Card security code: Difference between revisions

Revision as of 13:30, 5 August 2023

Revision as of 13:31, 5 August 2023

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== Generation ==

The CSC for each card (form 1 and 2) is generated by the card issuer when the card is issued. It is calculated by encrypting the bank card number and expiration date (two fields printed on the card) with encryption keys known only to the card issuer, and decimalising the result (in a similar manner to a [[hash function]]).<ref>{{cite web|date=2012-09-18|title=VISA PIN Algorithms|url=https://www.ibm.com/docs/en/zos/2.1.0?topic=algorithms-visa-pin|access-date=2021-06-18|website=www.ibm.com|language=en-us}}</ref><ref>{{cite web |last=cleansing |first=data |date=31 July |title=Data cleansing |url=httpshttp://alliedinfolinepublibz.boulder.ibm.com/blog/bestcgi-data-cleansing-service-with-allied-infolinebin/bookmgr_OS390/BOOKS/CSFB4Z20/2.4.2?SHELF=&DT=20020114105428 |url-statuspublisher=live IBM|websitetitle=alliedinfolinez/OS Integrated Cryptographic Service Facility Application Programmer's Guide|publisherdate=allied infolineMarch 2002|page=209}}{{dead link|date=September 2022}}</ref><ref>{{cite web|url=http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/CSFB4Z20/2.4.5.16?SHELF=&DT=20020114105428 |publisher=IBM|title=z/OS Integrated Cryptographic Service Facility Application Programmer's Guide|date=March 2002|page=258}} {{dead link|date=September 2020}}</ref>

== Benefits and limitations ==