subject: PCI compliance - Understand the New PA-DSS [print this page] The companies which need this compliance should be suing encrypted network transmission and updating their system, application and ant viruses regularly in addition to the PCI requirements. There are number of companies that scan merchants for PCI audits and these companies are approved by Visa and MasterCard. They also help merchants to complete the questionnaire by PCI to show the PCI PA-DSS compliance. If you are fully certified by DSS then no one can breach into your secure systems.