Patent ID: 7283259
Filing Date: 2007-10-16
Classification: G06F,G06K,H04N

Abstract:
1. An image data recording device, comprising: common key generating means for generating a common key based on a print ID transferred from an image data processing device; management means for managing the common key generated by said common key generating means and the print ID transferred from said image data processing device in pairs; common key issue means for transmitting the common key generated by said common key generating means to said image data processing device; common key obtaining means for obtaining the common key corresponding to the print ID from said management means when the print ID and print control data are transmitted from said image data processing device; analyzing means for analyzing the print control data to extract print image data from the print control data wherein said print image data that has been forgery-preventing-image-processed, encrypted, and converted into a command in the image data processing device; decryption means for decrypting the encrypted print image data extracted by said analyzing means using a key corresponding to the print ID; and print means for recording the print image data decrypted by said decryption means on a recording medium, wherein the print image data has been forgery-preventing-image-processed and encrypted in the image data processing device using the common key received from said image data recording device.