| 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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| 07/20/2005 | EP1554640A2 Watermark insertion apparatus and watermark extraction apparatus |
| 07/20/2005 | CN1643891A Watermarking a digital object with a digital signature |
| 07/20/2005 | CN1211796C Method for protecting content from illicit reproduction, method for decoding content data from message source, and decoder and encoder thereof |
| 07/20/2005 | CN1211766C Developing reagent for dectylogram sampled by adhesive tape |
| 07/14/2005 | US20050154893 Method for embedding codes, method and apparatus for restoring identification information |
| 07/13/2005 | EP1553780A2 Derivation and quantization of robust non-local characteristics for blind watermarking |
| 07/07/2005 | WO2005062282A1 Crypto display apparatus, system and method for displaying secured images |
| 07/07/2005 | WO2005060590A2 System and method for embedding and extracting key information |
| 07/07/2005 | WO2005022972A3 Printed product and method for the production thereof |
| 07/07/2005 | US20050147276 Decoding hidden data from imagery |
| 07/07/2005 | US20050147275 Encoding hidden data |
| 07/06/2005 | CN1209923C Additional information insertion method, detection method, insertion apparatus and detection apparatus |
| 07/05/2005 | US6915001 Electronic watermarking method and system |
| 06/30/2005 | US20050141024 Image processing system and information processing method |
| 06/29/2005 | EP1546889A1 Digital content with information of latent value to purchaser and method for making the same |
| 06/29/2005 | EP1546888A1 Digital content with information of latent value to purchaser and method for making the same |
| 06/29/2005 | CN1208967C System for processing, coding, and decoding of information signal, and method for information distribution |
| 06/22/2005 | CN1207894C Data Hiding and extracting method, system and circuit |
| 06/21/2005 | US6909784 Recording apparatus and recording method of electronic watermark |
| 06/16/2005 | WO2005053374A2 Printed product |
| 06/16/2005 | US20050129229 System and method for embedding and extracting key information |
| 06/09/2005 | US20050125671 Derivation and quantization of robust non-local characteristics for blind watermarking |
| 06/09/2005 | US20050123134 Digital anti-counterfeiting software method and apparatus |
| 06/08/2005 | EP1538624A2 System and method for copy protection for digital signals |
| 06/08/2005 | CN1205598C Recording medium recording method and apparatus, generator, information signal output control method and signal transmission method |
| 06/02/2005 | US20050120220 Increasing integrity of watermarks using robust features |
| 06/02/2005 | US20050120218 System and method for controlling contents by plurality of pieces of control information |
| 06/02/2005 | US20050117777 Systems for fingerprinting digital data |
| 06/02/2005 | US20050117776 Image marking adapted to the image |
| 06/01/2005 | EP1536628A2 Systems for spectral multiplexing of source images to provide a composite image, for rendering the composite image, and for spectral demultiplexing the composite image to obtain a normalized color image |
| 06/01/2005 | EP1536424A2 System and method for copy protection for digital signals |
| 05/26/2005 | US20050111695 Systems for fingerprinting digital data |
| 05/26/2005 | US20050111693 Systems for spectral multiplexing of source images to provide a composite image, for rendering the composite image, and for spectral demultiplexing the composite image to obtain a normalized color image |
| 05/25/2005 | EP1142190A4 Counterfeit deterrence system |
| 05/25/2005 | CN1203669C Device and method of information processing |
| 05/24/2005 | US6898297 Digital watermark embedding method, digital watermark extracting method, recording medium, image recording device, and image replaying device |
| 05/19/2005 | US20050108545 Derivation and quantization of robust non-local characteristics for blind watermarking |
| 05/19/2005 | US20050108544 Derivation and quantization of robust non-local characteristics for blind watermarking |
| 05/19/2005 | US20050108543 Derivation and quantization of robust non-local characteristics for blind watermarking |
| 05/19/2005 | US20050105733 Derivation and quantization of robust non-local characteristics for blind watermarking |
| 05/18/2005 | EP1317809A4 Method and system for steganographically embedding information bits in source signals |
| 05/12/2005 | US20050102397 Information image utilization system, information image management device, information image management method, content information image, program, and recording medium |
| 05/12/2005 | US20050100189 Image processing apparatus |
| 05/11/2005 | CN1615464A Secure data input dialogue using visual cryptography |
| 05/11/2005 | CN1614708A Information recording medium driving device, system and method for controlling data reproduction |
| 05/11/2005 | CN1201236C Information recording/playing back device, method and data recording media, program providing media |
| 05/05/2005 | US20050097331 Post decode watermarking of media |
| 05/05/2005 | US20050094847 Robust and stealthy video watermarking into regions of successive frames |
| 05/04/2005 | EP1528558A2 Recording and reproducing system, recording apparatus and reproducing apparatus having copy protection function |
