Re: [Full-Disclosure] Credit card numbers

From: Dan Stromberg (
Date: 07/17/03

  • Next message: Michele Chubirka: "RE: [Full-Disclosure] Credit card numbers"
    To: "Myers, Marvin" <>
    Date: 17 Jul 2003 11:57:11 -0700

    On Thu, 2003-07-17 at 10:49, Myers, Marvin wrote:
    > Maybe it is only me, but does anyone else notice a big jump in the
    > number of merchants that are printing the entire credit card number
    > and expiration date on receipts?
    > Over the past 6 months I have had to educate about a dozen local
    > merchants about the possible abuse scenarios that exist with this type
    > of information leakage. If there
    > Is not already some sort of law governing this policy, there should
    > be.

    I believe there's a patent on the idea of only listing four digits of a
    credit card. So yes, there's an actual financial incentive to do the
    wrong thing.

    A local grocery store was doing 8 digits for a while - before they went
    out of business. Another shows all of them - they seem to be doing

    Shredders are your friends. But don't let that stop you from
    complaining to the merchant in question. Don't behead the person behind
    the counter - but maybe ask them to relay a message to their manager.

    On a related note, how do you get web vendors not to store your credit
    card # on their hard disks longer than absolutely necessary? I trust
    (ssl data entry * number of orders) a lot more than a merchant's ability
    to stay up to date on patches until my card expires.

    Dan Stromberg DCS/NACS/UCI <>

    Full-Disclosure - We believe in it.

  • Next message: Michele Chubirka: "RE: [Full-Disclosure] Credit card numbers"