A method, device, and system for conducting trusted payment transactions including establishing a trust relationship between a first mobile computing device and a second mobile computing device. The first mobile computing device may initiate a payment transaction with a point-of-sale device, communicate with the second mobile communication device to retrieve payment information from the second mobile communication device, and complete the payment transaction with the point-of-sale device using the payment information. The second mobile computing device is configured to verify the user and identity of the first mobile computing device prior to providing the payment information. Communications between the mobile computing devices may be encrypted using pre-determined encryption techniques.