Keyno describes itself as a dynamic security code that can be added to all Visa credit and debit cards, preventing fraud on CNP transactions. The company also claims to be a smartphone-based technology designed specifically to prevent credit and debit card fraud — rather than simply detect it — on already-issued cards. As such, a 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 is validated on VisaNet during the transaction and is compatible with existing card processing.
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