Method and apparatus for using at least a portion of a one-time password as a dynamic card verification value (CVV) are disclosed. A credit/debit card is able to generate a dynamic card verification value (CVV). Such a card may also include an indication that the dynamic CVV is to be used as a security code for purchasing or other transactions. A card-based financial transaction can be authorized in accordance with the use of a dynamic CVV by receiving a transaction authorization request for a specific credit/debit card, wherein the transaction authorization request includes a dynamic CVV. The dynamic CVV can be compared to at least a portion of a one-time password generated for the specific credit/debit card, and a transaction authorization can be sent to the merchant or vendor when the dynamic CVV matches all or a portion of the one-time password.