Provided is a method including receiving, by a user device, a request from an identity service to approve communicating a user proof-of-identity to a relying party. A user of the user device is prompted to request a one-time transaction identifier based on the request. Based on a first input from the user, the user device requests the one one-time transaction identifier from the identity service. In response to the request for the one-time transaction identifier, the user device receives the one-time transaction identifier from the identity server and displays the one-time transaction identifier on a first user device screen. The user inputs the one-time transaction identifier on a second user device screen and the user device communicates the one-time transaction identifier to the identity service. In response to receiving the at least one inputted one-time transaction identifier, the relying party determines whether to approve or deny a transaction.