What is PA DSS?

The Payment Application Data Security Standard ( PA-DSS) is a Payment Card Industry Security Standards Council (PCI SSC) managed program to help software vendors and others develop secure payment applications that do not store prohibited payment card data and ensure their payment applications support compliance with the Payment Card Industry Data Security Standard (PCI DSS).  Payment applications that are sold, distributed or licensed to third parties are subject to the PA-DSS requirements.  In-house payment applications developed by merchants or service providers that are not sold to a third party are not subject to the PA-DSS requirements, but must still be secured in accordance with the PCI DSS.