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- Newsgroups: sci.crypt
- Path: sparky!uunet!charon.amdahl.com!pacbell.com!decwrl!sun-barr!ames!saimiri.primate.wisc.edu!zaphod.mps.ohio-state.edu!rpi!news.ans.net!cmcl2!panix!oppedahl
- From: oppedahl@panix.com (Carl Oppedahl)
- Subject: Re: ATM security question
- Message-ID: <1992Nov6.013029.7294@panix.com>
- Date: Fri, 6 Nov 1992 01:30:29 GMT
- References: <1992Nov5.184546.5854@ulysses.att.com>
- Organization: PANIX Public Access Unix, NYC
- Lines: 30
-
- In <1992Nov5.184546.5854@ulysses.att.com> tom@ulysses.att.com (Tom Smith) writes:
-
- >On another newsgroup, there is a lot of discussion about Automatic
- >Teller Machines and the Personal Identification Number (PIN) associated
- >with an account/card. There is controversy about whether or not
- >an encrypted version of the PIN is encoded onto the magnetic stripe
- >on the card.
-
- Which newsgroup? I'd like to follow that.
-
- >Facts, anyone?
-
- Yes, there is. This means the ATM can match your card to the PIN
- you entered at the ATM, even if the phone lines are cut. Scary, huh?
-
- Well, it means the ATM can match _if it has the key_. Each
- issuer has its own key. The ATM you visit probably can match the
- card PIN with the entered PIN only if the bank that runs it issued
- your card.
-
- In plainspeak, if your card works in the machine _only_ because
- of Cirrus or Plus or NYCE, then the PIN authentication takes place
- somewhere else. Or not at all if the lines are down.
-
-
- Carl Oppedahl AA2KW (intellectual property lawyer)
- 30 Rockefeller Plaza
- New York, NY 10112-0228
- voice 212-408-2578 fax 212-765-2519
-
-