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From: howellg@idec.UUCP
Newsgroups: sci.crypt
Subject: Re: ATM security (was Re: DES info wanted)
Message-ID: <809@idec.stc.co.uk>
Date: Wed, 20-May-87 05:50:05 EDT
Article-I.D.: idec.809
Posted: Wed May 20 05:50:05 1987
Date-Received: Sat, 23-May-87 08:31:59 EDT
References: <2071@hoptoad.uucp> <599@umnd-cs.D.UMN.EDU> <5747@eddie.MIT.EDU> <294@kuling.UUCP> <1071@aecom.YU.EDU>
Sender: root@idec.stc.co.uk
Reply-To: howellg@idec.stc.co.uk (Gareth Howell)
Organization: ICL Network Systems, Stevenage, UK
Lines: 15

In article <1071@aecom.YU.EDU> mkaplan@aecom.YU.EDU (Marc Kaplan) writes:
>In article <294@kuling.UUCP>, andersa@kuling.UUCP (Anders Andersson) writes:
>> In article <1060@aecom.YU.EDU> mkaplan@aecom.YU.EDU (Marc Kaplan) writes:
>> >	BTW, I assume that the ATMs will temporarily invalidate a card if
>> 
>> If you make three (or maybe four) failing attempts in a row with the same
>
>	While I admit a few hundred is too much, three or four is too little.

In the UK it needs 3 successive bad attempts for the card to be
invalidated.  If you make 2 then get it right on the third you are OK.
Usually the ATM card is also a cheque guarantee card so you do get the
card back but the MS is erased and the card can only be used to
guarantee cheques.
Gareth.