US Patent 9055050 User authentication of applications on third-party devices via user devices

In one embodiment, a first computing device receives an access token from a second computing device, the access token being generated by the second computing device for a specific software application executing on a specific computing device; stores the access token; receives a request for the access token from a software application executing on a third computing device; verifies whether the software application is the same as the specific software application and the third computing device is the same as the specific computing device for which the access token is generated; and sends the access token to the third computing device only when the software application is the same as the specific software application and the third computing device is the same as the specific computing device for which the access token is generated.