| 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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| 02/03/2005 | WO2004038531B1 Watermark insertion apparatus and watermark extraction apparatus |
| 02/03/2005 | US20050025313 Digital imaging system for creating a wide-angle image from multiple narrow angle images |
| 02/02/2005 | EP1185957B1 Protecting content from illicit reproduction by proof of existence of a complete data set via self-referencing sections |
| 02/02/2005 | CN1187751C Copying control method and copying control device |
| 02/01/2005 | US6850619 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 |
| 01/27/2005 | US20050021967 Watermark-based access control method and device |
| 01/27/2005 | US20050018876 Determination of a segmentation of a digital signal for inserting watermarking signals and the associated insertion |
| 01/26/2005 | EP1500069A2 Device for reconstructing a graphical message |
| 01/26/2005 | CN1186216C Tamper-evident form for securely carrying information |
| 01/19/2005 | CN1568506A Method and apparatus for the encryption of data |
| 01/19/2005 | CN1185654C Digital data copying controlling system and method and CD player |
| 01/12/2005 | EP1020076B1 Watermarking of digital object |
| 01/12/2005 | CN1184579C Data processing apparatus and method |
| 01/11/2005 | CA2224019C Data hiding method and data extraction method using statistical examination |
| 01/05/2005 | CN1183771C Embedding supplemental data in encoded signal |
| 01/05/2005 | CN1183739C Digital image coding/decoding device and method for recording and recovering signature image |
| 01/04/2005 | US6839844 Image encryption method and device |
| 01/04/2005 | US6839673 Digital watermarking method and apparatus for audio data |
| 12/30/2004 | US20040268128 Information recording medium drive device, information processing apparatus, data replay control system, data replay control method, and computer program |
| 12/29/2004 | EP1491033A1 Watermarking a digital object with a digital signature |
| 12/29/2004 | CN1558385A Method of preventing file inset replacement |
| 12/29/2004 | CN1182698C Invisable coding of element information |
| 12/28/2004 | US6836844 Information signal copy managing method, information signal recording method, information signal output apparatus, and recording medium |
| 12/22/2004 | EP1489514A1 Information image utilization system, information image management server, information image management method, device information image, program, and recording medium |
| 12/22/2004 | EP1489513A1 Information image utilization system, information image management device, information image management method, content information image, program, and recording medium |
| 12/22/2004 | CN1181488C Usage dependent ticket to protect copy-protected material |
| 12/21/2004 | US6834345 Method for data preparation and watermark insertion |
| 12/16/2004 | US20040255123 Data embedding method and viewing confirmation method |
| 12/16/2004 | US20040252834 Scrambling of image by randomizing pixel values |
| 12/16/2004 | US20040252832 Method and apparatus for the encryption of data |
| 12/15/2004 | EP0941605B1 Method and arrangement for detecting a watermark |
| 12/08/2004 | EP1407344A4 Electronic vouchers and a system and method for issuing the same |
| 12/08/2004 | CN1179545C Protecting images with image watermark |
| 12/01/2004 | CN1178462C Communication terminal device |
| 12/01/2004 | CN1178456C Method and apparatus for imprinting ID information into a digital content and for reading out the same |
| 12/01/2004 | CN1178225C Method and device recording and/or reproducing method of recording medium |
| 11/30/2004 | US6826289 System for changing attribute of image by electronic watermark |
| 11/25/2004 | WO2004102950A1 Printed document falsification detection device and falsification detection method |
| 11/25/2004 | WO2004038531A3 Watermark insertion apparatus and watermark extraction apparatus |
| 11/25/2004 | US20040236951 Digital authentication with digital and analog documents |
| 11/25/2004 | US20040234099 Robust and stealthy video watermarking |
| 11/24/2004 | EP1025665A4 System and method for authentication of goods |
| 11/24/2004 | CN1177431C Method and mobile device for end-to-end enciphere |
| 11/23/2004 | US6823455 Method for robust watermarking of content |
| 11/18/2004 | US20040228486 System and method for copy protection for digital signals |
| 11/17/2004 | EP1476782A1 Light control material for displaying color, information, and images |
| 11/17/2004 | EP1476317A1 Micro-optics for article identification |
| 11/17/2004 | CN1547693A Electronic vouchers and a system and method for issuing the same |
| 11/16/2004 | US6819774 Determination of a segmentation of a digital signal for inserting watermarking signals and the associated insertion |
| 11/16/2004 | US6817535 Usage dependent ticket to protect copy-protected material |
| 11/10/2004 | EP1474924A2 Watermark-based access control method and device |
| 11/04/2004 | US20040220828 Trade indication data transmission method and system, and reception apparatus |
| 11/04/2004 | US20040218906 System and method for copy protection for digital signals |
| 11/03/2004 | EP1472584A1 Secure data input dialogue using visual cryptography |
