| 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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| 02/19/2004 | WO2004015580A1 Digital content with information of latent value to purchaser and method for making the same |
| 02/19/2004 | US20040034781 Watermarking of digital object |
| 02/12/2004 | WO2004013786A1 Commodity indication data transmission method and system, and reception apparatus |
| 02/12/2004 | US20040030902 Information recording device, information reproducing device, information recoring method, information reproducing method, and computer program |
| 02/12/2004 | US20040028256 Image processing apparatus and method, computer program, and computer-readable storage medium |
| 02/11/2004 | EP1389011A2 A method of embedding a steganographic code in an image signal |
| 02/11/2004 | CN1474591A Data Hidving and extracting method, system and circuit |
| 02/05/2004 | WO2002069071A3 Copy protection via multiple tests |
| 02/05/2004 | US20040025025 System and method for hashing digital images |
| 02/05/2004 | US20040025024 Information processing apparatus and information processing method |
| 02/05/2004 | US20040025023 Watermarking application system for broadcast contents copyright protection |
| 02/05/2004 | US20040021549 System and method of providing and autheticating works and authorship based on watermark technique |
| 02/04/2004 | CN1473429A Stream recording and/or reproducing apparatus and recording and/or reproducing method |
| 02/04/2004 | CN1473332A Information recording device information reproducing device, information recording mehtod, information reproducing method and computer program |
| 01/28/2004 | EP1385166A2 Data recording medium, data reproducing method and reproducing device |
| 01/28/2004 | EP1385165A2 Information transmitting device and information transmitting method |
| 01/28/2004 | EP1385164A2 Data outputting method and data outputting device |
| 01/28/2004 | EP1385163A2 Data processing system and information providing method |
| 01/27/2004 | US6683958 Apparatus and method for embedding and extracting information in analog signals using distributed signal features and replica modulation |
| 01/27/2004 | US6683546 Methods for producing highly compressed software products |
| 01/22/2004 | US20040015363 Audio watermarking to convey auxiliary information, and media employing same |
| 01/22/2004 | US20040015362 Methods for decoding watermark data from audio, and controlling audio devices in accordance therewith |
| 01/15/2004 | WO2004006494A1 Parallel distribution and fingerprinting of digital content |
| 01/15/2004 | US20040010694 Parallel distribution and fingerprinting of digital content |
| 01/15/2004 | US20040010670 Embedding data in an information signal |
| 01/14/2004 | CN1467985A Steganographically encoded media object having an invisible colorant |
| 01/13/2004 | US6678392 Method for encoding auxiliary data within a source signal |
| 01/08/2004 | US20040005076 Associated information adding apparatus and method associated information detecting apparatus and method and illegal use preventing system |
| 01/08/2004 | US20040004115 Usage dependent ticket to protect copy-protected material |
| 01/08/2004 | US20040004114 Usage dependent ticket to protect copy-protected material |
| 01/07/2004 | EP1139650B1 Method for embedding electronic watermark and method for decoding the same |
| 01/06/2004 | US6675146 Audio steganography |
| 01/06/2004 | US6674874 Data processing apparatus and method and storage medium |
| 01/06/2004 | US6674873 Method and device for inserting and detecting a watermark in digital data |
| 01/02/2004 | EP1374596A1 Method and arrangement for detecting multiple watermarks in an information signal |
| 01/01/2004 | US20040003253 Additional-information detection processing apparatus and method, content playback processing apparatus and method, and computer program |
| 01/01/2004 | US20040001610 Image processing apparatus and method, computer program, and computer-readable storage medium |
| 01/01/2004 | US20040001609 Image processing apparatus and method, computer program, and computer-readable storage medium |
| 01/01/2004 | US20040001164 Image processing apparatus and method, computer program, and computer-readable storage medium |
| 12/31/2003 | WO2004002159A1 Robust signature for signal authentication |
| 12/31/2003 | WO2003032300A3 Method and apparatus for the encryption of data |
| 12/30/2003 | US6671806 Watermark detector |
| 12/30/2003 | US6671407 System and method for hashing digital images |
| 12/30/2003 | US6671386 Geometrical transformation identifying system |
| 12/23/2003 | US6668325 Obfuscation techniques for enhancing software security |
| 12/23/2003 | US6668068 Image attribute altering device and electronic watermark embedding device |
| 12/18/2003 | WO2003105111A1 Multi-section decoding lens |
| 12/18/2003 | US20030232179 Light control material for displaying color information, and images |
| 12/18/2003 | US20030231869 Data reproduction apparatus, data recording apparatus, circuit element, data reproduction method and data recording method |
| 12/17/2003 | EP1371164A2 Theft resistant graphics |
| 12/17/2003 | CN1462397A Method of protecting and managing digital contents and system for using thereof |
