| 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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| 10/07/2008 | US7434055 Recording medium, recording method of recording medium, recording and/or reproducing method of recording medium, and data copy control method |
| 10/07/2008 | US7433488 Information recording medium drive device, information processing apparatus, data replay control system, data replay control method, and computer program |
| 10/02/2008 | US20080240430 Graphic Code Application Apparatus and Method |
| 09/30/2008 | US7430294 Method and apparatus for the encryption of data |
| 09/25/2008 | US20080232584 Hand-held decoder card having a parallax barrier portion and a light filtering portion and method of making same |
| 09/17/2008 | CN100420306C Robust signature for signal authentication |
| 09/17/2008 | CN100420264C Image processing device and system and method, and electronic information device |
| 09/09/2008 | US7424130 Coding apparatus and method, decoding apparatus and method, data processing system, storage medium, and signal |
| 09/09/2008 | US7424111 System and method of applying parity bits to protect transmitting and receiving data |
| 09/04/2008 | US20080212824 Protecting images with an image watermark |
| 09/02/2008 | US7421128 System and method for hashing digital images |
| 08/27/2008 | CN100414865C Content data transmitting device and method, and recording/reproducing device |
| 08/20/2008 | CN101248474A Method for encryption and decryption of data using pixel |
| 08/19/2008 | US7415612 Image encrypting method, and image decrypting method |
| 08/13/2008 | CN101243686A 加密内容及提供解密密钥的系统 Encrypted content and the decryption key system provided |
| 08/12/2008 | US7412074 Hiding codes in input data |
| 08/07/2008 | WO2008093863A1 Method of introducing secrecy improvement by using error correcting code |
| 08/05/2008 | US7409555 Electronic document active content assurance |
| 07/30/2008 | CN101231862A Recording and reproducing data with electronic watermark information |
| 07/30/2008 | CN101231861A Recording and reproducing data with electronic watermark information |
| 07/23/2008 | EP1947853A1 Encrypted content and decryption key providing system |
| 07/23/2008 | EP1946470A1 Methods and apparatus for encrypting, obfuscating and reconstructing datasets or objects |
| 07/22/2008 | US7403617 System and method for copy protection for digital signals |
| 07/17/2008 | WO2008061652A3 Coding method, decoding method, codec and data storage medium for holographic storage |
| 07/16/2008 | CN100403765C Information processing apparatus and its control method |
| 07/15/2008 | CA2317654C Anti-counterfeiting method and apparatus using digital screening |
| 07/10/2008 | WO2007106798A3 Systems and methods for authoring and protecting digital property |
| 07/02/2008 | CN100399373C Image forming equipment |
| 07/01/2008 | US7395431 Data encryption method, recording medium, data transfer apparatus, and encrypted data decryption method |
| 07/01/2008 | US7395429 Mutual authentication method, program, recording medium, signal processing system, reproduction device, and information processing device |
| 06/26/2008 | WO2008076177A2 Automatic dependent surveillance system secure ads-s |
| 06/19/2008 | WO2008072497A1 Contents judging device, contents judging method, information reproducing device, information reproducing method and information recording medium |
| 06/17/2008 | US7389421 Countermeasure against estimation-based attacks of spread-spectrum watermarks |
| 06/11/2008 | EP1930181A2 Multilayer product for marketing and medium using the same |
| 06/05/2008 | US20080131084 Steganographic Encoding and Detecting for Video Signals |
| 06/05/2008 | US20080131083 Audio Encoding to Convey Auxiliary Information, and Media Embodying Same |
| 06/05/2008 | US20080130883 Methods and Systems for Digital Image Security |
| 06/03/2008 | US7382905 Desynchronized fingerprinting method and system for digital multimedia data |
| 05/29/2008 | WO2008061302A1 Device for keeping track of passwords |
| 05/28/2008 | EP1625020A4 Method and apparatus for providing embossed hidden images |
| 05/28/2008 | CN100391251C Method and system of distributing multimedia data using management information |
| 05/27/2008 | US7379588 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 |
| 05/27/2008 | US7379205 System and method for embedding and extracting key information |
| 05/20/2008 | US7376264 Systems for spectral multiplexing of a source image and a background image to provide a composite image, for rendering the composite image, and for spectral demultiplexing of the composite images |
| 05/08/2008 | WO2008053576A1 Image encryption/decryption device, method, and program |
| 05/08/2008 | WO2008053545A1 Image encryption/decryption device, method and program |
| 05/07/2008 | EP1917653A1 Method for encryption and decryption of data using pixel |
| 05/06/2008 | US7370205 Content distribution system, content distribution method and terminal device |
