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by jbroman 4568 days ago
Not sure if this is serious or snark, but...no, you use the card number, of course. Similarly, the magnetic stripe is not typically used in online transactions either.

The question is whether the chip-and-PIN technology would have revealed less information (i.e. insufficiently much to allow online purchases, etc.).
1 comments
jrockway 4568 days ago
Target's card readers, last time I checked, suck in the whole card like some ATM machines. So they can easily OCR the card number and CVV2, and store that.

What always weirded me out about Target is that they used the credit card number (or name, or something on the card) as the key into their "loyalty program". If you bought some generic drug last time, this time their machine will print out a coupon for the name-brand version. This always weirded me out a little bit, though there is nothing preventing them from just storing a hash. Of course, the average developer never stores just a hash, and here we are.

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helper 4567 days ago
Why would you think that Target OCRs CVV2? They already have CVV1 (used for card in hand) read off the magstrap, so what would they want with CVV2? It would also be an insane violation of PCI rules.
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jrockway 4567 days ago
As far as I know, big companies can negotiate with the individual networks to do whatever they want with your credit card information, including storing the data in a non-PCI-compliant manner.
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callahad 4567 days ago
> Target's card readers, last time I checked, suck in the whole card like some ATM machines. So they can easily OCR the card number and CVV2, and store that.

At least in the Minneapolis store I shopped at during the breach, it was a simple swipe terminal.

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