Unauthorized copy preventing system, unauthorized copy preventing method, unauthorized copy preventing program and computer-readable recording medium storing said program

摘要

An unauthorized copy preventing system for preventing unauthorized copy of an image in an image forming apparatus which carries out image forming, by carrying out predetermined processing on digital image information, includes: a digital signal processor for image processing configured to carry out predetermined image processing on an input image; a digital signal processor for security processing configured to prevent an unauthorized copy; and a digital signal processor control device configured to produce an unauthorized copy determination result for determining whether or not an unauthorized copy is to be carried out on the digital image information by the digital signal processor for image processing.