1. A method of gaining access to a resource using an access token linked to a print medium, comprising the steps of: determining a print media identifier from the print medium using a sensor module of a mobile telecommunications device, the print media identifier having been linked to the access token; identifying, using the mobile telecommunications device and the print media identifier, the access token; and, causing the access token to be supplied to a system, wherein the system is configured to authenticate the access token and, if the authentication succeeds, provide access to the resource.