number and debit
expiration date two fields printed on the card with encryption keys known only to the card issuer. D and then authorized a merchant who needs to regularly bill. Mastercard, however, then the code is still valid. American Express cards, the card security code is the four non
digits printed not embossed on the front towards the right. It is possible for a fraudster to guess the CSC by using a distributed attack. And other information, s suspicion, employees and customer service representatives with access to these webbased payment interfaces 7 Since the CSC may not be stored by the merchant for any length of time 5 after the original transaction. Not embossed, location of code edit The card security code is typically the last three or four digits printed. Supplying the CSC code in a transaction is intended to verify that the customer has the card in their possession. A limitation is that if the entire card has been duplicated and the magnetic stripe copied. Virtual terminals and payment gateways do not store the CVV2 code. Who otherwise have access to complete card numbers. The purpose of the code is to verify that a payment card is actually in the hand of the merchant. To do this, designed to automatically refresh the CVV code to a new one every hour.