| 12/16/2003 | US6665419 Digital watermark inserting system and digital watermark characteristic parameter table generating method |
| 12/11/2003 | US20030228980 Displaying image |
| 12/11/2003 | US20030228014 Multi-section decoding lens |
| 12/10/2003 | EP1370083A1 Content distribution/protecing method and apparatus |
| 12/04/2003 | WO2003085632A3 Device for reconstructing a graphical message |
| 12/03/2003 | EP1366494A1 Enhanced copy protection of proprietary material employing multiple watermarks |
| 12/03/2003 | EP1366438A1 Apparatus, method and system for directory quality assurance |
| 11/27/2003 | WO2003098546A1 Tamper-resistant visual encryption method and device |
| 11/27/2003 | WO2003098406A2 System and method for digital watermarking of data repository |
| 11/27/2003 | CA2483992A1 System and method for digital watermarking of data repository |
| 11/26/2003 | EP1364291A2 Apparatus, method and system for multiple resolution affecting information access |
| 11/26/2003 | EP1364278A2 Apparatus, method and system for tracking information access |
| 11/26/2003 | EP1364277A2 Apparatus, method and system for effecting information access in a peer environment |
| 11/26/2003 | CN1458790A Electronic water print embedding device and its embedding method and recording medium |
| 11/25/2003 | US6654887 Steganography decoding methods employing error information |
| 11/25/2003 | US6654480 Audio appliance and monitoring device responsive to watermark data |
| 11/20/2003 | US20030217272 System and method for digital watermarking of data repository |
| 11/20/2003 | US20030215111 Image processing apparatus, image processing system, electronic information apparatus, image processing method, control program, and computer-readable recording medium |
| 11/19/2003 | EP1363236A2 Apparatus, method and recoding medium for delay suppression during embedding of watermarks in video sequences |
| 11/19/2003 | EP1362474A1 Method and arrangement for detecting a watermark in an information signal |
| 11/19/2003 | CN1457603A Method and arrangement for detecting multiple watermarks in information signal |
| 11/19/2003 | CN1457600A Content distribution/protecing method and apparatus |
| 11/19/2003 | CN1457590A Method and electric circuit arrangement for detecting watermark in information signal |
| 11/19/2003 | CN1128535C Data hiding and extracting method and system for transmitting and receiving data for network |
| 11/13/2003 | WO2003065723A3 Watermark-based access control method and device |
| 11/13/2003 | US20030210784 Digital watermark-embedding apparatus, digital watermark-embedding method, and recording medium |
| 11/12/2003 | CN1455912A Apparatus and method for issuing and authenticating securities, etc. using digital water marking |
| 11/12/2003 | CN1455579A Image processing device and system and method, and electronic information device |
| 11/12/2003 | CN1455407A Data reproducing device and method, data recording device and method, circuit element |
| 11/11/2003 | US6647129 Method and system for encoding image and audio content |
| 11/11/2003 | US6647127 Method of manipulating image data and a recording medium for recording a processing program thereof |
| 11/06/2003 | WO2003055222A3 Increasing integrity of watermarks using robust features |
| 11/06/2003 | WO2002060112A8 Apparatus, method and system for multiple resolution affecting information access |
| 11/06/2003 | US20030206633 Image encrypting method, and image decrypting method |
| 11/05/2003 | EP1358729A2 Apparatus, method, and system for accessing digital rights management information |
| 11/05/2003 | EP1358543A1 Apparatus method and system for registration effecting information access |
| 11/05/2003 | EP0829151B1 Method of encoding sequences consisting of figure-coded data units |
| 11/04/2003 | US6643384 Watermark data hiding apparatus, a method of hiding watermark data, a method of transmitting data including watermark data, a recording medium storing data including watermark data, a data and watermark data reading apparatus, and a method of reading data and watermark data |
| 10/30/2003 | US20030204812 Information processing method and apparatus, and computer program and computer-readable storage medium |
| 10/30/2003 | US20030202680 Information processing method and apparatus, and computer program and computer -readable storage medium |
| 10/29/2003 | CN1452116A Device and method for making and identifying file capable of verifying forging or changing thereof |
| 10/28/2003 | US6639997 Apparatus for and method of embedding and extracting digital information and medium having program for carrying out the method recorded thereon |
| 10/28/2003 | CA2220816C Data hiding method and data extracting method |
| 10/28/2003 | CA2207169C File transfer using facsimile modem |
| 10/22/2003 | EP1355308A1 Data reproduction apparatus, data recording apparatus, circuit element, data reproduction method and data recording method |
| 10/22/2003 | CN2582084Y Cipher device |
| 10/21/2003 | US6636967 Electronic-watermark control apparatus and method, information control apparatus and method, and storage medium capable of being read by a computer |
| 10/21/2003 | US6636617 Method and apparatus for inserting and extracting watermark into and from contents information |
| 10/21/2003 | US6636616 Method and apparatus for digital watermarking using error diffusion |