signature strip.
CVV / CVC in the on-line transactions (credit card) when the check, CVV2/CVC2 in the off-site transactions / manual transactions (brush less than a card) is checked.
CVV password CVV code CVV code CVV cryptographic checksum validation refers to commercial banks in its use of bank card number and magnetic stripe data format encoding rules to add a custom encryption algorithm code (CVN), related to bank cards also have been known as the CVN bank cards.
CVV information is stored in the magnetic stripe bank cards track, according to card number, track the primary account number, card-issuing banks mark the code and other information, through the banks from the definition of a special encryption algorithm to encrypt each step have adopted CVKA technology encryption, be verified yards. Because different banks have different encryption algorithms, therefore, to use the bank card information to obtain some of the illegal production of counterfeit cards in the card issuer decryption can be identified which can not be used.
Code - the security level of consumption and CVV code CVV sites take credit cards process is basically one of the following three cases: A: Card Number + period
This multi-airlines, hotel reservations or car rental booking types.
B: Card Number + + CVV2 code is valid The reason to add one more card on the back of the CVV code in order to confirm the card is indeed the cardholder's own hands. So, usually on the outside when the credit card, be careful not to be easily seen, especially the record that three numbers, so people along with the validity of stolen card numbers to online to go after the fraudulent
C: card number + period + CVV2 code + "Visa verification" code (Verified by Visa).
This last code is a card-issuing banks agreed in advance with the holder of a special password for online credit card verification. In support of the "Visa verification" code merchant payment, fill out the information in B, the site will pop up a page (this page is card-issuing banks, and careful that the blue top of the window can be found displayed in the address bar is the card-issuing bank's website, and the pop-up page on issuing banks LOGO), demand fill "Visa verification" code. This web page is actually out of business, directly from the cardholder with the bank to complete the authentication, but also ensure that "Visa verification" code will not be intercepted by merchants. Better protection of their security.
CVV code "Visa verification" service-based named "3D Security" technology platform, this technology specifications and communication protocol is a secure connection using encryption layer protocol (SSL) technology, encryption, encryption technology that is currently the most online business adopted by households. "Visa Verify" service mark would be displayed in the participating online merchants page, will be in the cardholder registration, as well as online shopping enter your password each time when validation.
If you choose a shopping site by adding a "Visa verification" shopping Web site, you can enjoy the VISA certification services, such a business is the result confirmed the safety of VISA shopping site. Payments will pop up a page so that you enter the Password (that is Visa verification code). This web page is actually retrieved card-issuing bank's page (This can be the page from the pop-up logo on the card-issuing bank to judge, because businesses can not only through a string of credit card numbers and determine is thousands of miles in a certain issued by banks), by the cardholder through the bank agreed in advance with the "Visa authentication" password to complete the authentication between the card-issuing banks. This page is because it is the cardholders issuing bank to authenticate directly on web pages, it will not result in passwords being intercepted merchants. Is validated, the card-issuing bank will send a message to businesses, to authorize the transaction, the cardholder and the merchant so you can complete the transaction.
VISA verification role is not only to verify the legitimacy of foreign sites, but also verify the cardholder identity, thereby reducing the external risks of unauthorized use of online shopping.
