| CPC G06F 21/44 (2013.01) | 20 Claims |

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1. A method comprising:
receiving, at a computer, a request to conduct an interaction from a mobile device;
after receiving the request to conduct the interaction, obtaining, by the computer, a computer address;
providing, by the computer, the computer address to the mobile device, wherein the mobile device provides an access request to the computer address, the access request thereafter being routed to an identity provider computer, wherein the identity provider computer identifies identity data associated with the mobile device or a user of the mobile device;
obtaining, by the computer, the identity data or a derivative of the identity data from the identity provider computer;
determining, by the computer, if the identity data or the derivative of the identity data matches previously stored identity data or a previously stored derivative of identity data; and
if a match is determined, providing, by the computer, a list of user device identifiers, stored in association with the identity data or the derivative of the identity data, to the mobile device.
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