문제

I'm testing an EMV card reader, and I've done the steps indicated here here and here but I can't find a way to know if it's possible or not to get the Card Verification Value (CVV) code that I might need to contact the Merchant Server.

Does somebody has some links or explanation in order to get that value?

PS: I've also checked the EMV books from the EMV Specification and the words CVV/CVC are not even there!

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해결책

CVV is not part of the EMV standard (page 7). This is just a number that is printed on the card; it's not usually present or readable from the chip itself.

You might be able to go digging in the "track 2 equivalent" data field and it might be there (as it would be on a mag-stripe), but I wouldn't bet on it.

다른 팁

First, you need to understand the processing flow for reading EMV Card.

The real CVV is encoded during EMV data preparation with SFI tag 57 containing the track 2 data.

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