An approach for receiving a request for an authentication code for presentation in an authentication user interface, wherein the request is from a relying party and wherein the authentication user interface is presented by the relying party at a first device. The approach further involves transmitting the authentication code to the relying party. The approach also involves authenticating a user with respect to the relying party by determining that a second device associated with the user has read the authentication code from the authentication user interface of the first device, wherein the second device is a previously authenticated device.