| 05/06/2008 | US7370204 Watermark data embedding apparatus and extracting apparatus |
| 05/02/2008 | WO2008049235A1 Systems and methods for controlling production quantities |
| 05/01/2008 | US20080101603 System and method for copy protection for digital signals |
| 05/01/2008 | US20080101601 Method and apparatus for preparing and verifying documents |
| 04/30/2008 | CN100385849C Information recording device information reproducing device, information recording mehtod and information reproducing method |
| 04/29/2008 | US7366701 Copy protection of data |
| 04/23/2008 | CN100383879C Information recording medium driving device, system and method for controlling data reproduction |
| 04/22/2008 | US7363512 System and method of content copy control |
| 04/16/2008 | EP1554640B1 Watermark insertion apparatus and watermark extraction apparatus |
| 04/10/2008 | WO2008009743A3 Anti-counterfeit packaging |
| 04/10/2008 | US20080083318 Method and system for synthesizing electronic transparent audio |
| 04/09/2008 | EP0938807B1 Imprinting id information into a digital content and reading out the same |
| 04/08/2008 | US7356699 Electronic watermark detection device and electronic watermark detection method |
| 04/02/2008 | CN201044138Y Multiple image encryption device |
| 04/01/2008 | CA2434722C Method of copy protecting signals |
| 03/26/2008 | EP1049259B1 Vibration wave encoding method and method |
| 03/25/2008 | US7349539 Encoding and encrypting devices for secure scalable data streaming |
| 03/20/2008 | WO2008031205A1 Multiple sequential security key encryption - decryption |
| 03/20/2008 | US20080072335 Identifying material |
| 03/05/2008 | EP0981901B1 Embedding auxiliary data in a signal |
| 02/26/2008 | US7337321 Digital content protection using invisible and visible watermarks |
| 02/26/2008 | US7336799 Digital watermark embedding device and digital watermark embedding method |
| 02/21/2008 | US20080044015 System and Method for Digital Image Encoding |
| 02/19/2008 | US7333716 Duplication controlling method, duplication controlling apparatus, recording medium, and duplication controlling program embodied on computer-readable medium |
| 02/19/2008 | US7333629 Authentic document and method of making |
| 02/13/2008 | EP1095376B1 Apparatus and method for embedding and extracting information in analog signals using replica modulation |
| 02/12/2008 | US7330550 Cryptographic system and method that uses excitation spectroscopy |
| 02/07/2008 | WO2008016735A1 Document with linked viewer file for correlated printing |
| 02/07/2008 | CA2668658A1 Document with linked viewer file for correlated printing |
| 02/05/2008 | US7327934 Data reproduction apparatus, data recording apparatus, circuit element, data reproduction method and data recording method |
| 01/30/2008 | EP1522165A4 Parallel distribution and fingerprinting of digital content |
| 01/24/2008 | WO2008009743A2 Anti-counterfeit packaging |
| 01/23/2008 | EP1880344A2 Security enhancements of digital watermarks for multi-media content |
| 01/17/2008 | DE202007015116U1 Privater, steganografischer Aufnehmer zum Verbergen von Computerinformationen mittels vielfacher Ablage von Mitteilungen Private, steganographic pickup to hide computer information using multiple storage of messages |
| 01/16/2008 | EP1877958A2 System reactions to the detection of embedded watermarks in a digital host content |
| 01/08/2008 | US7318158 Derivation and quantization of robust non-local characteristics for blind watermarking |
| 01/08/2008 | US7318157 Derivation and quantization of robust non-local characteristics for blind watermarking |
| 01/02/2008 | EP1152412B1 Recording medium, data recording method and apparatus, data reproducing method and apparatus |
| 01/01/2008 | US7315621 Digital watermark-embedding apparatus, digital watermark-embedding method, and recording medium |
| 12/25/2007 | US7313235 Device and method of applying a parity to encrypt data for protection |
| 12/12/2007 | EP0981903B1 Watermark detection |
| 12/12/2007 | CN101086811A Multiple image encryption method and device using optical polarization status |
| 12/04/2007 | US7305702 Systems and methods for distributed administration of public and private electronic markets |
| 12/04/2007 | US7304227 Method and system for synthesizing electronic transparent audio |
| 11/29/2007 | US20070273147 Vacuum Roll Coated Security Thin Film Interference Products With Overt And/Or Covert Patterned Layers |
| 11/27/2007 | US7302162 Modulation of a video signal with an impairment signal to increase the video signal masked threshold |
| 11/22/2007 | US20070269725 Light control material for displaying color, information, and images |
| 11/22/2007 | US20070269044 Digital library system with rights-managed access |
| 11/20/2007 | US7298865 Secure robust high-fidelity watermarking |
| 11/15/2007 | WO2005044622A3 Method and apparatus for loss of control inhibitor systems |
| 11/13/2007 | US7296161 Image processing apparatus and image processing method |
| 11/08/2007 | WO2007093652A8 Secret code medium |