Computer services, namely, providing an internet-based system for securely storing electronic payment information and cardholder payment data; computer services, namely, providing an internet-based system for conducting data analytics for marketing and loyalty programs while securely storing electronic payment information and cardholder payment data; computer services, namely, providing on-line security services for processing electronic payment transactions by replacing cardholder payment data with a unique identifier associated with an electronic payment transaction and thereby enabling merchants to process an electronic payment transaction using the unique identifier; Software as a service (SaaS) featuring software for managing electronic payment information and cardholder payment data via an internet-based system