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- Path: sparky!uunet!zaphod.mps.ohio-state.edu!cs.utexas.edu!usc!randvax!vortex!lauren
- From: lauren@vortex.COM (Lauren Weinstein)
- Newsgroups: sci.crypt
- Subject: Re: ATM security question
- Message-ID: <121.UUL1.3#1@vortex.COM>
- Date: 8 Nov 92 01:21:39 GMT
- References: <1992Nov7.201929.24071@u.washington.edu>
- Organization: Vortex Technology
- Lines: 23
-
- Greetings. On-card encrypted PINs have been used for some purposes.
- They have become increasingly uncommon in recent years, with a
- definite move toward centralized verification.
-
- At a major California bank, for example, their original ATM system
- would instantly ack a card as soon as you finished entering the PIN.
- At that time, they were using encrypted PINs on the card. A point
- came when they issued all new cards, and required that everyone come
- in once to set the PIN. This involved running the card through a
- reader for ID and then letting a modem at the bank dial up the
- central system to set the PIN in the system. It was at the same time
- that PIN acks started taking a considerable period of time (usually
- several seconds--though you're told to go ahead and start entering
- your first transaction instead of waiting for the ack--but you'll be
- bounced later if the PIN is incorrect). Also, the ATMs no longer
- worked at all when the central system was down (previously simple
- withdrawals had gone ahead anyway).
-
- In any case, it seemed likely that the bank had switched to a centralized
- verification system, and I later confirmed this with the bank while in
- the process of clearing up some card problems.
-
- --Lauren--
-