Secure information exchange between devices using location and unique codes

Software receives a communication from a smart-television device. The communication includes a device identifier for the smart-television device and a geo-location for the smart-television device. The geo-location results from collaborative location detection that uses stored geo-positions previously received from one or more mobile devices positioned proximate to the smart-television device. The software causes the smart-television device to display a first view that includes a visual icon and a message identifying a connected-television service. The software receives a geo-position for a mobile device. Upon determining that the geo-location of the smart-television device is proximate to the geo-position of the mobile device, the software causes the mobile device to display a second view that includes the visual icon. The software receives a communication from the mobile device that indicates a match between the visual icon in the first view and the visual icon in the second view and connects the devices.