Mastercard, Visa, Access, Barclaycard, Amex, JCB ...
Jamie Lawrence
jamiel at sybase.com
Thu Jul 7 10:24:32 PDT 1994
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At 11:20 AM 07/07/94 -0400, Paul J. Ste. Marie wrote:
>The credit card swipers send the entire transaction in for both
>approval and reporting. I'd imagine that the account number, merchant
>number, and transaction amount are all there, since that's all needed.
>Whether or not they encrypt the data I don't know.
I believe modern card readers for at least MC/Visa use some form of
encryption, but for backwards compatibility the central offices also
work unencrypted. In the hotel I used to work in, the card reader
certainly didn't encrypt.
-j
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Jamie Lawrence <jamiel at sybase.com>
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