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  2. Card security code - Wikipedia

    en.wikipedia.org/wiki/Card_security_code

    There are several types of security codes and PVV (all generated from DES key in the bank in HSM modules using PAN, expiration date and service code): . The first code, 3 numbers, called CVC1 or CVV1, is encoded on track one and two of the magnetic stripe of the card and used for card present transactions, with signature (second track also contains pin verification value, PVV, but now it is ...

  3. What Is a Credit Card Security Code and Why Is It ... - AOL

    www.aol.com/credit-card-security-code-why...

    The three- or four-digit code on credit and debit cards can be either a card security code or a card verification value. A three-digit CVV is located on the back of Mastercard®, VISA® and ...

  4. Chip Authentication Program - Wikipedia

    en.wikipedia.org/wiki/Chip_Authentication_Program

    This confirmation message contains a message authentication code (typically CBC-MAC/Triple DES) that is generated with the help of a card-specific secret key stored securely in the smartcard. Such cancellation messages pose no security risk to the regular EMV payment application, but can be cryptographically verified and are generated by an EMV ...

  5. Personal identification number - Wikipedia

    en.wikipedia.org/wiki/Personal_identification_number

    The VISA method is used by many card schemes and is not VISA-specific. The VISA method generates a PIN verification value (PVV). Similar to the offset value, it can be stored on the card's track data, or in a database at the card issuer. This is called the reference PVV.

  6. How to find your credit card's security code - AOL

    www.aol.com/news/2010-06-24-how-to-find-your...

    On most cards the security code is located on the back, to the right of the signature block, but since it can move around here's an easy way to find the security code on any credit card.

  7. Identify legitimate AOL websites, requests, and communications

    help.aol.com/articles/identify-legitimate-aol...

    • Don't reply to any SMS request asking for a verification code. • Don't respond to unsolicited emails or requests to send money. • Pay attention to the types of data you're authorizing access to, especially in third-party apps.

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