| 11/03/2004 | EP1185967A4 Methods and systems for controlling computers or linking to internet resources from physical and electronic objects |
| 11/03/2004 | CN1174627C Watermarked material processing |
| 11/02/2004 | US6813367 Method and apparatus for site selection for data embedding |
| 10/28/2004 | US20040213053 Stream recording and/or reproducing apparatus and recording and/or reproducing method |
| 10/27/2004 | CN1540600A Method for protecting audio data |
| 10/27/2004 | CN1540599A Vulnerable watermark method for protecting electronic signet |
| 10/27/2004 | CN1173312C Electronic watermark imbedding method and device thereof |
| 10/21/2004 | WO2004090804A1 Two-dimensional bar-code creating device, two-dimensional bar-code reader, two-dimensional bar-code creating method, two-dimensional bar-code reading method, and program |
| 10/20/2004 | CN1539142A Portecting content from illicit reproduction by proof of existence of complete data set |
| 10/20/2004 | CN1539126A Apparatus and method for encrypting/decrypting information on basic element-by-basic element basis and encryption/decryption system using the same |
| 10/20/2004 | CN1538360A Antifalse copying paper and detector possessing memory cipher and is detecting method |
| 10/20/2004 | CN1172268C Information processing method |
| 10/19/2004 | US6807365 Video data recording and reproducing apparatus, a video data reproducing apparatus, and a method of recording and reproducing video data with data modification detection |
| 10/19/2004 | US6807285 Embedding information in digital image data |
| 10/12/2004 | US6804372 Coding apparatus and method, decoding apparatus and method, data processing system, storage medium, and signal |
| 10/05/2004 | US6802011 Copyright protection information protecting method, information signal processing method, information signal reproducing method, information signal recording method, and information signal processing device, information signal reproducing device, and information signal recording device |
| 09/30/2004 | US20040193987 Protection of software code from unauthorized use by executing portions of the code in a secure computer environment separate from the environment that executes the remaining portions of the code |
| 09/29/2004 | CN1533531A Information image utilizing system, information image managing apparatus, informaton image managing method, contents information image, program and recording medium |
| 09/29/2004 | CN1169359C Data processing apparatus and method and storage medium |
| 09/28/2004 | US6798894 Method and apparatus for watermarking video images |
| 09/23/2004 | US20040184612 Method of and apparatus for creating image processing program, computer program for creating image processing program |
| 09/22/2004 | EP1459557A2 Increasing integrity of watermarks using robust features |
| 09/22/2004 | CN1168010C Information processing apparatus and method |
| 09/21/2004 | US6795566 Method of integrating a watermark into a compressed image |
| 09/16/2004 | US20040181661 Print processor and spooler based encryption |
| 09/15/2004 | CN1529299A Method for embedding visible and invisible dual water print in digital image |
| 09/15/2004 | CN1529282A Method and device for uniting digital water print based on singular value analysis and spread spectrum technique |
| 09/14/2004 | US6792130 System and method for embedding a watermark signal that contains message data in a digital image |
| 09/14/2004 | US6792110 Apparatus and method for enhancing the security of negotiable instruments |
| 09/08/2004 | CN1527257A Object-oriented self-synchronizing water mark detecting method for multimedia product |
| 09/08/2004 | CN1166187C Detection and system for watermark |
| 09/02/2004 | US20040170275 Apparatus and method for cryptographing and deciphering image |
| 08/31/2004 | US6785399 Receiving apparatus, transmitting apparatus, and communication system which utilize a watermark insertion technique |
| 08/31/2004 | US6785390 System and method for asynchronous decryption |
| 08/18/2004 | CN1522407A Information image utilizing system, information image managing server, information image managing method, apparatus information image, program and recording medium |
| 08/18/2004 | CN1162817C Distortion-free data-hiding method |
| 08/12/2004 | US20040156081 Passive hidden imaging |
| 08/11/2004 | EP1444694A1 Method of and apparatus for preventing illicit copying of digital content |
| 08/11/2004 | CN2631956Y Case with grating |
| 08/10/2004 | US6775391 Associated information adding apparatus and method associated information detecting apparatus and method and illegal use preventing system |
| 08/05/2004 | US20040151316 Apparatus and method for embedding and extracting information in analog signals using distributed signal features and replica modulation |
| 08/04/2004 | CN1517231A Image processing device and its method, cmputer program and storage medium |
| 08/04/2004 | CN1160935C Watermaking processing of information signal |
| 08/03/2004 | US6771794 Electronic watermark generating apparatus, electronic watermark generating method and memory medium therefor |
| 07/29/2004 | US20040148507 Image processor, method thereof, computer program, and computer readable storage medium |
| 07/29/2004 | US20040146177 Method and arrangement for detecting a watermark in an information signal |