Abstract: Methods, systems, and computer program products for securely exchanging a credit card token with an external computer for purchasing a product. The system includes one or more processors, a memory, and a camera coupled to at least one processor. The system scans a first barcode by the camera. The first barcode is published upon a display of the external computer and indicates a plurality of payment parameters of the product. The system decodes the first barcode to extract the payment parameters. The system publishes the payment parameters for display to a user. The system receives a first input, where the first input indicates a credit card number for purchasing the product, and a credit card token that corresponds to the credit card number is saved in the memory.