CVV Guessing Best Practices: A Comprehensive Buying Guide
Discover the best practices for CVV guessing to ensure a safe and successful transaction.
Redeem your gift cards at any of our Merchants
You can purchase a gift card from any of these locations
Onyx Gift Cards is a Grenadian company designed to introduce, market and manage gift cards systems in Grenada for retailers and corporations. We are enthusiastic about the effect and influence we will have on the local market. We intend to expand our systems regionally with a range of product offerings and services.
Gift cards are the preferred way of giving and receiving gifts. They carry a monetary value that can be redeemed for gifts at your favorite store.
Onyx GiftCards are “Open Gift Cards” which means that they can be redeemed at multiple merchant locations. They are standard credit card size, can fit into the average wallet and made of PVC plastic. Onyx GiftCards are Barcoded for security and safety for the consumer and bear a disclaimer at the back.
Onyx Giftcards can be bought with a branded Card backer which is black in colour and is designed to fit the card. There is an area to write a brief message to the recipient as well.
There is no dependable way to guess a card verification value. The CVV is a three-digit code on most cards and a four-digit code on American Express, assigned by the issuing bank when the card is produced. It is not derived from the card number, and it appears nowhere else on the card. A merchant must send the code to the issuer for validation on every card-not-present transaction, and every failed attempt is recorded, counted and scored. Guessing is not a method. It is a way to get a card, an account and a merchant account shut down.
The value is generated with a cryptographic key and a calculation function that the issuer keeps private. The card number, expiration date and service code are inputs, but the key is never public and is never printed on the card. Without that key, the value is one of 1,000 possibilities for a three-digit code and one of 10,000 for a four-digit code. Anyone filing transactions against a card receives an authorization response for each one, and the issuer logs that response along with the source of the request.
Using a card number without authorization, or attempting to, falls under 18 U.S.C. 1029, which covers fraudulent use of access devices and trafficking in them. Penalties reach 10 years for a first offense and 15 years for repeat offenses, with fines added on top. Buyers and sellers of stolen card data are prosecuted under the same statute. The U.S. Secret Service and the FBI investigate these cases alongside state authorities, and repaying the money does not remove the charge.
PCI DSS prohibits storing the verification value after authorization. Sensitive authentication data must not be kept, even in encrypted form. Systems that collect the code need to encrypt it in transit, pass it to the processor and then discard it. Holding the code in a database turns one breach into a far larger one and puts the merchant out of compliance.
Report unauthorized card use to the issuer first, then to the FTC at IdentityTheft.gov. Report stolen card data offered for sale to the FBI Internet Crime Complaint Center. Banks reverse fraudulent charges, but the account holder still has to file the report.