| 05/04/2005 | EP1528506A2 Post decode watermarking of media |
| 05/04/2005 | CN1612605A Post decode watermarking of media |
| 05/03/2005 | US6889211 Method and system for distributing multimedia data with management information |
| 05/03/2005 | US6888952 Robust and stealthy video watermarking |
| 04/28/2005 | US20050089192 Watermark detection |
| 04/27/2005 | CN1199180C System for insertion of additional information in audio data |
| 04/26/2005 | US6885755 Information processing method |
| 04/26/2005 | US6883716 Secure photo carrying identification device, as well as means and method for authenticating such an identification device |
| 04/21/2005 | US20050086489 Derivation and quantization of robust non-local characteristics for blind watermarking |
| 04/21/2005 | US20050086488 Information signal copy managing method, information signal recording method, information signal output apparatus, and recording medium |
| 04/21/2005 | US20050086484 Identification information embedding apparatus, analysis apparatus, embedding method, analysis method and program |
| 04/20/2005 | EP1366438A4 Apparatus, method and system for directory quality assurance |
| 04/20/2005 | EP1364291A4 Apparatus, method and system for multiple resolution affecting information access |
| 04/20/2005 | EP1122729B1 Data recorded medium, data reproducing method and reproducing apparatus |
| 04/14/2005 | US20050077351 Secure photo carrying identification device, as well as means and method for authenticating such an identification device |
| 04/13/2005 | EP1522990A2 Signal processing method |
| 04/13/2005 | EP1522165A1 Parallel distribution and fingerprinting of digital content |
| 04/06/2005 | EP1358729A4 Apparatus, method, and system for accessing digital rights management information |
| 03/30/2005 | EP1518410A1 Robust signature for signal authentication |
| 03/30/2005 | EP1364277A4 Apparatus, method and system for effecting information access in a peer environment |
| 03/30/2005 | EP1358543A4 Apparatus method and system for registration effecting information access |
| 03/24/2005 | WO2004062261A3 Methods and apparatus for interactive network sharing of digital video content |
| 03/23/2005 | CN1194325C Appartus and method for issuing and authenticating securities using digital water marking |
| 03/22/2005 | US6870931 Method and system for embedding message data in a digital image sequence |
| 03/17/2005 | WO2005022972A2 Printed product and method for the production thereof |
| 03/17/2005 | CA2525475A1 Printed product and method for the production thereof (variants) |
| 03/16/2005 | CN1193587C Method and system for inserting image mark in image, and corresponding discrimination method |
| 03/10/2005 | US20050053239 Digital watermarking which allows tampering to be detected on a block-specific basis |
| 03/10/2005 | US20050053235 Motion picture encoding and counterfeit tracking system and method |
| 03/08/2005 | US6865677 Contents rendering control method, contents reproducing equipment, and contents distribution equipment |
| 03/08/2005 | US6865675 Method and apparatus for use of a watermark and a unique time dependent reference for the purpose of copy protection |
| 03/08/2005 | US6865589 Watermark detection |
| 03/08/2005 | CA2678622A1 Program encoding and counterfeit tracking system and method |
| 03/02/2005 | CN1588496A Shuffling method and shuffle processing system for Asian character and image |
| 03/02/2005 | CN1191542C Method and device for controlling multimedia data watermark |
| 02/24/2005 | US20050044395 Secure data input dialogue using visual cryptography |
| 02/22/2005 | US6859534 Digital anti-counterfeiting software method and apparatus |
| 02/17/2005 | US20050038756 System and method for production and authentication of original documents |
| 02/17/2005 | US20050036657 Transform domain watermarking of image signals |
| 02/17/2005 | US20050036656 Electronic image-capturing apparatus having function for verifying user |
| 02/16/2005 | EP1506467A2 System and method for digital watermarking of data repository |
| 02/16/2005 | EP1112636A4 Watermarking of digital images using wavelet and discrete cosine transforms |
| 02/16/2005 | CN1582476A Method of and apparatus for preventing illicit copying of digital content |
| 02/16/2005 | CN1190075C Recording and reproducing system, recording apparatus having copy protection function |
| 02/10/2005 | US20050034054 Information image utilization system, information image management server, information image management method, device information image, program, and recording medium |
| 02/10/2005 | US20050033965 Extracting embedded information from digital image data |
| 02/10/2005 | US20050031161 Coding apparatus and method, decoding apparatus and method, data processing system, storage medium, and signal |
| 02/10/2005 | US20050031156 Video steganography |
| 02/09/2005 | CN1189036C Method and system for preventing watermark from being reproduced |
| 02/09/2005 | CN1188803C Ticket security ciphering and identifying method based on identified fibre random distribution |
| 02/08/2005 | US6853737 Electronic watermark embedding device and electronic watermark detecting device, and electronic watermark embedding method and electronic watermark detecting method implemented therein |