| 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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| 02/07/2001 | CN1282898A Computer with encrytion function |
| 01/31/2001 | EP1073015A2 Image signal processor for compression and encoding |
| 01/31/2001 | CN1282437A Method for identifying image or document |
| 01/31/2001 | CN1282059A Code-printing central control anti-false system adopting modern cryptographic technique |
| 01/24/2001 | EP1071289A2 Watermarking data streams |
| 01/24/2001 | CN1281203A Equipment used for solving equation system on finite field and equipment used for inverse operation of epitaxial field element |
| 01/23/2001 | US6178243 User-controlled document processing |
| 01/17/2001 | EP1069773A2 Copyright protection method, information signal processing system, information signal output apparatus, information signal processing apparatus, information signal output method, information signal processing method, and information signal recording medium |
| 01/17/2001 | EP1069757A2 Method and apparatus for inserting and extracting watermark into and from contents information |
| 01/17/2001 | EP1069498A2 Apparatus for solving system of equations on finite field and apparatus for inverting element of extension field |
| 01/10/2001 | EP1067540A2 Copy protection by adding copy control information |
| 01/10/2001 | CN1279849A System and method for authentication of goods |
| 01/09/2001 | CA2206135C Method for certifying a copy of a document such as a fax |
| 12/27/2000 | EP1063833A2 System for filtering data utilizing electronic watermark |
| 12/27/2000 | EP1062585A1 Method and apparatus for camouflaging data |
| 12/20/2000 | EP1060473A1 Method and apparatus for preventing removal of embedded information in cover signals |
| 12/20/2000 | CN1277780A Use of a watermark for the purpose of copy protection |
| 12/19/2000 | US6161869 Machine-readable security document and method of preparing the same |
| 12/05/2000 | US6157330 Embedding supplemental data in an encoded signal, such as audio / video watermarks |
| 11/29/2000 | EP1056043A2 Video recording and reproducing apparatus and method with data modification detection |
| 11/29/2000 | EP1055321A1 Secure distribution of digital representations |
| 11/28/2000 | US6154571 Robust digital watermarking |
| 11/23/2000 | WO2000070585A1 Methods and systems for controlling computers or linking to internet resources from physical and electronic objects |
| 11/23/2000 | WO2000070523A1 Methods and systems employing digital watermarking in music and other media |
| 11/23/2000 | CA2373511A1 Methods and systems for controlling computers or linking to internet resources from physical and electronic objects |
| 11/23/2000 | CA2373208A1 Methods and systems for processing audio |
| 11/22/2000 | EP1054546A2 Receiving apparatus, methods and media |
| 11/22/2000 | EP1054335A2 Methods and systems for controlling computers or linking to internet resources from physical and electronic objects |
| 11/22/2000 | CN1274504A Method and system for preventing unauthorizd playback of broadcasted digital data streams |
| 11/16/2000 | WO2000068875A1 Authenticating executable code and executions thereof |
| 11/15/2000 | EP1052612A1 Watermark applied to one-dimensional data |
| 11/15/2000 | EP0799246B1 Improved mutable composition |
| 11/09/2000 | WO2000067095A1 Methods and apparatus for secure distribution of software |
| 11/09/2000 | WO2000004727A3 Use of a watermark for the purpose of copy protection |
| 11/09/2000 | CA2369834A1 Methods and apparatus for secure distribution of software |
| 11/07/2000 | US6145081 Method and apparatus for preventing removal of embedded information in cover signals |
| 11/07/2000 | CA2086430C System for the secure storage and transmission of data |
| 11/02/2000 | WO2000065840A1 Method for inserting a watermark into an image |
| 11/02/2000 | EP1049259A1 Vibration wave encoding method and method |
| 11/02/2000 | EP1048172A2 Use of a watermark for the purpose of copy protection |
| 11/02/2000 | EP1048168A1 Anti-counterfeiting method and apparatus using digital screening |
| 11/02/2000 | CA2367420A1 Method for inserting a watermark into an image |
| 10/31/2000 | US6141753 Secure distribution of digital representations |
| 10/31/2000 | CA2243469C Encoding technique for software and hardware |
| 10/25/2000 | EP1046169A1 System and method for copy protection for digital signals |
| 10/24/2000 | US6137892 Data hiding based on neighborhood attributes |
| 10/11/2000 | CN1269672A Additional information insertion method, detection method, insertion apparatus and detection apparatus |
| 10/05/2000 | WO2000059148A1 Digital watermarking method and apparatus |
| 10/05/2000 | WO2000058962A1 Usage dependent ticket to protect copy-protected material |
| 10/05/2000 | WO2000058928A1 Method and apparatus for signal processing |
| 10/05/2000 | CA2333884A1 Method and apparatus for signal processing |
