| 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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| 06/06/2002 | US20020069359 Digital contents generating apparatus and digital contents reproducing apparatus |
| 06/06/2002 | US20020068987 System and method for protecting digital media |
| 06/06/2002 | US20020067828 Copy protected document |
| 06/04/2002 | US6400827 Methods for hiding in-band digital data in images and video |
| 05/29/2002 | EP1208499A1 Methods and systems employing digital watermarking in music and other media |
| 05/29/2002 | CN2493998Y Anti-counterfeit mark article |
| 05/29/2002 | CN1351343A Information recording/playing back device, method and data recording media, program providing media |
| 05/23/2002 | US20020061119 Method for encoding auxiliary data within a source signal |
| 05/23/2002 | US20020061118 Electronic watermarking method and system |
| 05/16/2002 | WO2002039411A1 Apparatus and method for encrypting/decrypting information on a pixel-by-pixel basis and encryption/decryption system using the same |
| 05/16/2002 | WO2002039384A1 Method and arrangement for embedding a watermark in an information signal |
| 05/16/2002 | US20020059522 Data Administration method |
| 05/16/2002 | US20020059520 Informarion processing apparatus, method for controlling the same, and storage medium |
| 05/16/2002 | US20020059208 Information providing apparatus and method, and recording medium |
| 05/16/2002 | US20020057799 Data delivery system, server apparatus, reproducing apparatus, data delivery method, data playback method, storage medium, control, signal, and transmission data signal |
| 05/16/2002 | US20020056990 Tamper-evident form |
| 05/14/2002 | US6389152 Method and apparatus for superposing a digital watermark and method and apparatus for detecting a digital watermark |
| 05/10/2002 | WO2002037331A1 System and method for hashing digital images |
| 05/10/2002 | WO2002037309A1 Method for embedding and extracting text into/from electronic documents |
| 05/08/2002 | EP1204071A2 Method for generating a dispersed message for data embedding |
| 05/08/2002 | CN1348157A Laser anti-fake figure mark and special marking machine |
| 05/07/2002 | US6385330 Method for encoding auxiliary data within a source signal |
| 05/02/2002 | US20020053026 Electronic watermark detection device and electronic watermark detection method |
| 05/02/2002 | US20020051960 Data output method and apparatus, data playback method and apparatus, data recording method and apparatus, and data recording and playback method and apparatus |
| 05/02/2002 | US20020051559 Application of bit-plane decomposition steganography to progressively compressed data |
| 05/02/2002 | US20020051162 Information hiding system, method, and printed matter into which information is hidden |
| 05/02/2002 | EP1202552A2 Method for generating and detecting marks |
| 05/02/2002 | EP1202225A2 Document authentication |
| 04/25/2002 | US20020049569 Watermark detector |
| 04/18/2002 | US20020044673 Method for encoding auxiliary data within a source signal |
| 04/18/2002 | US20020044657 Information recording device, information playback device, information recording method, information playback method, and information recording medium and program providing medium used therewith |
| 04/17/2002 | EP1197965A2 Data delivery system with copyright protection |
| 04/16/2002 | CA2229826C A video-data encoder employing watermarking on selected parts of the video data |
| 04/10/2002 | CN1344462A Invisable coding of element information |
| 04/10/2002 | CN1344209A Improved temper-avident form |
| 04/10/2002 | CN1343942A Electronic mark business and agent method |
| 04/04/2002 | US20020040431 Computer program product and method for exchanging XML signature |
| 04/03/2002 | CN2484610Y Wine-less anti-fake inquiry terminal apparatus |
| 04/03/2002 | CN1342962A Developing reagent for dectylogram sampled by adhesive tape |
| 03/28/2002 | US20020038423 Method of managing an electronic mark using an agent |
| 03/28/2002 | US20020037091 Image transmission system, method of the same, and recording medium |
| 03/28/2002 | US20020037090 Image marking with pixel modification |
| 03/27/2002 | EP1191789A2 Recording and reproducing data with electronic watermark information |
| 03/27/2002 | EP1190386A2 Identifying material |
| 03/26/2002 | US6363159 Consumer audio appliance responsive to watermark data |
| 03/20/2002 | EP1189427A2 A method of managing an electronic mark using an agent |
| 03/20/2002 | EP1189372A2 Audio signal processor comprising a means for embedding an audible watermark in an audio signal, audio player comprising a means for removing the audible watermark and audio distribution system and method using the audio signal processor and the audio player |
| 03/19/2002 | US6359985 Procedure for marking binary coded data sets |
| 03/19/2002 | US6359849 Signal processing apparatus, recording medium, and signal processing method |
