| 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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| 10/10/2002 | WO2002059724A3 Apparatus, method and system for tracking information access |
| 10/10/2002 | US20020146120 Inspecting print quality using digital watermarks |
| 10/09/2002 | WO2001088899A2 Method for integrating hidden information in a set of notes |
| 10/09/2002 | EP1248467A2 Digital watermark embedding method, digital watermark embedding apparatus and recording medium having a digital watermark |
| 10/09/2002 | CN2515748Y Seal with puzzle lock |
| 10/09/2002 | CN2515747Y Anti-false mark with safety line for network information |
| 10/09/2002 | CN1373599A Digital watermark embedding method and apparatus, and record medium with digit watermark |
| 10/09/2002 | CN1373462A Cipher input device |
| 10/09/2002 | CA2405948A1 Method for integrating hidden information in a set of notes |
| 10/03/2002 | WO2002037331A8 System and method for hashing digital images |
| 10/02/2002 | CN1372235A Sound and key double-way input method for Chinese character |
| 10/02/2002 | CN1372234A Anti-counterfeit method with built-in image information |
| 10/01/2002 | US6459803 Method for encoding auxiliary data within a source signal |
| 09/26/2002 | WO2002058453A3 Apparatus, method and system for effecting information access in a peer environment |
| 09/26/2002 | US20020138734 Identifying material |
| 09/26/2002 | US20020136427 Copy protection via multiple tests |
| 09/25/2002 | EP1243126A1 Methods and systems for fingerprinting digital data |
| 09/25/2002 | CN1371215A Digital watermark embedding method and equipment and record medium with digital watermark |
| 09/25/2002 | CN1371082A Method and mobile device for end-to-end enciphere |
| 09/24/2002 | US6456985 Image encrypting method and device, image decrypting method and device, and recording medium |
| 09/24/2002 | US6456724 Electronic watermarking system capable of providing image data with high secrecy |
| 09/19/2002 | WO2002047078A3 System and method for protecting digital media |
| 09/19/2002 | US20020130764 User authentication system using biometric information |
| 09/12/2002 | WO2002071752A1 Content distribution/protecing method and apparatus |
| 09/12/2002 | WO2002071679A2 Theft resistant graphics |
| 09/12/2002 | WO2002071403A1 Enhanced copy protection of proprietary material employing multiple watermarks |
| 09/12/2002 | US20020129253 Watermarking a compressed information signal |
| 09/12/2002 | US20020128911 Electronic coupon method, electronic coupon system, marketing server, purchaser terminal, order-receiving terminal, and program |
| 09/12/2002 | US20020126996 Duplication controlling method, duplication controlling apparatus, recording medium, and duplication controlling program embodied on computer-readable medium |
| 09/12/2002 | US20020126842 Enhanced copy protection of proprietary material employing multiple watermarks |
| 09/11/2002 | EP1239675A2 Duplication controlling method, duplication controlling apparatus, recording medium, and duplication controlling program embodied on computer-readable medium |
| 09/11/2002 | EP1239413A2 Authentication using a digital watermark |
| 09/10/2002 | US6449380 Method of integrating a watermark into a compressed image |
| 09/10/2002 | US6449379 Video steganography methods avoiding introduction of fixed pattern noise |
| 09/10/2002 | US6449378 Data processing apparatus and method and storage medium |
| 09/08/2002 | CA2374772A1 Authentication using a digital watermark |
| 09/06/2002 | WO2002069071A2 Copy protection via multiple tests |
| 09/05/2002 | US20020124173 Watermarked material processing |
| 09/05/2002 | US20020122568 Digital authentication with digital and analog documents |
| 09/05/2002 | US20020122566 Methods and apparatus for embedding data and for detecting and recovering embedded data |
| 09/04/2002 | EP1236181A1 Secure photo carrying identification device, as well as means and method for authenticating such an identification device |
| 08/29/2002 | WO2002067257A1 Apparatus and method for controlling the copy and play of a digital audio contents |
| 08/29/2002 | US20020118831 Counteracting geometric distortions in watermarking |
| 08/28/2002 | CN1366670A Protecting content from illicit reproduction by proof of existence of complete data set via self-referencing sections |
| 08/22/2002 | WO2002065783A1 Method and arrangement for detecting multiple watermarks in an information signal |
| 08/22/2002 | WO2002065753A1 Method and arrangement for detecting a watermark in an information signal |
| 08/22/2002 | US20020115941 Systems and methods using annotated images for controlling the use of diagnostic or therapeutic instruments in interior body regions |
| 08/22/2002 | US20020114490 Methods, apparatus and systems for an electronic watermark having resistance to scaling |
| 08/22/2002 | US20020114456 Recording medium, recording method of recording medium, recording and/or reproducing method of recording medium, and data copy control method |
| 08/20/2002 | US6438692 Copy protection apparatus and information recording medium used in this copy protection apparatus |
| 08/15/2002 | US20020110361 Digital watermark embedding method, digital watermark embedding apparatus and recording medium having a digital watermark |
