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Re: credit card conventional wisdom
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>No. What Phil is saying is that the magnetic strip contains an extra
>group of digits which are only available when the stripe is read, and not
>when the card is used for CNP.
The extra gigits I was refering to are the ones on the front of the card
but not embossed.
Wow, you learn something every day. I've never in
my whole life (well, my American Express life,
over 15 years) noticed those four digits. I've
never been asked for them by anyone, or noticed
them being written down, either. Exactly when and
how are they used?
Greg Rose INTERNET: [email protected]
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NSW 2086 Australia. co-mod sci.crypt.research, USENIX Director.
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