Content deleted Content added
Expanded slightly. |
Improved citation. |
||
Line 5:
<!-- End of AfD message, feel free to edit beyond this point -->
An '''MM code''' (the "MM" being an abbreviation for the [[German language|German]] "Moduliertes Merkmal") is a "machine-readable modulated" feature that has been added to German [[debit card]]s during manufacture as an anti-[[counterfeiting]] measure since 1979.<ref>{{cite book|author=Wolfgang Rankl and Wolfgang Effing|title=Handbuch der Chipkarten. 3rd edition|publisher=Hanser Verlag|date=1999|language=German}}</ref><ref>{{cite web|url=https://www.kartensicherheit.de/ww/de/pub/praevention/sicherheitsprodukte/mm_merkmal.php|title=MM-Merkmal|work=|author=|publisher=|date=|accessdate=2008-01-10|language=German}}</ref> It was developed by "Gesellschaft für Automation und Organisation" (a subsidiary of Giesecke & Devrient) in Munich for the German ec-Card system and MM verification devices have been added to German ATMs from 1982 onwards.<ref name="ct1996">{{cite news|author=Carsten Meyer|url=http://www.heise.de/ct/96/07/094/|title=Nur Peanuts — Der Risikofaktor Magnetkarte|work=[[c't]]|date=July 1996|pages=94|language=German|publisher=Heise Zeitschriften Verlag}}</ref> If a payment card contains an MM code as well as a magnetic stripe, any fraudster who counterfeits the card but fails to read and duplicate the MM code on to the copy will be detected when trying to use the counterfeit in an [[Automated Teller Machine]].
==Function==
| |||