| 10/04/2000 | EP1041819A1 Playback control, authentication and decoding for datastreams including object streams |
| 10/04/2000 | EP1041805A2 A watermark-data-hiding apparatus |
| 10/04/2000 | CN1269099A Water-mark detection |
| 10/04/2000 | CN1269098A Detection and sysetm for watermark |
| 10/04/2000 | CN1268843A Device and method of of information processing |
| 10/03/2000 | US6128736 Method for inserting a watermark signal into data |
| 10/03/2000 | US6128411 Method for embedding one or more digital images within another digital image |
| 10/03/2000 | US6127073 Method for concealing information and document for securely communicating concealed information |
| 09/27/2000 | EP1039414A2 Electronic watermark inserting apparatus capable of inserting electronic watermark into tv image data in real time, and electronic watermark inserting method |
| 09/27/2000 | EP1038395A1 Use of a watermark for the purpose of copy protection |
| 09/27/2000 | CN1267999A Electronic watermark inserting apparatus and its method |
| 09/21/2000 | WO2000056059A1 A method and apparatus for generating multiple watermarked copies of an information signal |
| 09/21/2000 | WO2000054984A1 Improved tamper-evident form |
| 09/21/2000 | CA2367880A1 A method and apparatus for generating multiple watermarked copies of an information signal |
| 09/20/2000 | EP0760987B1 Method of verifying the integrity of data stored on a processing facility used for processing sheet-like articles such as bank notes or bills |
| 09/19/2000 | US6120949 A temporary markings comprising a colorant, a mutable colorant and an ultraviolet radiation transorber, when irradiating with ultraviolet radiation, and changing the colorant to colorless |
| 09/14/2000 | WO2000054453A1 Signal processing methods, devices, and applications for digital rights management |
| 09/13/2000 | EP1034648A1 Method and apparatus for use of a watermark and a receiver dependent reference for the purpose of copy protection |
| 09/13/2000 | EP1034635A1 Watermarking of digital image data |
| 09/13/2000 | CN1266587A Method and device for watermark |
| 09/13/2000 | CN1266586A Auxiliary data embedding into signal |
| 09/09/2000 | EP1048172A3 Use of a watermark for the purpose of copy protection |
| 09/06/2000 | EP0879535B1 Method of marking binary-coded data sets |
| 08/30/2000 | EP1032205A2 Additional information embedding and detecting method and apparatus |
| 08/30/2000 | EP1031113A1 Method for identifying an image or a document |
| 08/29/2000 | US6111990 Digital-watermark superposing apparatus and digital-watermarker detecting apparatus |
| 08/23/2000 | EP1030511A2 Apparatus for and method of embedding and extracting digital information and medium having program for carrying out the method recorded thereon |
| 08/22/2000 | US6108434 Counteracting geometric distortions for DCT based watermarking |
| 08/22/2000 | CA2299123A1 Additional information embedding method, additional information detecting method, additional information embedding apparatus and additional information detecting apparatus |
| 08/15/2000 | US6104812 Anti-counterfeiting method and apparatus using digital screening |
| 08/09/2000 | EP1025665A1 System and method for authentication of goods |
| 08/03/2000 | WO2000045336A1 Method and apparatus for encoding image information into puzzle-type |
| 08/01/2000 | US6095425 Machine-readable security document and method of preparing the same |
| 07/27/2000 | WO2000044163A1 Method for embedding electronic watermark, decoding method, and devices for the same |
| 07/19/2000 | EP1020478A1 Method of making a substrate comprising a colored composition by using an improved mutable composition and so produced substrate |
| 07/19/2000 | EP1020076A1 Watermarking of digital object |
| 07/12/2000 | EP1018833A2 Applying digital watermarks to data files |
| 07/12/2000 | EP1018266A1 Method and system for preventing unauthorized playback of broadcasted digital data streams |
| 07/12/2000 | CN2387606Y Frontpanel keys controller |
| 07/12/2000 | CN1260055A Obfuscation techniques for enhancing software security |
| 07/11/2000 | US6088452 Encoding technique for software and hardware |
| 07/11/2000 | US6086706 Document copying deterrent method |
| 07/05/2000 | EP1016541A2 Intermediate support for transfer printing objects with encoded data |
| 07/05/2000 | EP0808541B1 Marking a video and/or audio signal |
| 07/05/2000 | CN1258915A Method for protecting copyright of information signal, recording and outputting method and apparatus |
| 07/05/2000 | CN1258910A Signal conversion equipment and method |
| 06/29/2000 | WO2000038426A1 Method and system for protecting digital data from unauthorized copying |
| 06/29/2000 | WO2000038157A1 Method for inserting a watermark signal into data |
| 06/29/2000 | CA2321255A1 Method and system for protecting digital data from unauthorized copying |