| 08/15/2002 | US20020110259 Digital watermark embedding method, digital watermark embedding apparatus and recording medium having a digital watermark |
| 08/14/2002 | EP1231792A2 Digital watermark embedding method, digital watermark embedding apparatus and recording medium having a digital watermark |
| 08/14/2002 | CN2505945Y Self locking antiforgery antiprizeing encode seal for measuring apparatus |
| 08/14/2002 | CN1089181C Copy-proof electronic chaos fingerprints security method |
| 08/13/2002 | US6434253 Data processing apparatus and method and storage medium |
| 08/08/2002 | US20020108043 Method and apparatus for encrypting and decrypting data using encrypting key contained in electronic watermark |
| 08/08/2002 | US20020106192 Contents data, recording medium, recording method and device, reproducing method and device |
| 08/07/2002 | CN2504704Y Inquireable print prevented natural code anti-fraud marker |
| 08/07/2002 | CN1088879C Apparatus for mfg display type holographic cipher by moire technique |
| 08/06/2002 | US6430302 Steganographically encoding a first image in accordance with a second image |
| 08/01/2002 | WO2002060182A1 Watermarking a compressed information signal |
| 08/01/2002 | WO2002060112A2 Apparatus, method and system for multiple resolution affecting information access |
| 08/01/2002 | WO2002060110A2 Apparatus, method, and system for accessing digital rights management information |
| 08/01/2002 | WO2002059797A1 Apparatus, method and system for directory quality assurance |
| 08/01/2002 | WO2002059739A1 Apparatus method and system for registration effecting information access |
| 08/01/2002 | WO2002059724A2 Apparatus, method and system for tracking information access |
| 08/01/2002 | WO2002058453A2 Apparatus, method and system for effecting information access in a peer environment |
| 08/01/2002 | US20020104003 Digital watermark processing apparatus, and digital contents distribution system using the apparatus |
| 07/30/2002 | US6427012 Apparatus and method for embedding and extracting information in analog signals using replica modulation |
| 07/25/2002 | US20020097892 Digital watermark insertion system and digital watermark characteristic table creating device |
| 07/25/2002 | US20020097873 Apparatus and method for embedding and extracting information in analog signals using replica modulation |
| 07/23/2002 | US6425082 Watermark applied to one-dimensional data |
| 07/18/2002 | WO2002056264A1 Apparatus and method for issuing and authenticating securities, etc. using digital watermarking |
| 07/18/2002 | US20020095577 Embedding, processing and detection of digital content, information and data |
| 07/18/2002 | US20020094082 Method and system for embedding message data in a digital image sequence |
| 07/17/2002 | EP0877998B1 Digital anti-counterfeiting software method and apparatus |
| 07/17/2002 | CN2501140Y Anti-forge tongue paper for cigarette |
| 07/11/2002 | WO2002054666A1 Content data transmitting device and method, and recording/reproducing device |
| 07/11/2002 | WO2002054381A1 Recording medium, recording medium recording method and apparatus, information signal output control method, recording medium reproducing apparatus, signal transmission method, and content data |
| 07/09/2002 | US6418232 Method of authenticating digital-watermark pictures |
| 07/04/2002 | WO2000054453A9 Signal processing methods, devices, and applications for digital rights management |
| 07/04/2002 | US20020085736 Method and arrangement for embedding a watermark in an information signal |
| 07/04/2002 | US20020085735 Method for generating and detecting marks |
| 07/04/2002 | US20020085718 Steganography decoding methods employing error information |
| 07/02/2002 | US6415042 Digital image coding/decoding apparatus and method for evaluating the quality of images transmitted using watermarking |
| 07/02/2002 | US6415041 Digital watermark insertion system and digital watermark characteristic table creating device |
| 07/02/2002 | US6414761 Secure holographic images on paper |
| 06/27/2002 | WO2001088899A3 Method for integrating hidden information in a set of notes |
| 06/27/2002 | US20020080993 Hiding encrypted messages in information carriers |
| 06/26/2002 | EP1217840A2 System and method for embedding a watermark in digital image sequences |
| 06/26/2002 | CN2497378Y Safety anti counterfeit sealing paster |
| 06/20/2002 | US20020078356 Contents copy managing system and method thereof, information processing device and method thereof, server, and storing medium |
| 06/19/2002 | EP1215625A2 Method and system for embedding message data in a digital image sequence |
| 06/19/2002 | CN1354448A Material enciphering and deciphering system in master/slave rack construction and its method |
| 06/13/2002 | WO2002047078A2 System and method for protecting digital media |
| 06/13/2002 | US20020073037 Method and system for controlling copy generations of digital data |
| 06/12/2002 | EP1213912A2 Methods and apparatus for embedding data and for detecting and recovering embedded data |
| 06/11/2002 | US6404898 Method and system for encoding image and audio content |
| 06/11/2002 | US6402986 Compositions and methods for luminescence lifetime comparison |