1. A method of gaining access to a resource using an access token linked to a print medium, comprising the steps of: sensing, using a sensor module of a mobile telecommunications device, coded data provided on the print medium, the coded data is provided as a two-dimensional pattern and encodes information, the information being indicative of a print media identifier which uniquely identifies the print medium and a two-dimensional coordinate grid on a surface of the print medium; determining the print media identifier from sensed coded data; determining a position of the sensor module relative to the surface of the print medium from the sensed coded data; identifying, using the position of the sensor module relative to the surface of the print medium and the print media identifier, the access token, the access token being associated with the print medium identifier and a region on the surface of the print medium; causing the access token to be supplied to a system; authenticating the access token by the system; and, if the authentication succeeds, providing access to the resource.