Talk:Card security code: Difference between revisions

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==Related to actual number?==
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::: This isn't an encryption, although it may be a hash. The bank can't recover the card number, no matter how many keys they have, from a mere 3 digits! [[User:Andy Dingley|Andy Dingley]] ([[User talk:Andy Dingley|talk]]) 16:52, 10 June 2008 (UTC)
::::whatismy security code [[Special:Contributions/107.123.53.77|107.123.53.77]] ([[User talk:107.123.53.77|talk]]) 03:57, 4 November 2024 (UTC)
 
== Security model ==
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[[User:12.205.149.45|12.205.149.45]] 22:54, 3 August 2007 (UTC)
 
 
 
== Location of CVV2 ==
 
 
There is an incorrect statement in this article:
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:CVV1 is stored on the card. CVV2 is not. I think the statement is accurate [[User:Talyian|Talyian]] 16:07, 14 September 2007 (UTC)
:Talyian is correct - CVV1 is on the mag stripe, CVV2 is printed on the card and is not present on the mag stripe. [[User:Dkam|Dkam]] ([[User talk:Dkam|talk]]) 12:39, 12 July 2009 (UTC)
Don't get inforamtion for wikipedia <!-- Template:Unsigned IP --><small class="autosigned">—&nbsp;Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/2601:18D:4601:2CD0:F413:6350:E36B:B11D|2601:18D:4601:2CD0:F413:6350:E36B:B11D]] ([[User talk:2601:18D:4601:2CD0:F413:6350:E36B:B11D#top|talk]]) 18:23, 23 March 2019 (UTC)</small> <!--Autosigned by SineBot-->
 
== History ==
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http://www.zeit.de/2011/21/Kreditkarten-Sicherheit (german) <span style="font-size: smaller;" class="autosigned">—Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/84.157.21.179|84.157.21.179]] ([[User talk:84.157.21.179|talk]]) 10:12, 21 May 2011 (UTC)</span><!-- Template:UnsignedIP --> <!--Autosigned by SineBot-->
 
It has not remotely been hacked. They simply brute forced it by trying authorizations en masse at various websites. The fact that this was allowed to occur means that the card issuers simply were lacking in their fraud detection, I'm sure at this point the issuers simply look for a large amount of attempted authorizations and flag the card. Thus, the CVV is not weakened as a result. You can also brute force card numbers by generating all card numbers that have a valid Luhn check and attempt authorizations on those, but in cases like this the gateway provider would probably alert the store in question. Brute force methods are not a good way to do fraud on a large scale. [[Special:Contributions/98.103.160.18|98.103.160.18]] ([[User talk:98.103.160.18|talk]]) 15:09, 7 April 2017 (UTC)
 
== Prohibition on recording codes on paper forms ==
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CID numbers must not be stored for any purpose. They are available for real time Transactions only. [American Express Merchant Reference Guide – U.S., section 5.10, 2009] <small><span class="autosigned">— Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[User:Coloradoauthor|Coloradoauthor]] ([[User talk:Coloradoauthor|talk]] • [[Special:Contributions/Coloradoauthor|contribs]]) 22:21, 16 May 2012 (UTC)</span></small><!-- Template:Unsigned -->
: Its own ''section'', no. A sentence or two summarizing (and sourced to) the above, sure. [[User:Anomie|Anomie]][[User talk:Anomie|⚔]] 01:11, 17 May 2012 (UTC)
 
== 3 digit CVV on AXP signature panel ==
 
Have noticed that there is a 3 digit code at the right hand end of the signature panel on my American Express cards (those from AXP itself and those from two other independent issuers). I would imagine that this is for the benefit of procedures or hardware that only allow for a 3 digit CVV. [[User:Scott Sanchez|knoodelhed]] ([[User talk:Scott Sanchez|talk]]) 17:38, 15 October 2013 (UTC)
 
== External links modified ==
 
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*Added archive https://web.archive.org/web/20140424011239/https://www.securesuite.net/cibc/tdsecure/spc_description.jsp?cycfg_affinity=mc to https://www.securesuite.net/cibc/tdsecure/spc_description.jsp?cycfg_affinity=mc
 
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== Magnetic stripe? ==
 
Why is this article primarily talking about magnetic stripes? Surely that is decades-out-of-date tech, replaced by smartcard chips ages ago? Is this article out of date, or are there still some countries (3rd world maybe?) that still use mag stripes? Can this article be updated to primarily refer to chips please? [[User:Evilandi|Andrew Oakley]] ([[User talk:Evilandi|talk]]) 09:50, 30 July 2020 (UTC)
:I may tell a secret to you, but mag stripe is still must to be accepted everywhere. Lol. Unless it is next gen where there is no mag stripe and "Signature is not required" is written. Or if you cannot sign your transaction sheet. [[Special:Contributions/2A00:1FA0:4638:232D:D94:FC02:20D6:E94B|2A00:1FA0:4638:232D:D94:FC02:20D6:E94B]] ([[User talk:2A00:1FA0:4638:232D:D94:FC02:20D6:E94B|talk]]) 08:24, 23 August 2020 (UTC)
::Or if the terminal does not support that. And that is most of modern ones, also if there is no human for example like in automatic kiosks... Both card (as you mentioned) and terminal can say they do not support this method, called signature in cardholder verification process. [[Special:Contributions/109.252.90.66|109.252.90.66]] ([[User talk:109.252.90.66|talk]]) 18:30, 25 March 2021 (UTC)
 
== Error in text ==
 
The first sentence says "…is a series of numbers that, in addition to the bank card number, is printed (but embossed) on a credit or debit card." Shouldn't that be "NOT" embossed? [[Special:Contributions/24.16.93.143|24.16.93.143]] ([[User talk:24.16.93.143|talk]]) 04:05, 19 June 2024 (UTC)