Patent ID: 7973965

Claim:
A digital camera comprising: an image sensor for sensing an image; a card reader configured to read a removable data card carrying distortion information; a printer configured to print a distorted image on print media, the printer including a replaceable print roll carrying both the print media and ink to be printed upon the print media; and a controller for controlling the communication of the distorted images to the printer, wherein the print roll includes an ink reservoir section and the ink reservoir section includes a plurality of bladder type containers for storing respective types of ink, a cavity being provided in the ink reservoir section for receiving an integrated circuit device storing information associated with the print roll, a validation apparatus is configured to validate the replaceable print roll and enable the printer to print the distorted image only subsequent to validation of the print roll, and the validation apparatus includes: a first integrated circuit configured to generate a random number, reference information using the random number, and a secret key; and a control system configured to: receive the random number and the reference information from the first integrated circuit, receive validation information from a second integrated circuit positioned on the print roll whereby the validation information is generated by the second integrated circuit using the random number and the secret key, and compare the reference and validation information received from the integrated circuits to validate the print roll.