The Secure Transaction Cloud (STC) solution offer NFV based virtualized secure payment applications for transaction transport, routing, and switching with specific Virtual Network Functions (VNF) for security, payment protocol handling, protocol translation etc, with the latest and most advanced, prominent, widely adopted, industry standard digital payment transaction protocol of ISO 20022, enabling evolution to the Open Banking standards based payment. The virtualized capabilities allow the solution to support a wide range of payment types including Internet payments, mobile payments, POS based transactions which are IP/Mobile access based, ATM transactions, and all forms of eCommerce, mCommerce payments with PCI standards compliant security utilizing virtualized cloud native HSMs and Smart API integrations.