P3 Card verification values

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Lesson P3: CVV, CVV2 and iCVV, the role of the service code, and dynamic values in concept.

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The opening of the lesson

Why it matters

Card verification values prove that the card data came from a real card, not just from a list of card numbers. They are checked in nearly every authorisation:

the CVV on the magnetic stripe;
the CVV2 typed in e-commerce;
the iCVV in the chip data.

Issuers compute them, and acquirers and testers must carry the right value in the right field.

In the full lesson

The concept
Step by step
In the real world
Common mistakes
What to test

What module P3 covers →

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