Keyno is dynamic security that can easily be added to all Visa Credit & Debit cards, preventing Fraud on Card Not Present (CNP) transactions. A new 3-digit dynamic CVV2 (CVVKey) code is issued multiple times a day and replaces the static 3-digit security code that is printed on the card. The dynamic CVV2 (CVVKey) is validated on VisaNet during the transaction and is compatible with existing card processing. See https://nilsonreport.com/mention/445/keyno/