| 03/19/2002 | US6359573 Method and system for embedding electronic watermark information in main information |
| 03/14/2002 | US20020032866 Shared image generation apparatus and method, computer program, and computer readable storage medium |
| 03/14/2002 | US20020031221 Information detecting apparatus |
| 03/13/2002 | EP1187132A2 Information providing apparatus and method, and recording medium |
| 03/13/2002 | EP1187127A2 Information recording and playback devices and methods, information recording media and program providing media used therewith |
| 03/13/2002 | EP1185967A1 Methods and systems for controlling computers or linking to internet resources from physical and electronic objects |
| 03/13/2002 | EP1185957A2 Protecting content from illicit reproduction by proof of existence of a complete data set via self-referencing sections |
| 03/13/2002 | EP1185915A1 Methods and apparatus for secure distribution of software |
| 03/13/2002 | CN1340192A Recording medium, data recording method and apparatus, data reproducing method and apparatus, and copying control method |
| 03/12/2002 | US6354494 Secure identification card and method and apparatus for producing and authenticating same |
| 03/07/2002 | US20020029338 Method for data preparation and watermark insertion |
| 03/07/2002 | US20020027994 Audio signal processor, audio player and audio distribution system |
| 03/06/2002 | EP1183872A1 Watermarked material processing |
| 03/06/2002 | CN2480936Y Chip finger ink paster |
| 03/05/2002 | US6353672 Steganography using dynamic codes |
| 02/28/2002 | WO2002017631A1 Digital watermarking for multimedia data |
| 02/28/2002 | US20020026362 Digital content creator/reproducer and advertisement distribution system |
| 02/27/2002 | CN2479599Y Infrared anti-forging material |
| 02/21/2002 | US20020021822 Image transmission device and storage medium with program for realizing its function, image display device and storage medium with program for realizing its function, and image transmission/reception system |
| 02/20/2002 | CN2478197Y Key type fingerprint recognizer |
| 02/20/2002 | CN1336624A Tax controlling card antifake method |
| 02/20/2002 | CN1336623A Commodity anti-fake method utilizing locking cipher lock |
| 02/14/2002 | WO2002013451A1 Classified data-containing data recording medium and method of recording/reproducing the data |
| 02/14/2002 | WO2002013436A1 Method and system for steganographically embedding information bits in source signals |
| 02/14/2002 | US20020019946 Inspection method and system |
| 02/14/2002 | US20020018572 Methods for detecting alteration of audio |
| 02/07/2002 | US20020016916 Watermarking of digital object |
| 02/07/2002 | US20020016774 Network enabled application software system and method |
| 02/07/2002 | US20020015510 Image recording method and apparatus |
| 02/07/2002 | US20020015509 Method and apparatus for superposing a digital watermark and method and apparatus for detecting a digital watermark |
| 02/07/2002 | DE10033562A1 Authenticity characteristic arrangement includes authenticity characteristic with at least two partial characteristics that are arranged in, at or on glass of product in any combination |
| 02/06/2002 | CN2476070Y Cipher graphic anti-false mark |
| 01/30/2002 | CN1333520A Encrypting and user anthority identifying method for single direction data broadcasting system |
| 01/29/2002 | US6343138 Security documents with hidden digital data |
| 01/29/2002 | US6342924 Additional information superposition method and video signal outputting apparatus |
| 01/29/2002 | US6342305 Colorants and colorant modifiers |
| 01/23/2002 | EP1174833A2 Electronic commerce system and method |
| 01/23/2002 | EP1173980A1 Method for inserting a watermark into an image |
| 01/16/2002 | EP1173001A2 Authenticatable image with an embedded image having a discernible physical characteristic |
| 01/16/2002 | EP1031113B1 Method for identifying an image or a document |
| 01/16/2002 | CN2472296Y Laser antifakery coded locking envelope |
| 01/16/2002 | CN1331463A Information encryption method and system with real-time authentication function |
| 01/10/2002 | US20020003880 Copy protection apparatus and information recording medium used in this copy protection apparatus |
| 01/09/2002 | EP1169849A1 A method and apparatus for generating multiple watermarked copies of an information signal |
| 01/09/2002 | EP1088296A4 Method for data preparation and watermark insertion |
| 01/09/2002 | CN1330353A Information encryption method and system |
| 01/03/2002 | WO2001075794A3 Identifying material |
| 01/03/2002 | US20020001396 Files and methods employing common information in both header and steganographic embedding |
| 01/03/2002 | US20020001394 Data processing apparatus, image processing apparatus, and method therefor |
| 01/02/2002 | EP1166547A1 Invisible encoding of meta-information |
| 01/01/2002 | CA2064855C Program transmission optimisation |