Patent ID: 8028170
Filing Date: 2011-09-27
Classification: B41J,G06F,G06Q,H04M,H04N,Y10S,Y10T

Abstract:
1. A method of using a mobile telephone to authenticate a print medium, the mobile telephone being configured for printing on print media predetermined as authentic, the mobile telephone having a printhead, a processing means, a print path extending past the printhead and a sensor adjacent the print path, the method comprising steps of: inserting a print medium in a media entry slot of the mobile telephone and feeding the print medium along the print path; using the sensor to sense a plurality of said coded data portions coded provided on the surface of the substrate whilst the print medium is being fed along the print path, the print medium having coded data printed thereon in the form of contiguous coded data portions, each coded data portion encoding a signature fragment and an identity of the print medium; using the processing means to interpret the plurality of coded data portions and determine the identity of the print medium encoded in the sensed coded data portions; using the processing means to interpret the plurality of coded data portions and determine the signature fragments from each of the sensed coded data portions; determining a signature from the signature fragments, said signature being indicative of a unique identity of the print medium; generating, using the determined signature and a key, a generated identity; comparing the determined identity of the print medium with the generated identity; authenticating the print medium using the results of the comparison; and using the printhead to print on the print medium determined as authentic.