Article View: sci.crypt
Article #3594Re: ATM security (was Re: DES info wanted)
From: Marc Kaplan
Date: Mon, 18 May 1987 00:40
Date: Mon, 18 May 1987 00:40
19 lines
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1571 bytes
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 > >a few hundred bad attempts are made to remove money. At least, thats how > >I would do it. > > If you make three (or maybe four) failing attempts in a row with the same > card at a Swedish ATM, the machine will swallow the card and physically > deface it (>burp!<), and you'll have to contact your bank to get a new one. While I admit a few hundred is too much, three or four is too little. Last week I made two mistakes before getting it right. With this method, if I came back the next morning and made *one* mistake, my card is history. For a 'bad guy', on the other hand, four attempts are not likely to net him the number. Four thousand is more like it. ...aecom!mkaplan Eric Safern
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: arc1-ca.pugleaf.net!utzoo!mnetor!seismo!husc6!cmcl2!philabs!aecom!mkaplan From: mkaplan@aecom.YU.EDU (Marc Kaplan) Newsgroups: sci.crypt Subject: Re: ATM security (was Re: DES info wanted) Message-ID: <1071@aecom.YU.EDU> Date: Sun, 17-May-87 20:40:49 EDT Article-I.D.: aecom.1071 Posted: Sun May 17 20:40:49 1987 Date-Received: Tue, 19-May-87 01:16:09 EDT References: <2071@hoptoad.uucp> <599@umnd-cs.D.UMN.EDU> <5747@eddie.MIT.EDU> <294@kuling.UUCP> Organization: Albert Einstein College of Medicine, NY Lines: 19 Summary: Three or Four considered too little.