SudoShinji
Zero's Tailor
- Joined
- Mar 9, 2014
- Posts
- 554
Oh I remember the reason why I won't use my card at that one store. It isn't because the transaction takes longer or I have to add more insertion marks to my card. Its that the machine runs the card as debit even if you choose credit. So their system basically forces you to use the personal info on the chip to make the purchase. Rather than if you run the card as credit, then it goes through the credit card company. If the store were to be hacked, then the credit card portion of the card being compromised isn't a big deal. What is on that chip that is read by the machine?
The data being read on the machine is the same whether it's credit or debit, the chip just creates a one way encryption so that a mitm attack is useless. Your pan data from the card gets stored on a transaction server on the way to the processor in a truncated form. Debit transactions are cheaper to process so most stores have a threshold limit where they force debit (I.e. under $2 force debit). It's specific to the store though, there is no industry wide norm on that one. Using nfc payments is the cheapest so I'm surprised more stores haven't implemented applepay and Android pay, we love it and so do customers.
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