| Patents for G09C 5 - Ciphering or deciphering apparatus or methods not provided for in other groups of this subclass, e.g. involving the concealment or deformation of graphic data such as designs, written or printed messages (2,737) |
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| 06/24/2003 | US6584210 Digital watermark image processing method |
| 06/19/2003 | US20030115470 Method and apparatus for embedding encrypted images of signatures and other data on checks |
| 06/18/2003 | EP1319520A2 Method and apparatus for embedding encrypted images of signatures and other data on checks |
| 06/17/2003 | US6580804 Pixel-based digital watermarks located near edges of an image |
| 06/12/2003 | US20030108200 Recording medium, recording medium method and apparatus , information signal output control method, recording medium reproducing apparatus, signal transmission method, and content data |
| 06/12/2003 | US20030108198 Apparatus and method for computer screen security |
| 06/11/2003 | EP1317809A1 Method and system for steganographically embedding information bits in source signals |
| 06/11/2003 | CN1423764A Network enabled application software system and method |
| 06/11/2003 | CN1423235A Method and apparatus for original information water mark inlaying, water-mark information conreying and reconstructuring water-mark |
| 06/10/2003 | US6577744 Protecting images with an image watermark |
| 06/05/2003 | US20030103646 Coding apparatus and method, decoding apparatus and method, data processing system, storage medium, and signal |
| 06/04/2003 | EP1316917A2 Apparatus and method for embedding watermark into original information, transmitting watermarked information, and reconstructing the watermark |
| 06/04/2003 | EP1316618A2 Nucleic acids for marking objects |
| 06/04/2003 | CN1422492A System for scrambling content, and system for descrambling scrambled content |
| 05/29/2003 | US20030101141 Method, apparatus, and system for processing information by attaching information to digital data, and storage medium storing computer-readable program codes to carry out he method |
| 05/29/2003 | US20030099374 Method for embedding and extracting text into/from electronic documents |
| 05/28/2003 | EP1314312A1 Digital watermarking for multimedia data |
| 05/28/2003 | EP1314156A2 Protecting content from illicit reproduction by proof of existence of a complete data set |
| 05/28/2003 | CN1109993C Data hiding method and system using statistical properties |
| 05/27/2003 | US6571220 Copy generation management method, information signal reproducing method, information signal reproducing apparatus, and information signal recording apparatus |
| 05/27/2003 | US6570996 Watermarking an informational signal |
| 05/22/2003 | WO2001091052A3 Contents forming method and contents reproducing apparatus and method |
| 05/22/2003 | US20030096256 Additive to add discrimination means and matter maintaining discrimination information which containing the additive |
| 05/21/2003 | CN1419786A Watermarking a compressed niformation signal |
| 05/21/2003 | CN1419760A Method and system to uniquely associate multicast content with each of multiple recipients |
| 05/21/2003 | CN1419695A Device for reading, recording and restoring digital data in a copy-protection system for said data |
| 05/20/2003 | US6567780 Audio with hidden in-band digital data |
| 05/20/2003 | US6567535 Steganographic system with changing operations |
| 05/15/2003 | WO2003041072A1 Method of and apparatus for preventing illicit copying of digital content |
| 05/13/2003 | CA2371295C Improved tamper-evident form |
| 05/08/2003 | US20030088773 Method of and apparatus for preventing illicit copying of digital content |
| 05/08/2003 | US20030086587 Watermark detection |
| 05/07/2003 | EP1307840A1 System and method for production and authentication of original documents |
| 05/07/2003 | CN1108063C MPEG2 moving picture encoding/decoding system |
| 05/06/2003 | US6560350 Methods for detecting alteration of audio |
| 05/06/2003 | US6560339 Electronic watermarking method, digital information distribution system using such method, and storage medium storing program of such method |
| 05/02/2003 | EP1306802A2 Encoder and decoder for electronic watermark |
| 04/23/2003 | EP1110400A4 Method and system for protecting digital data from unauthorized copying |
| 04/22/2003 | US6553070 Video-data encoder and recording media wherein a video-data encode program is recorded |
| 04/17/2003 | WO2003032300A2 Method and apparatus for the encryption of data |
| 04/16/2003 | CN1411591A Method and arrangement for embedding watermark in information signal |
| 04/15/2003 | US6549624 Apparatus and method for enhancing the security of negotiable documents |
| 04/10/2003 | WO2003030542A2 Encoding and encrypting devices for secure scalable data streaming |
| 04/10/2003 | US20030068041 Encoding and encrypting devices for secure scalable data streaming |
| 04/09/2003 | EP0739559B1 Method for key distribution using quantum cryptography |
| 04/09/2003 | EP0737387B1 Identification/authentication coding method and apparatus |
| 04/08/2003 | US6546139 Coding apparatus and method, decoding apparatus and method, data processing system, storage medium, and signal |
| 04/08/2003 | US6546129 Image processing apparatus, method, and medium for adding identification information |
