Abstract: Methods, systems and apparatus for conducting secure transactions using digital barcodes. In an embodiment, a consumer mobile device launches a mobile payment application and then receives selection of a payment card account and an instruction to pay via a digital barcode by a cardholder. The consumer mobile device then generates at least one of a dynamic quick response (QR) code and a barcode, displays the QR code and/or the barcode on a display component, receives a purchase transaction confirmation request including merchant identification data and a transaction amount, and displays a confirmation notification for approval by the cardholder. After receiving a confirmation response, the consumer mobile device transmits the confirmation response to a digital enablement system (DES) computer. In some implementations, after transaction authorization, the consumer mobile device may receive and display a transaction completed confirmation message.