摘要:
A system for preventing copying of audio/video (AV) data, including a copy control information inspection unit receiving first copy control information from AV data including an AV content information section having the first copy control information and an AV content section having second copy control information, and transmitting the first copy control information and a control command corresponding to the first copy control information, a key generation unit generating a decryption key using the first copy control information and predetermined information for the decryption key generation, according to the control command, and a decryption unit decrypting the AV data with the use of the decryption key.
摘要:
The present invention relates to [a copy protection method for documents and belongs to the technical field of security document protection. In the prior art, important documents, especially classified documents, are generally prohibited from copying by their owners due to security. However, the current technology still unable to fundamentally resolve the issue of illegal copying of classified documents. The method of the present invention is to form an authentication shade underneath the original image. By using a program built in a copy apparatus, whether mark is in the document is determined, so the document could be copied legally. The method of the present invention can detect the watermark within a document quickly and accurately so as to fundamentally stop unauthorized copying of copy-protected documents. As a result, the security of the classified documents is improved greatly. Moreover, the method is easy to implement and no extra hardware storage space is needed.
摘要:
Image identifier information specific to image data to be input to an image duplication apparatus is embedded in the image data as a steganography in advance. Meanwhile, on the side of an image (duplication apparatus, a duplication control apparatus comprised therein decodes the steganography contained in image data, detects the image identifier information, compares the detected image identifier information with pre-assigned license information and permits a duplication operation such as printing onto a print medium or storing into a storage medium if the aforementioned two kinds of information are identical.
摘要:
An image forming apparatus for forming an image on a transfer sheet by transferring a toner image on a photoconductor to the transfer sheet is disclosed. The image forming apparatus (100) includes an image reading part (102) for reading image data from a target document, an image determination part (104) for determining whether the image data read by the image reading part include output prohibited data, and a control part (105) for preventing application of toner to the photoconductor when the image determination part determines that the image data read by the image reading part include the output prohibited data.
摘要:
The pattern (pattern characteristic quantity) extracted from the pattern image carried by original printing paper is stored on the original printing paper and the validity of the original printing paper is verified according to the pattern stored on code-added printing paper at the time of copying the printed contents of the code-added printing paper so as to determine if the code-added printing paper is truly original or not by means of the pattern carried by the printing paper itself. Therefore, it is possible to prevent unauthorized copying with ease without using any special paper and hence appropriately protect the printed contents.
摘要:
An image control system includes an image control apparatus (2) and an image forming apparatus (3, 4). The image control apparatus (2) includes a pattern generating unit (14) that generates a pattern based on a preset process for preventing a fraudulent use of an image; and an image combining unit (15) that combines the image with the pattern to generate a combined image. The image forming apparatus (3, 4) includes a printing unit (22) that prints out the combined image received from the image control apparatus (2).
摘要:
An anticounterfeit detector (ACD) does both a high and low resolution scan of a document. The video signal resulting from the low resolution scan is used to detect a selected type of image, e.g., currency, negotiable securities, etc., by using ACD hardware or software. A corrective action is taken, e.g., preferably even partial printing from the high resolution scan is prevented, the video signal is invalidated, etc., if the selected image is detected. The low resolution signal can also be obtained by decimating or low pass filtering the high resolution signal.