Methods, systems, and computer program products for transaction authentication may use a mobile phone number as a consumer identifier to trigger transaction authentication inside a trusted mobile application. A consumer may select a payment device associated with the application at an e-commerce website, enter the mobile phone number, and in response thereto, receive a notification on a mobile phone associated with the application. The consumer reviews the transaction details and approves the transaction via the application using biometrics and/or a personal identification number (PIN).

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This work is licensed under a Creative Commons Attribution 4.0 License.