| 04/03/2003 | US20030065924 Secure multimedia data transmission method |
| 04/03/2003 | US20030063747 Apparatus and method for embedding and extracting information in analog signals using distributed signal features and replica modulation |
| 04/02/2003 | EP1297492A1 Watermark embedding method and arrangement |
| 04/02/2003 | EP1297405A2 Network enabled application software system and method |
| 04/01/2003 | US6542618 Methods for watermark decoding |
| 03/27/2003 | WO2002071679A3 Theft resistant graphics |
| 03/27/2003 | US20030061489 Embedding data in material |
| 03/27/2003 | US20030059086 Data processing apparatus and method, data processing program, and storage medium |
| 03/26/2003 | EP1296478A2 Security procedure for data transmission |
| 03/26/2003 | EP1295207A1 Watermark detector |
| 03/26/2003 | EP1075757B1 Digital authentication with analog documents |
| 03/26/2003 | CN1406422A Content data transmitting device and method, and recording/reproducing device |
| 03/26/2003 | CN1406373A Recording medium, recording medium recording method and apparatus, information signal output control method, recording medium reproducing apparatus, signal transmission method |
| 03/25/2003 | US6539475 Method and system for protecting digital data from unauthorized copying |
| 03/25/2003 | US6539356 Signal encoding and decoding method with electronic watermarking |
| 03/25/2003 | US6539095 Audio watermarking to convey auxiliary control information, and media embodying same |
| 03/20/2003 | US20030053628 Additional-data embedding apparatus and additional-data embedding method |
| 03/19/2003 | CN1404014A Image processing apparatus and image processing method, program and storing media |
| 03/18/2003 | US6535616 Information processing apparatus, method and memory medium therefor |
| 03/13/2003 | WO2001057869A3 Protecting content from illicit reproduction by proof of existence of a complete data set |
| 03/13/2003 | US20030051237 Classified data-containing data recording medium and method of recording/reproducing the data |
| 03/13/2003 | US20030051153 Device for reading, recording and restoring digital data in a copy-protection system for said data |
| 03/12/2003 | EP1291870A1 Contents data, recording medium, recording method and device, reproducing method and device |
| 03/12/2003 | EP1291819A2 Digital watermark embeddig |
| 03/12/2003 | EP1290877A2 Data scrambling and descrambling system |
| 03/06/2003 | US20030046367 Digital contents distribution system and digital contents distribution method |
| 03/06/2003 | US20030046240 Material distribution apparatus |
| 03/06/2003 | US20030044043 Image processing device and image processing method, program, and storage medium |
| 03/06/2003 | US20030043920 Image processing method |
| 03/05/2003 | EP1288854A2 Secure robust high-fidelity watermarking |
| 03/05/2003 | EP1288766A2 Digital content distribution |
| 03/05/2003 | EP0855052B1 Protection of software against use without permit |
| 03/04/2003 | US6530021 Method and system for preventing unauthorized playback of broadcasted digital data streams |
| 02/27/2003 | WO2003017658A1 Stream recording and/or reproducing apparatus and recording and/or reproducing method |
| 02/27/2003 | WO2003017273A1 Information recoring device, information reproducing device, information recoring method, information reproducing method, and computer program |
| 02/27/2003 | US20030041262 Content protection system |
| 02/26/2003 | EP1286531A1 Authenticatable image with an embedded image having a discernible physical characteristic with improved security feature |
| 02/26/2003 | EP1286315A1 Authentic document and method of making |
| 02/25/2003 | US6526385 System for embedding additional information in audio data |
| 02/25/2003 | US6526171 Image object managing method, an image processing apparatus using said method, and a recording media for programs achieving the same |
| 02/25/2003 | US6523859 Confidential information is printed on an upper transparent laminate. A scrambling pattern is associated with a lower laminate. The upper surface of the lower laminate and the lower surface of the upper laminate are complementary in shape |
| 02/20/2003 | US20030035564 Authenticatable image with an embedded image having a discernible physical characteristic with improved security feature |
| 02/20/2003 | US20030035148 Authentic document and method of making |
| 02/20/2003 | US20030035147 Authentic document and method of making |
| 02/19/2003 | CN1398400A System and method for protecting digital media |
| 02/19/2003 | CN1398385A Secure photo carrying identification device, as well as means and method for authenticating such identification device |
| 02/19/2003 | CN1397920A Burying and detection of electronic watermark |
| 02/13/2003 | US20030033529 Standards compliant watermarking for access management |
| 02/12/2003 | EP1283497A2 Data processing apparatus, data processing system, data processing method, memory medium and program therefor |
| 02/12/2003 | EP1282894A2 Method for integrating hidden information in a set of notes |
| 02/11/2003 | US6519693 Method and system of program transmission optimization using a redundant transmission sequence |
| 02/06/2003 | US20030028776 Data processing apparatus, data processing system, data processing method, memory medium and program therefor |